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Rheological Properties of Coarse-Grained SiC Slurry and Direct Ink Writing
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Qikai XU1, Zirui LIU1, Hongli ZHOU2, Richu WANG1, Chaoqun PENG1, Xiaofeng WANG1
Mining and Metallurgical Engineering | 2026, 46(4) : 260 - 266
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Mining and Metallurgical Engineering | 2026, 46(4): 260-266
• MATERIALS •
Rheological Properties of Coarse-Grained SiC Slurry and Direct Ink Writing
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Qikai XU1, Zirui LIU1, Hongli ZHOU2, Richu WANG1, Chaoqun PENG1, Xiaofeng WANG1
Affiliations
  • 1.School of Materials Science and Engineering, Central South University, Changsha 410083, Hunan, China
  • 2.Zhangzhou Taiwanese Investment Zone Quality and Metrology Inspection and Testing Institute, Zhangzhou 363107, Fujian, China
doi: 10.3969/j.issn.0253-6099.2026.04.040
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To advance the application of direct ink writing (DIW) in SiC ceramic manufacturing, with coarse-grained SiC powder (D50=44 μm) as raw material, the regulation rules of dispersant, slurry pH value, solid volume fraction and thickener on the rheological properties of slurry were systematically investigated, and high-solid-content slurry suitable for DIW was prepared. The printing parameters were then optimized based on finite element simulation, and the printability of the slurry was quantitatively evaluated via linear fluid span test. The results show that with pH of 10-11, an addition of 1.4% polyacrylic acid (PAA) dispersant can greatly reduce slurry viscosity, and lead to the maximum solid volume fraction of the slurry up to 55%. While an addition of 0.05% methylcellulose (MC) thickener can effectively improve the structural strength of the slurry, bringing in optimal comprehensive printing performance. By adopting a 1.2 mm nozzle with the maximum printing span controlled within 6.3 mm, an intact three-dimensional lattice ceramic green body can be fabricated without collapse.

additive manufacturing  /  SiC  /  ceramic  /  direct ink writing (DIW)  /  rheological property  /  dispersant  /  thickener  /  finite element simulation  /  pH value
徐麒凯, 刘子瑞, 周红莉, 王日初, 彭超群, 王小锋. 粗颗粒SiC浆料流变性能及其直写成型. 矿冶工程杂志, 2026 , 46 (4) : 260 -266 . DOI: 10.3969/j.issn.0253-6099.2026.04.040
Qikai XU, Zirui LIU, Hongli ZHOU, Richu WANG, Chaoqun PENG, Xiaofeng WANG. Rheological Properties of Coarse-Grained SiC Slurry and Direct Ink Writing[J]. Mining and Metallurgical Engineering, 2026 , 46 (4) : 260 -266 . DOI: 10.3969/j.issn.0253-6099.2026.04.040
Appendix
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Year 2026 volume 46 Issue 4
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Article Info
doi: 10.3969/j.issn.0253-6099.2026.04.040
  • Receive Date：2026-01-20
  • Online Date：2026-10-08
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  • Received：2026-01-20
Affiliations
    1.School of Materials Science and Engineering, Central South University, Changsha 410083, Hunan, China
    2.Zhangzhou Taiwanese Investment Zone Quality and Metrology Inspection and Testing Institute, Zhangzhou 363107, Fujian, China
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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
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