Preparation and Mechanical Properties of (TiCrZrNb)C 4 -SiC Multiphase High-Entropy Ceramics

Five carbide powders, TiC, Cr C , ZrC, NbC and SiC, were selected as raw materials and mixed by dry or wet milling. Then (TiCrZrNb)C -SiC multiphase ceramics were successfully prepared by spark plasma sintering (SPS) at 1900 °C, using D-HECs-1900 (dry milling method) and W-HECs-1900 (wet milling met...

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Published in:Materials 2024-12, Vol.17 (23)
Main Authors: Wen, Chunmei, Xu, Shuai, Li, Bingsheng, Gan, Shuyun, Wang, Li, Chen, Keyuan, Xue, Yuwen, Fang, Zhongqiang, Zhao, Fan
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container_title Materials
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creator Wen, Chunmei
Xu, Shuai
Li, Bingsheng
Gan, Shuyun
Wang, Li
Chen, Keyuan
Xue, Yuwen
Fang, Zhongqiang
Zhao, Fan
description Five carbide powders, TiC, Cr C , ZrC, NbC and SiC, were selected as raw materials and mixed by dry or wet milling. Then (TiCrZrNb)C -SiC multiphase ceramics were successfully prepared by spark plasma sintering (SPS) at 1900 °C, using D-HECs-1900 (dry milling method) and W-HECs-1900 (wet milling method), respectively. In this study, the effects of the ball milling method on the microstructure and mechanical properties of the multiphase high-entropy ceramics were systematically investigated. Compared to D-HECs-1900, W-HECs-1900 has a more uniform elemental distribution and smaller grain size, with an average grain size of 1.8 μm, a higher Vickers hardness HV = 2178.41 kg/mm and a higher fracture toughness of K = 4.42 MPa·m . W-HECs-1900 also shows better wear resistance with a wear rate 1.01 × 10 mm ·N ·m . The oxide friction layer formed during friction is beneficial for reducing frictional wear, making W-HECs-1900 a potential wear-resistant material.
doi_str_mv 10.3390/ma17236024
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title Preparation and Mechanical Properties of (TiCrZrNb)C 4 -SiC Multiphase High-Entropy Ceramics
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