Co-Cr-Mo合金和ZrO_2共烧结及其制品性能  

Behaviour and product performance of co-sintering Co-Cr-Mo alloy and ZrO_2

作　　者：刘剑敏[1] 李益民[1] 何浩[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,长沙410083

出　　处：《粉末冶金材料科学与工程》2014年第4期559-564,共6页Materials Science and Engineering of Powder Metallurgy

基　　金：国家自然科学基金资助项目(51075405);国家自然科学基金创新群体项目(50721003)

摘　　要：为获得界面结合良好的Co-Cr-Mo合金/ZrO2连接,研究不同孔隙度的Co-Cr-Mo合金和ZrO2陶瓷分别在1 300、1 350、1 400℃下的单组元烧结行为以及Co-Cr-Mo合金与ZrO2的共烧结行为。测定烧结试样的密度与抗弯强度,利用扫描电镜（SEM）分析Co-Cr-Mo/ZrO2界面元素分布。结果表明：低孔隙度的Co-Cr-Mo合金收缩更快,因而可通过控制Co-Cr-Mo合金的孔隙度来控制其收缩,使其与ZrO2的收缩行为相近;随烧结温度升高,界面结合强度增加;相同温度下高孔隙度的Co-Cr-Mo与ZrO2的界面结合强度比低孔隙度的Co-Cr-Mo与ZrO2的界面结合强度大,1 400℃下烧结2 h,其界面结合强度达到35.06 MPa;随烧结温度升高和Co-Cr-Mo合金孔隙度增加,Co-Cr-Mo合金/ZrO2界面处的孔隙和裂纹减少,同时在垂直于界面方向存在1个1~2μm厚度的元素扩散区域。In order to obtain excellent interface bonding of Co-Cr-Mo alloy/ZrO2 joint, one-component sintering behavior of different porosity Co-Cr-Mo alloy and ZrO2 as well as co-sintering behavior of different porosity Co-Cr-Mo alloy/ZrO2 at 1 300, 1 350 and 1 400 ℃ respectively were investigated. The density and bending strength of materials were measured. Scanning electron microscopy（SEM） was employed to investigate the distribution of interface elements. The results show that, low porosity Co-Cr-Mo alloy shrinks faster than high porosity Co-Cr-Mo alloy, so the shrinkage of Co-Cr-Mo alloy can be controlled by means of controlling porosity to make Co-Cr-Mo alloy and ZrO2 have similar shrinkage behavior; the strength of interface bonding increases with increasing sintering temperature and the interface bonding strength of high porosity Co-Cr-Mo alloy/ZrO2 is greater than that of low porosity Co-Cr-Mo alloy/ZrO2 at the same temperature and the interface bonding strength of high porosity Co-Cr-Mo alloy/ZrO2 can reache 35.06 MPa when sintered at 1 400 ℃ for 2 h, The porosity and crack of Co-Cr-Mo alloy/ZrO2 interface decrease with increasing sintering temperature and Co-Cr-Mo alloy porosity, at the same time on the longitudinal-section perpendicular to the Co-Cr-Mo alloy/ZrO2 interface there is a 1~2 μm elements diffusion region.

关 键 词：共烧结 钴铬钼合金 氧化锆 界面结合强度 

分 类 号：TF124[冶金工程—粉末冶金]