Al_2O_3/WC-10Co/ZrO_2/Ni金属陶瓷的微波烧结  

Microwave sintering of Al_2O_3/WC-10Co/ZrO_2/Ni cermets

作　　者：史晓亮[1] 杨华[1] 邵刚勤[1] 段兴龙[1] 熊震[1] 

机构地区：[1]武汉理工大学材料复合新技术国家重点实验室,湖北武汉430070

出　　处：《中南大学学报（自然科学版）》2007年第4期623-628,共6页Journal of Central South University:Science and Technology

基　　金：教育部科学技术重点研究项目(105123);武汉理工大学基金资助项目(xjj2005166)

摘　　要：以纳米WC-10Co复合粉末、YSZ纳米粉末、Al2O3亚微粉末与工业Ni粉为原料,采用微波烧结+热等静压处理制备性能优良的Al2O3/WC-10Co/ZrO2/Ni金属陶瓷,研究微波烧结、微波烧结+热等静压处理对Al2O3/WC-10Co/ZrO2/Ni金属陶瓷的组织结构和力学性能的影响。研究结果表明:WC-10Co(10%,质量分数),YSZ(30%),Al2O3(55%)与Ni(5%)复合粉末高能球磨后,经过微波烧结+热等静压处理,可以得到平均晶粒度小于1.5μm的整体性能较好的亚微Al2O3/WC-10Co/ZrO2/Ni金属陶瓷,其相对密度为98.4%,洛氏硬度为HRA 94.0;微波烧结+热等静压可以有效地消除微波烧结造成Al2O3/WC-10Co/ZrO2/Ni金属陶瓷中的孔隙,提高复合材料的密实度和力学性能,而且金属陶瓷的晶粒基本没有异常长大。Using the microwave sintering and hot isostatic pressing （HIP） technology, the sintering properties of nanocrystalline WC-10Co（10%, mass fraction）, Y2O3 stabilized nanocrystalline ZRO2（30%）, submicron Al2O3（55%） and nickel（5%） composite powder in microwave sintering were studied. The results show that after Al2O3/WC-10Co/ZrO2/Ni cermets are sintered by microwave sintering and hot isostatic pressing, the relative density and Rockwell hardness of cermets with average grain size of less than 1.5 μm are 98.4% and 94.0, respectively, Submicron Al2O3/WC-10Co/ZrO2/Ni cermets have excellent properties, The sintering body sintered by using microwave sintering and HIP can not only increase the density of specimen and lower the porosity, but also avoid discontinuous grain growth.

关 键 词：WC-10Co纳米复合粉末 亚微Al2O3粉末 纳米ZrO2粉末 微波烧结 热等静压处理 

分 类 号：TF125.3[冶金工程—粉末冶金]