（TiCrZrNb）C-SiC多相高熵陶瓷的制备及其力学性能

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

作者信息

Wen Chunmei, Xu Shuai, Li Bingsheng, Gan Shuyun, Wang Li, Chen Keyuan, Xue Yuwen, Fang Zhongqiang, Zhao Fan

机构信息

School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang 621010, China.

State Key Laboratory of Environment-Friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, China.

出版信息

Materials (Basel). 2024 Dec 9;17(23):6024. doi: 10.3390/ma17236024.

DOI:10.3390/ma17236024

PMID:39685459

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11643091/

Abstract

Five carbide powders, TiC, CrC, 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.

摘要

选择了五种碳化物粉末，即碳化钛（TiC）、碳化铬（CrC）、碳化锆（ZrC）、碳化铌（NbC）和碳化硅（SiC）作为原料，并通过干磨或湿磨进行混合。然后，分别使用D - HECs - 1900（干磨法）和W - HECs - 1900（湿磨法），在1900℃下通过放电等离子烧结（SPS）成功制备了（TiCrZrNb）C - SiC多相陶瓷。在本研究中，系统地研究了球磨方法对多相高熵陶瓷微观结构和力学性能的影响。与D - HECs - 1900相比，W - HECs - 1900具有更均匀的元素分布和更小的晶粒尺寸，平均晶粒尺寸为1.8μm，维氏硬度更高，HV = 2178.41 kg/mm，断裂韧性更高，K = 4.42 MPa·m。W - HECs - 1900还表现出更好的耐磨性，磨损率为1.01×10⁻⁶mm³·N⁻¹·m⁻¹。摩擦过程中形成的氧化摩擦层有利于减少摩擦磨损，使W - HECs - 1900成为一种潜在的耐磨材料。