Home Journals Articles Updates About
CN
image
收藏切换
Microwave Properties of Metacomposites Containing Carbon Fibres and Ferromagnetic Microwires
收藏切换
PDF
Yang Luo1, Diana Estevez1, Fabrizio Scarpa2, Larissa Panina3, 4, Huan Wang1, Faxiang Qin1, Hua-Xin Peng1
Research. Vol 2019 Article ID 3239879
Less
收藏切换
Research. Vol 2019 Article ID 3239879
• Research Article •
Microwave Properties of Metacomposites Containing Carbon Fibres and Ferromagnetic Microwires
Full
Yang Luo1, Diana Estevez1, Fabrizio Scarpa2, Larissa Panina3, 4, Huan Wang1, Faxiang Qin1, Hua-Xin Peng1
Affiliations
  • 11 Institute for Composites Science Innovation (InCSI), School of Materials Science and Engineering, Zhejiang University, 38 Zheda Rd., Hangzhou 310027, China
  • 22 Bristol Composites Institute (ACCIS), University of Bristol, Queens Building, University Walk, Bristol BS8 1TR, UK
  • 33 National University of Science and Technology, MISiS, Moscow 119991, Russia
  • 44 Institute of Physics, Mathematics & IT, Immanuel Kant Baltic Federal University, A. Nevskogo 14, 236041 Kaliningrad, Russia
About Author:

Authors’ Contributions

Yang Luo and Diana Estevez equally contributed to the present research work in the design, experimentation, and relevant discussions. The rest of the authors provided comments in the discussion on the results and revision of the article. Yang Luo and Diana Estevez are equally contributing authors.

Published: 2019-04-20 doi: 10.34133/2019/3239879
Outline
收藏切换

The microwave properties of composites containing Fe-based ferromagnetic microwires and carbon fibres have been investigated as part of a campaign to bring added functionalities into structural composites. A transmission window observed in 1-6 GHz demonstrates double-negative (DNG), i.e., metamaterial characteristics in the composites containing short-cut carbon fibres and a parallel array of microwires; the metamaterial characteristic is due to the ferromagnetic resonance and a plasmonic behaviour, as short carbon fibres are proved to ameliorate DNG properties through enhancing the impedance of the composites. In parallel, magnetically tunable metamaterial features are realised in composites containing continuous carbon fibres and microwires, which can be switched on/off via rotating the electrical excitation direction. Such structural composites integrated with metamaterial features (termed as metacomposites) are potentially useful for active cloaking applications among others.

Yang Luo, Diana Estevez, Fabrizio Scarpa, Larissa Panina, Huan Wang, Faxiang Qin, Hua-Xin Peng. Microwave Properties of Metacomposites Containing Carbon Fibres and Ferromagnetic Microwires[J]. Research, 2019 , 2019 (4) : 3239879 - . DOI: 10.34133/2019/3239879
Full Text
Less
1. Introduction
Less
“Metamaterial” is a currently widely used term referring to certain materials/systems/devices that exhibit “unusual properties that are not observed in conventional natural materials,” such as the electromagnetically double negative (DNG) feature, which is attractive to a number of ingenious applications ranging from invisibility cloaking to high-resolution imaging [1–3]. DNG property is defined by a negative dielectric permittivity and a negative magnetic permeability that are simultaneously available in the frequency regime of interest, and with an easy design of the topology [4]. However, issues such as narrow DNG bandwidth, poor tunabilities, and high manufacturing costs of metamaterials have limited their industrial exploitation [5]. In this context, as part of a campaign to bring added functionalities to structural composites, we have designed and manufactured “metacomposites” where metamaterial features are integrated with a structural glass-fibre reinforced polymer (GFRP) composite via embedding ferromagnetic microwires [6, 7]. As elucidated in a recent work [6], these metacomposites differ from conventional metamaterials on three basic aspects: (i) they are materials rather than structures, or systems of structures; (ii) they can be produced by using conventional composites manufacturing techniques, instead of micro-/nanofabrication techniques to make complicated building blocks; and (iii) their ultimate properties are dependent not only on the geometric parameters of the architecture, but also on the intrinsic characteristics of the fillers. Thus far, Fe-based ferromagnetic microwires have been selected as “functional fillers,” i.e., “building blocks” in these metacomposites due to their tunable ferromagnetic resonance and tailorable geometrical characteristics [8]. Many interesting features in the microwire metacomposite category have been obtained and understood, e.g., DNG [6, 9], tunable negative permittivity [10, 11], and magnetic/stress tunable properties [12, 13]. These metacomposites are also relatively inexpensive to manufacture, because the embedded microwires can be fixed within the microstructure of the glass/epoxy composites with a classical curing process, as opposed to expensive nanotechnologies that are needed to fabricate conventional metamaterials [14]. Furthermore, an extremely low concentration of microwires (<0.035 wt.%) is normally sufficient to enable DNG properties; this low weight fraction favours the miniaturisation of devices due to the microwires' high sensing capability towards external stimuli such as magnetic field, stresses, and temperature [15–17].
