摘要
以放电等离子烧结法(spark plasma sintering,SPS)分别在1700℃和1900℃烧结制备Zr B2-20%Si C(ZS)复合陶瓷(分别简称为ZS1700和ZS1900),通过分析两种陶瓷的SEM、EDS、硬度、断裂韧度、高温弯曲强度、氧化增重和氧化截面等,研究烧结温度对ZS复合陶瓷微观结构、力学性能和抗氧化性能的影响。结果表明:烧结温度由1700℃提升至1900℃,ZS陶瓷晶粒长大,致密度由98%提高至99.8%,硬度由12.6 GPa提高至14.7 GPa;1600℃弯曲强度由101 MPa提高至286 MPa,1800℃弯曲强度由138 MPa提高至302 MPa,高温弯曲强度显著提高;与ZS1700相比,ZS1900在1500℃空气中的氧化深度小,基体中氧渗入量较少,抗氧化性能有一定提升。
Two ZrB2-20%(volume fraction)SiC(ZS)ceramics were sintered successfully by spark plasma sintering(SPS)process at 1700℃and 1900℃respectively.The SEM,EDS,hardness,fracture toughness,bending strength,mass gain and cross section of oxidized ceramics were analyzed to investigate the effect of sintering temperature on microstructure,mechanical properties and oxidation resistance of ZS ceramic.The results show that the grain size and relative density of ZS ceramic are increased with the increase of sintering temperature.When the sintering temperature is raised from 1700℃to 1900℃,the density increases from 98%to 99.8%and the hardness increases from 12.6 GPa to 14.7 GPa.With the increase of sintering temperature form 1700℃to 1900℃,the bending strength at 1600℃increases from 101 MPa to 286 MPa,and the bending strength at 1800℃increases from 138 MPa to 302 MPa.The oxidation behaviours of the two ceramics at 1500℃in air are also investigated.The oxidation depth of ZS ceramic sintered at 1900℃is smaller,and the infiltration of O into the substrate is less,which indicates that the oxidation resistance of ZS ceramic sintered at 1900℃is improved.
作者
李麒
郭丰伟
曹腊梅
益小苏
LI Qi;GUO Fengwei;CAO Lamei;YI Xiaosu(Science and Technology on Advanced High Temperature Structural Materials Laboratory,AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China;Science and Technology on Advanced Composites Laboratory,AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China)
出处
《航空材料学报》
EI
CAS
CSCD
北大核心
2018年第4期87-92,共6页
Journal of Aeronautical Materials
基金
国家国际科技合作专项(L2015RR0116)
作者简介
通讯作者:李麒(1988—),女,博士,工程师,研究方向为超高温陶瓷及其复合材料,(E-mail)liqi1988china@126.com。
