文献类型：期刊文献

英文题名：(Hf,Zr,W,Mo,Ti)B₂ High-Entropy Boride Ceramics Fabricated by Boro/Carbothermal Reduction Method Combined with SPS

作者：Ni, Boyu[1];Zhang, Yan[1,2];Zou, Hui[1];Liu, Shuangyu[1];Shan, Lei[1];Shi, Haiyan[3];Lv, Zhaoyu[3];He, Zehao[3]

机构：[1]Shaoxing Univ, Sch Mech & Elect Engn, Shaoxing Key Lab Mech Components Surface & Interfa, Shaoxing 312000, Peoples R China;[2]Tianjin Univ, Sch Mech & Elect Engn, Tianjin 300072, Peoples R China;[3]Zhejiang Fengqiu Kerui Pump Ind Ltd Co, Dept Gynecol, Zhuji 311800, Peoples R China

年份：2024

外文期刊名：JOM

收录：SCI-EXPANDED(收录号：WOS:001294961400001)、、WOS

基金：This work was financially supported by the Basic public welfare program projects in Shaoxing city (No. 2023A11005), Zhuji "Reveal the list and take charge" project (No. 2022J24)

语种：英文

外文摘要：In order to further improve the density and properties of high-entropy boride ceramics, (Hf,Zr,W,Mo,Ti)B-2 high-entropy boride ceramics were prepared by boro/carbothermal reduction combined with SPS. The phase composition, microstructure, and mechanical properties of the ceramics were studied, and the results showed that (Hf,Zr,W,Mo,Ti)B-2 high-entropy boride powder contained a highentropy phase, an oxides impurities phase, a WB phase, and a HfB2 phase at 1600 degrees C. After sintering at 2000 degrees C, there was no oxide impurity in the (Hf,Zr,W,Mo,Ti)B-2 high-entropy boride ceramics, which consisted of a high-entropy phase and a small amount of WB second phase. The hardness and fracture toughness were 29.9 +/- 1.0 GPa and 3.36 +/- 0.21 MPam(1/2), respectively. The hardness was higher than the high-entropy boride ceramics with the same components prepared by in situ reactive sintering and borothermal reduction. The mechanical properties of the high-entropy ceramics obtained by boro/carbothermal reduction was excellent. and were higher than those reported in the literature of the same component.