Effect of erbium doping on phase composition, mechanical and thermal properties of ZrO_(2)-based ceramics

作     者：Zheng Cao Shengli An Xiwen Song Zheng Cao;Shengli An;Xiwen Song

作者机构：School of Metallurgy and Ecological EngineeringUniversity of Science and Technology BeijingBeijing 100083China Inner Mongolia Key Laboratory of Advanced Ceramic Materials and DevicesInner Mongolia University of Science and TechnologyBaotou O14010China School of Materials and MetallurgyInner Mongolia University of Science and TechnologyBaotou 014010China 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2022年第40卷第10期

页      面：1628-1634页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 

基　　金：Project supported by the National High Technology Research and Development Program of China(2015AA034403) the National Natural Science Foundation of China(Grant No.51762036) 

主　　题：Er_(2)O_(3) Phase composition Vickers hardness Fracture toughness Thermal conductivity Rare earths 

摘      要：Er_(x)Ti_(0.1)Zr_(0.9-x)O_(2-1.5 x)(x=0.04,0.05,0.06,0.07,0.08) ceramics were synthesized by a solid-state reaction *** influence of the Er^(3+) addition on the phase composition,Vickers hardness,fracture toughness,and thermal conductivity of this ceramic material was *** X-ray diffraction results reveal that the c-ZrO_(2) content increases from 1.85 vol% to 33.89 vol%,and the percentage of t-ZrO_(2) decreases from 98.15 vol% to 66.11 vol% with the increase in Er^(3+) content from 4 mol% to 8 mol%.Moreover,the addition of Er^(3+) is beneficial to the volume expansion of the unit *** the same time,the incorporation of Er^(3+) weakens the coordination of oxygen ions around the metal cations,resulting in a corresponding decrease in the tetragonality of the t-ZrO_(2).The Vickers hardness and fracture toughness of the Er_(x)Ti_(0.1)Zr_(0.9-x)O_(2-1.5)_(x) ceramics show increasing and decreasing trends,*** thermal conductivity has a significant decline due to point defects caused by the Er^(3+) *** 8 ETZ ceramic exhibits the highest Vickers hardness(12.7 GPa),the lowest fracture toughness(7.6 MPa·m^(1/2)),and the lowest average thermal conductivity(1.85 W/(m·K)) in the temperature range of 200-1000℃.All of the above properties are higher than those of the Y_(2)O_(3)-stabilized ZrO_(2) ceramic.