Compared to GFRP composites, carbon fibre reinforced polymer (CFRP) composites are more widely used in aerospace as load-bearing components due to their light weight, high structural strength, and excellent anticorrosion abilities [18, 19]. Embedding microwires into composites containing carbon fibres (CFs) to develop single negative (SNG) or DNG properties is of enormous practical significance in the integration of, e.g., zero-loss structural health monitoring, microwave cloaking, and perfect absorbing functions into existing CFRP components. The outstanding mechanical properties of the microwires can guarantee the overall structural integrity of the developed metacomposites. However, due to electrically reflective nature of CFs and hence the difficulty to extract useful EM parameters from the CFRP composites, there exists two challenges: (i) the concentration of carbon fibres should be carefully designed [20]; (ii) the orientation of carbon fibres needs to be considered which causes the metamaterial features highly anisotropic to external excitation directions.
In the present work, as a step further to our previous focus on GFRP metacomposites [6], we have made our first attempt to design and manufacture metacomposites containing Fe-based microwires and carbon fibres. Important DNG features are verified via the observation of a transmission window in the 1-6 GHz range in the composite containing short-cut CFs. This composite also features a significantly smaller reflection compared to GFRP metacomposites. Metacomposites containing continuous CFs and microwires exhibit a highly anisotropic metamaterial behaviour where magnetically tunable permittivity and permeability are present with the microwires arranged along the electrical field.
2. Materials and Methods
Less
Amorphous glass-coated Fe77Si10B10C3microwires with the total diameter of 20μm and a Pyrex glass coating of 1.7 μm were fabricated by a modified Taylor technique [21–23]. Processing parameters such as wheel rotating speed and cooling water distance were carefully selected to promise a near-perfect cylinder geometry with decent roundness and surface (inset of Figure 2) [24]. The microwires were embedded into an aerospace-graded carbon fibre prepreg of 500×500 mm2(IM8557, Hexcel) in a parallel manner with the spacing of 3mm. One should note that the aligning direction of the microwires should be perpendicular to the direction of the carbon fibres to minimise reflection loss, as indicated in Figure 1(a). In this stage, a microwire-CF prepreg layer was formed (continuous version). In another geometry (short-cut version), the carbon fibre prepregs were cut and arranged in smaller patches (80×10 mm2) as shown in Figure 1(b) and then were included with the microwire array. Preliminary trials indicated that the simple exposure of CFs on the surface of the wire-composites was not the way forward, since the microwave signals were fully blocked and prevented from further interacting with the microwires. Instead, the above microwire-CF prepreg layer should be included as the middle prepreg layer and sandwiched between additional glass-fibre prepreg panels that are microwave-transparent during the laying-up process. Two additional glass fibre prepregs of same size (500×500 mm2) were therefore used to host the microwire-CFs prepreg layer (Figure 1). The whole metacomposite was then cured in autoclave for curing (details can be found in [13]). Microwave measurements were carried out by using a free-space technique in the 0.9-17 GHz with an external dc magnetic bias swept between 0 and 3000 A/m. The S-parameters were extracted during the measurement and then calculated into permittivity and permeability using the Nicolson-Ross-Weir method via a modified built-in computing programme [25].
3. Results and Discussion
Less
Figure 2 describes the magnetic, mechanical, and structural properties of the Fe-based microwires used for the metacomposites. A square-shaped magnetic hysteresis (M-H) loop is observed with a magnetisation saturation of 810 Gs and a small coercivity of 25 Oe; those values suggest the presence of soft magnetic properties. The rectangular loop is due to the longitudinal magnetic anisotropy of the Fe-based microwires that induces a large Barkhausen effect in the magnetisation process [8]. The linear tensile stress-strain curve indicates a typical brittle fracture behaviour at small strains due to the amorphous nature of the microwires. The tensile strength however reaches 1280 MPa, which is beneficial to maintain the mechanical performance of the microwire metacomposites; this attribute is much desirable and advantageous as it is often a concern that the added functionality with introduced fillers will inevitably result in a compromise of otherwise excellent structural property [26].
