【作者】 刘明； 徐利华； 张海潮； 徐斌； 杜玉峰； 王体壮；

【Author】 Liu Ming Xu Lihua Zhang Haichao Xu Bin Du Yufeng Wang TizhuangDepartment of Inorganic Materials, University of Science and Technology Beijing,Beijing, 100083 Institute of System Engineering,Huazhong Universityof Science and Technology,Wuhan,430074 Luoyang Helisi High-temp Structure Ceramic Co. ,Ltd. ,Luoyang,471003

【机构】 北京科技大学无机非金属材料系； 华中科技大学系统工程研究所； 洛阳和利斯高温结构陶瓷有限公司；

【摘要】 本文以氧化铝粉末为原料,采用水溶性注浆成形制备高耐磨氧化铝材料。为减少实验工作量,采用正交设计的方法来优化制备高品质注浆料,并研究了掺杂分散剂后Zeta电位的变化。同时,还对氧化铝陶瓷烧结体的显微结构、力学性能和耐磨机理进行研究。结果表明,当氧化铝浆料中固相体积分数为50%时,可制得体积密度较高的精细氧化铝陶瓷材料,断裂韧性可达3.30 MPa·m1/2,硬度为11.05 GPa。通过抗磨损实验研究表明:氧化铝陶瓷干摩擦条件下的磨损机理主要为脆性断裂和磨粒磨损;而水润滑条件下磨损机理主要是发生了摩擦化学磨损。更多还原

【Abstract】 In this paper, advanced alumina ceramics with high wear resistance are fabricated by colloidal process. To decrease the workloads, the orthogonal design is used to optimize the technology in this research. Furthermore, the change of Zeta potential after adding dispersant, the micro-structure, mechanics performance and wear resistant mechanism of sintered body are studied. The results indicate that high density of green compact could be attained while the volume fraction of solid powders is equal to 50% ,the relevant fracture toughness is 3.30 MPa·m1/2 and the hardness value is 11.05GPa. Also, the friction and wear test shows that the wear mechanism displays a behavior of brittle fracture and abrasive wear under drying wear, whereas the other one exhibits a mode of chemical frictional wear under water lubrication wear.更多还原