摘要
在5.0 GPa及1500~2000℃的压力和温度条件下,采用高压烧结的方法制备了B4C含量分别为10%和30%的TiB2-B4C陶瓷复合材料。对TiB2-B4C陶瓷复合材料的物相、显微结构、密度、硬度、热导率、电阻率等进行了分析。结果表明:材料在高压下没有发现化学反应生成新的相;TiB2-B4C陶瓷复合材料具有较高的致密性,没有明显的气孔;TiB2-30%B4C在1800℃下硬度最高,在4.9 N载荷下可达27.8 GPa,在9.8 N载荷下可达24.3 GPa;在常温下,热导率可达30.42 W/(m·K)。
TiB2-B4C ceramic composite with B4C content of 10wt%and 30wt%were sintered by high pressure method at the pressure of 5.0 GPa and the temperature of 1500-2000℃.The phase composition,microstructure,density,hardness,thermal conductivity and electrical resistivity of TiB2-B4C ceramic composites were analyzed.The results show that,the ceramic composites does not find a chemical reaction to form a new phase under high pressure condition.TiB2-B4C ceramic composites has high density and no obvious pores.TiB2-30wt%B4C has the highest hardness at 1800℃,it can reach 27.8 GPa and 24.3 GPa with the loads of 4.9 N and 9.8 N,respectively.Its thermal conductivity can reach 30.42 W/(m·K)at room temperature.
作者
刘明明
胡美华
毕宁
高广进
李尚升
宿太超
杜景阳
尤悦
LIU Mingming;HU Meihua;BI Ning;GAO Guangjin;LI Shangsheng;SU Taichao;DU Jingyang;YOU Yue(School of Material Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China;School of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454000, China)
出处
《硅酸盐通报》
CAS
北大核心
2020年第3期910-915,共6页
Bulletin of the Chinese Ceramic Society
基金
国家自然科学基金(61505049,U1704148)
河南省教育厅项目(17A430020,18A430017)。