Figure 3 shows the transmittance and permittivity of the metacomposite containing short-cut CFs and microwires within the 0.7-17 GHz range. Transmission windows are clearly observed in the frequency band of 1-6 GHz (Figure 3(a)). Previous works reveal that the enhancement of the transmission can be derived from double positive or DNG indices [27–29]. However, all negatives in the real part permittivity spectrum observed in the 1-6 GHz band are a clear indication of the DNG properties of our metacomposite (inset of Figure 3(a)). The negative transmission phase velocity also gives evidence to the existence of this DNG feature. The negative permittivity is determined by the plasma frequency via a classic Drude model, which in the metamaterial sense can be simplified to
(1)fp2=c22πb2ln⁡b/a
where a is the radius of wires, b is the spacing, and c is the speed of light [30]. Taking a= 8.3μm (radius of metallic core) and b= 3mm we obtain fp= 16.3 GHz. Therefore, the permittivity should be negative below 6 GHz as evidenced by the permittivity spectra (inset of Figure 3(a)). Meanwhile, permeability values should be negative between the ferromagnetic resonance (FMR) frequency and the ferromagnetic anti-resonance (FMAR). The FMR frequency of the microwires is read as
(2)ωFMR=μ0γH0+MsH0,(3)H0=Hex+Ha
where γ is the gyromagnetic ratio, μ0 is the vacuum permeability, Ms is magnetisation saturation, Ha is the magnetic anisotropy, and Hex is external magnetic field, respectively [27]. From Figure 2 one can obtain Ha=30 Oe, and by substituting Hex=0 Oe the fFMR is calculated as 0.9 GHz. This value coincides with the frequency range of the transmission window. Hence, the obtained DNG values can be attributed to the synergistic action between topology and magnetic properties of the microwires. More importantly, the transmittance level of the metacomposite containing short CFs and wires is enhanced compared with the metacomposite containing parallel wires alone; e.g., the highest transmittance increases from -5.6 dB (52.5%) [6] to -1.6 dB (83.2%) at zero field. The transverse conductivity in the unidirectional CFRP composite is well known to be rather poor due to the electrically insulating matrix resin [20]. Noting that E is placed perpendicularly to the CFs, as a consequence, the magnitude of the permittivity of the wire-composites should be decreased with the insertion of CFs, leading to an increase of the impedance, and an increase of the transmittance of the metacomposites containing carbon fibres. The reduced permittivity is also verified by the presence of an imaginary part of the measured permittivity (inset of Figure 3) with magnitude below 1.8, suggesting a very weak dielectric response.
Of particular note is that the metacomposite containing wires and carbon fibres exhibits significantly lower reflection coefficients in the frequency range where the transmission windows are realised, as opposed to the metacomposite containing 3 mm spaced wires (Figure 3(b), see also [6]). One can conclude that the low transverse conductivity of the CFs patches (in the direction perpendicular to CFs) favours the extraction of left-handed signals in their wire-composite. This feature further guarantees the presence of significant interactions among the transmitted waves in the composites containing short CFs and wires, which benefits the DNG response by enhanced transmitting signals.
Despite the presence of a strong DNG feature, the microwave behaviour of metacomposite containing short-cut CFs and wires is hardly tunable with the presence of magnetic field (Figure 3(a)). Further, a prepreg layer containing continuous CFs and wires (Figure 1(a)) is introduced to improve the impedance match of the wire-composites and hence the tunability. Figure 4 describes the transmission and phase of the metacomposite containing continuous CFs and microwires in the 0.7-17 GHz band with magnetic fields up to 3000 A/m. When the electrical component of the microwaves is oriented along the direction of the microwires, a series of transmission windows are obtained under different magnetic fields (Figure 4(a)). The change of phase velocity reversing from negative to positive together with the negative permittivity (inset of Figures 4(a) and 4(b)) suggests that the DNG properties of such metacomposite still persist. There are two reasons for this: first, the dielectric epoxy in the prepregs prevents the movement of free charges amongst the carbon fibres. The parallel microwire array can be therefore regarded as a dielectric plasma if E is oriented along direction of the wires, therefore favouring the onset of negative permittivity values [31]. The second reason is the presence of an insulating layer of glass on the wires, which can prevent again the movement of free charges from the microwires to the conductive polymer matrix. The electrons are therefore trapped within the metallic cores, making the microwires perfect electric conductors. On the other hand, the transmittance level is slightly decreased compared with the metacomposite containing 3mm spaced microwires, e.g., from -5.6 (52.5%) to -7.8 dB (40.7%) at zero field [6], and this is due to the increase of the overall conductivity when a significant amount of conductive carbon fibres is integrated in the composite.
