Synthesis of(HfZrTiNbTa)N powders via nitride thermal reduction with soft mechano-chemical assistance

作     者：Xiang Liu Youjun Lu Qian Xu Lutong Yang Hongfang Shen Wenzhou Sun Xiao Zhang Yanmin Wang 

作者机构：School of Materials Science&EngineeringNorth Minzu UniversityYinchuan 750021China College of Materials Science&EngineeringSouth China University of TechnologyGuangzhou 510641China 

出 版 物：《Journal of Advanced Ceramics》 (先进陶瓷（英文）)

年 卷 期：2023年第12卷第3期

页      面：565-577页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070205[理学-凝聚态物理] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 070301[理学-无机化学] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(Nos.51662002,51762002,and 52104358) Graduate Student Innovation Program(No.YCX22138) the Key Research and Development Program of Ningxia,China(No.2019BFH02021) 

主　　题：soft mechanochemistry thermal reduction high-entropy nitride powders high-entropy nitrideceramics 

摘      要：High-entropy nitride powders are one of prerequisite materials for the preparation of high-performance high-entropy nitride *** this paper,high-entropy(HfZrTiNbTa)N powders were synthesized via nitride(i.e.,silicon nitride(Si_(3)N_(4)))thermal reduction with soft mechanochemical *** results show that metal oxides like hafnium dioxide(HfO_(2)),zirconium dioxide(ZrO_(2)),titanium dioxide(TiO_(2)),niobium pentoxide(Nb_(2)O_(5)),and tantalum pentoxide(Ta_(2)O_(5))can all be transformed into the corresponding metal nitrides in the presence of Si_(3)N_(4)at 1700℃,and solid solution of the metal nitrides can be formed as the temperature increases to 2100℃.The high-entropy(HfZrTiNbTa)N powders with submicron-sized particles,a narrower size distribution,and a single face-centered cubic(fcc)structure are obtained from raw material mixtures ground for 10 h and subsequently sintered at 1800℃.In addition,the high-entropy bulk nitride ceramics with relative density(Rw)of 94.31%±0.76%,Vickers hardness of 21.00±0.94 GPa,and fracture toughness(KIC)of 3.18±0.16 MPa·m1/2 are obtained with submicron-sized powders,which are superior to those obtained with micron-sized powders.