摘要
以自制的高纯Cr2Al C陶瓷粉体和工业纯铜为原料,采用冷压真空烧结技术制备了Cu-15%Cr2Al C(体积分数)复合材料。通过正交优化试验探讨了压制压力、烧结时间及烧结温度对复合材料相对密度、显微硬度的影响,并对复合材料组织进行扫面电镜分析。结果表明:压制压力对复合材料性能的影响大于烧结时间和烧结温度;随着压制压力的增加,复合材料的相对密度和显微硬度逐渐升高;Cr2Al C颗粒弥散分布于Cu基体中;压制压力为500发MPa,烧结时间为1 h,烧结温度为1 000℃,密度为6.91 g/cm3,相对密度达到97.26%,显微硬度为158.93 HV,压溃强度为280 MPa。
The Cu-15vol% Cr2 AlC （Volume fraction） composite was prepared by cold-pressing vacuum sintering method using homemade high purity Cr2AlC ceramic powder and industrial pure copper as raw material. The effect of test pressure, sintering time and sintering temperature on the relative density and the microhardness of the composite were discussed through orthogonal optimization ,and the composite microstructure was analyzed by Scanning electron microscopy . The results show that the effect of the compacting pressure on the properties of composite is greater than the sintering time and sintering temperature. The relative density and microhardness of composite increase with increasing of pressing stress. The Cr2AlC particles are dispersed in the Cu matrix. The density is 6.91 g/cm^3 , the relative density is 97.26% and the microhardness is 158.93 HV,the compression strength is 280 MPa, when using pressure of 500 MPa, holding time of lh and sintering temperature of 1 000 ℃.
出处
《粉末冶金技术》
CAS
CSCD
北大核心
2015年第5期359-364,共6页
Powder Metallurgy Technology
基金
教育部春晖计划资助项目(Z2010096)
西华大学创新基金项目资助(ycjj201259)