It is also worth noticing that the magnitudes of the observed transmittance windows are linearly dependent on the increase of external magnetic fields; i.e., the waves can be quantitatively controlled to pass the microwire metacomposite by applying an external magnetic bias (Figure 4(a)). The maximum amplitude variation under different fields reaches 2.4 dB at 3.5 GHz, and this represents 78.5 % of the total incident microwave signals. Quite interestingly, the embedding of the microwires into the composites with continuous CFs still preserves the DNG properties if the microwires are overlapped with the carbon fibres in an orthogonal manner.
As per Kittel’s equation [32], the windows should be tuned towards higher frequencies as the external fields increase. Nevertheless, hard contacts between microwires and reinforcing carbon fibres would create stress-concentration points that may lead to breakage of the surface glass, or even the damage or failure of the wires. The magnetic anisotropy would be also different from the value retrieved from the M-H results (Figure 2), resulting in less tunable state when external magnetic fields are applied.
Neither evident field-tunable nor DNG features are observed in the metacomposite containing continuous CFs and microwires when the electric field is oriented along the direction of the CFs (Figures 4(b) and 4(c)). The transmittance of the composites in this case is rather low; e.g., the lowest transmission is obtained as -41.9 dB (0.8 %) as seen in Figure 4(b). In this scenario, double positive indices are present, with most electromagnetic signals reflected. The transmission phase and permittivity results also suggest the presence of a double positive medium for the composite (Figure 4(d) and inset of Figure 4(b)) because neither ferromagnetic resonance nor dielectric plasma can be excited to realise negative permittivity and permeability values. The comparison of the results shown in Figures 4(a) and 4(c) suggests the presence of an interesting phenomenon: the switch between left-handedness and right-handedness indicated by a conversion of the double-positive to double-negative permittivity values, which is identified by rotating the direction of E. This direction-dependent microwave characteristic of the metacomposites containing continuous CFs and microwires can activate or suppress the metamaterial characteristics by rotating the electrical excitation by 90 degrees. To the best of the authors’ knowledge, this significant microwave direction dependency is identified for the first time in metacomposites with a parallel wires configuration, and it is reminiscent of a similar feature obtained in orthogonal microwire metacomposites [7]. The orthogonal microwire architecture still requires the presence of a parallel array of microwires in the fibre reinforcing direction due to magnetic interactions among wires that can contribute to the generation of negative permeability and hence of the DNG properties [7]. Obviously, such a presence of those wires is a burden design as additional amount of wires is required. Nonetheless, in the present work we manage to attain a very anisotropic metamaterial behaviour by building up a simple parallel stacking geometry of microwires and by reducing the total amount of microwires. In a brief summary, two propagation modes are observed in the metacomposite containing continuous CFs and microwires, i.e., highly transmitting mode with DNG indices, and a highly reflective mode with double positive indices. From the application point of view, anisotropic metamaterial functionalities open up opportunities to develop active microwire cloaks. A composite material with the intrinsic characteristics shown in this work would be able to change its status from cloaking/exposure by adapting its orientation versus the electrical polarisation, with no detriment to its mechanical performance.
4. Conclusions
Less
The paper provides evidence of the generation of electromagnetic metamaterial properties in composites containing carbon fibres and arrays of unidirectional Fe-based microwires. The metacomposite integrated with short-cut carbon fibres and wires features a transmission window within the 1-6 GHz band due to the plasmonic behaviour of array of wires and their FMR. Such DNG property is also observed in the metacomposites containing continuous CFs with the condition that E is along microwires, which otherwise will transform to show a double-positive phenomenon induced by the disappearance of the FMR effect and the plasma excitation. Our metacomposites containing carbon fibres and microwires provide a proof-of-concept that shows it is possible to use ferromagnetic microwires-impregnated composites for, e.g., active microwave cloaking applications.
