Full
Outline
Developing shape memory alloys with well-balanced comprehensive elastocaloric performance is essential for advancing solid-state refrigeration technologies. Given the excellent mechanical properties and superelasticity of TiZrMoSn alloys， their crystal structure， martensitic transformation， superelasticity， and elastocaloric effect are systematically investigated. By introducing a textured， coarse-grained microstructure to enhance the elastocaloric response and reduce stress hysteresis， alongside a Mo-alloying strategy to tune the stability of austenite and optimize phase transformation reversibility and critical stress， a TiZrMoSn alloy with superior comprehensive performance is successfully developed. The results show that the Ti76Zr18Mo3Sn3 alloy exhibits a dual-state grain structure （columnar and equiaxed grains） with a dominant 〈001〉A texture. Under a strain of 4.5%， the alloy reaches a maximum superelastic stress of 700 MPa， a critical transformation stress of 211 MPa， and a stress hysteresis of about 100 MPa， demonstrating high-stress superelasticity with low energy dissipation. At room temperature， the alloy exhibits a peak adiabatic temperature change （ΔTad） of -7 K， approaching the highest values reported for Ti-based alloys. After 103 elastocaloric cycles， ΔTad only decays by 8%， showing excellent cycling stability. Moreover， the alloy exhibits a wide theoretical working temperature window of up to 220 K， with ΔTad remaining stable （≈7.5 K） across the 300-370 K range， highlighting its outstanding temperature stability and broad applicability in elastocaloric refrigeration.
53
24
| 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
No. 86 Xueyuan South Road, Haidian District, Beijing
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