Funding
Less
  • National Natural Science Foundation of China(51701178; 51671171; 51750110493; 51811530103)
  • Russian Foundation for Basic Research(18-58-53059/18)
  • Basic Funding for Central Universities(2018QNA4001)
  • China Postdoctoral Science Foundation
  • National Youth Thousand Talent Program
References
Less
1
Schurig D., Mock J. J., Justice B. J. et al., , “Metamaterial electromagnetic cloak at microwave frequencies,” Science, vol. 314, no. 5801, pp. 977–980, 2006
2
Landy N. I., Sajuyigbe S., Mock J. J., Smith D. R., and Padilla W. J., “Perfect metamaterial absorber,” Physical Review Letters, vol. 100, no. 20, 2008
3
Shalaev V. M., Cai W., Chettiar U. K. et al., , “Negative index of refraction in optical metamaterials,” Optics Expresss, vol. 30, no. 24, pp. 3356–3358, 2005
4
Smith D. R., Padilla W. J., Vier D. C., Nemat-Nasser S. C., and Schultz S., “Composite medium with simultaneously negative permeability and permittivity,” Physical Review Letters, vol. 84, no. 18, pp. 4184–4187, 2000
5
Soukoulis C. M., and Wegener M., “Past achievements and future challenges in the development of three-dimensional photonic metamaterials,” Nature Photonics, vol. 5, no. 9, pp. 523–530, 2011
6
Luo Y., Peng H. X., Qin F. X. et al., , “Fe-based ferromagnetic microwires enabled meta-composites,” Applied Physics Letters, vol. 103, no. 25, p. 251902, 2013
7
Estevez D., Qin F., Luo Y. et al., , “Tunable negative permittivity in nano-carbon coated magnetic microwire polymer metacomposites,” Composites Science and Technology, vol. 171, no. 8, pp. 206–217, 2019
8
Qin F. X., and Peng H. X., “Ferromagnetic microwires enabled multifunctional composite materials,” Progress in Materials Science, vol. 58, no. 2, pp. 183–259, 2013
9
Makhnovskiy D. P., Panina L. V., Garcia C., Zhukov A. P., and Gonzalez J., “Experimental demonstration of tunable scattering spectra at microwave frequencies in composite media containing CoFeCrSiB glass-coated amorphous ferromagnetic wires and comparison with theory,” Physical Review B: Condensed Matter and Materials Physics, vol. 74, no. 6, pp. 1–11, 2006
10
Ipatov M., Zhukova V., Panina L. V., and Zhukov A., “Ferromagnetic microwires composite metamaterials with tuneable microwave electromagnetic parameters,” Progress In Electromagnetics Research Symposium Proceedings, pp. 1657–1661, 2009
11
Panina L. V., Ipatov M., Zhukova V., Zhukov A., and Gonzalez J., “Microwave metamaterials with ferromagnetic microwires,” Applied Physics A: Materials Science & Processing, vol. 103, no. 3, pp. 653–657, 2011
12
Ipatov M., Zhukova V., Zhukov A., and Gonzalez J., “Magnetic field effects in artificial dielectrics with arrays of magnetic wires at microwaves,” Journal of Applied Physics, vol. 109, 2011
13
Panina L., Ipatov M., Gonzalez J., Zhukova V., and Zhukov A., “Tuneable composites containing magnetic microwires,” Metal, Ceramic and Polymeric Composites for Various Uses, 22, pp. 431–460, 2011
14
Shalaev V. M., “Optical negative-index metamaterials,” Nature Photonics, vol. 1, no. 1, pp. 41–48, 2007
15
Peng H. X., Qin F. X., Phan M. H. et al., , “Co-based magnetic microwire and field-tunable multifunctional macro-composites,” Journal of Non-Crystalline Solids, vol. 355, no. 24-27, pp. 1380–1386, 2009
16
Qin F., Brosseau C., and Peng H. X., “ In situ microwave characterization of microwire composites under mechanical stress,” Applied Physics Letters, vol. 99, no. 25, p. 252902, 2011
17
Qin F., Peng H.-X., Tang J., and Qin L.-C., “Ferromagnetic microwires enabled polymer composites for sensing applications,” Composites Part A: Applied Science and Manufacturing, vol. 41, no. 12, pp. 1823–1828, 2010
18
Chand S., “Carbon fibers for composites,” Journal of Materials Science, vol. 35, no. 6, pp. 1303–1313, 2000
19
Mallick P. K. Fiber-Reinforced Composites: Materials, Manufacturing, and Design, CRC Press, Boca Raton, Florida, USA, 2007
20
Athanasopoulos N., and Kostopoulos V., “Prediction and experimental validation of the electrical conductivity of dry carbon fiber unidirectional layers,” Composites Part B: Engineering, vol. 42, no. 6, pp. 1578–1587, 2011
21
Larin V. S., Torcunov A. V., Zhukov A., González J., Vazquez M., and Panina L., “Preparation and properties of glass-coated microwires,” Journal of Magnetism and Magnetic Materials, vol. 249, no. 1-2, pp. 39–45, 2002
22
Chiriac H., and Óvári T. A., “Amorphous glass-covered magnetic wires: preparation, properties, applications,” Progress in Materials Science, vol. 40, no. 5, pp. 333–407, 1996
23
Baranov S. A., Larin V. S., and Torcunov A. V., “Technology, preparation and properties of the cast glass-coated magnetic microwires,” Crystals, vol. 7, no. 6, pp. 136–148, 2017
24
Zhukov A., “Design of the magnetic properties of fe-rich, glass-coated microwires for technical applications,” Advanced Functional Materials, vol. 16, no. 5, pp. 675–680, 2006
25
Makhnovskiy D., Zhukov A., Zhukova V., and Gonzalez J., “Tunable and self-sensing microwave composite materials incorporating ferromagnetic microwires,” Advances in Science and Technology, vol. 54, pp. 201–210, 2008
26
Qin F. X., Pankratov N., Peng H. X. et al., , “Novel magnetic microwires-embedded composites for structural health monitoring applications,” Journal of Applied Physics, vol. 107, no. 9, p. 09A314, 2010
27
Carbonell J., García-Miquel H., and Sánchez-Dehesa J., “Double negative metamaterials based on ferromagnetic microwires,” Physical Review B: Condensed Matter and Materials Physics, vol. 81, p. 024401, 2010
28
García-Miquel H., Carbonell J., Boria V. E., and Sánchez-Dehesa J., “Experimental evidence of left handed transmission through arrays of ferromagnetic microwires,” Applied Physics Letters, vol. 94, no. 5, p. 054103, 2009
29
García-Miquel H., Carbonell J., and Sánchez-Dehesa J., “Left handed material based on amorphous ferromagnetic microwires tunable by dc current,” Applied Physics Letters, vol. 97, no. 9, p. 094102, 2010
30
Prendry J. B., Holden A., Stewart W. et al., , “Extremely low frequency plasmons in metallic mesostructures,” Physical Review Letters, vol. 76, p. 4773, 1996
31
Liu L., Kong L. B., Lin G. Q., Matitsine S., and Deng C. R., “Microwave permeability of ferromagnetic microwires composites/metamaterials and potential applications,” IEEE Transactions on Magnetics, vol. 44, no. 11, pp. 3119–3122, 2008
32
Kittel C., “On the theory of ferromagnetic resonance absorption,” Physical Review A: Atomic, Molecular and Optical Physics, vol. 73, no. 2, pp. 155–161, 1948
Appendix
Less
Year 2019 volume 2019 Issue 4
PDF
38
21
Cite this Article
BibTeX
Article Info
doi: 10.34133/2019/3239879
  • Receive Date：2019-01-03
  • Online Date：2026-10-27
  • Published：2019-04-20
Article Data
Affiliations
History
  • Received：2019-01-03
  • Accepted：2019-03-25
Funding
National Natural Science Foundation of China(51701178; 51671171; 51750110493; 51811530103)
Russian Foundation for Basic Research(18-58-53059/18)
Basic Funding for Central Universities(2018QNA4001)
China Postdoctoral Science Foundation
National Youth Thousand Talent Program
Affiliations
    11 Institute for Composites Science Innovation (InCSI), School of Materials Science and Engineering, Zhejiang University, 38 Zheda Rd., Hangzhou 310027, China
    22 Bristol Composites Institute (ACCIS), University of Bristol, Queens Building, University Walk, Bristol BS8 1TR, UK
    33 National University of Science and Technology, MISiS, Moscow 119991, Russia
    44 Institute of Physics, Mathematics & IT, Immanuel Kant Baltic Federal University, A. Nevskogo 14, 236041 Kaliningrad, Russia
References
Share
https://castjournals.cast.org.cn/joweb/research/EN/10.34133/2019/3239879
Share to
QR

Scan QR to access full text

Cite this article
BibTeX
Citations
表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
关闭全屏
  • BibTeX
  • EndNote
  • RefWorks
  • TxT
Links
Articles
Latest Articles
Most Read
Collections
Updates
Events
News
Multimedia
About
About Us
Contact
No. 86 Xueyuan South Road, Haidian District, Beijing
100081
010-62662699(Operation and Technical Support)
qkjq@cast.org.cn

Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House