【摘要】 采用原位化学工艺制备了ZrO2/Cu纳米复合粉末,用粉末冶金法制备了纳米ZrO2/Cu复合材料.通过TEM观察发现,氧化锆呈单斜和四方两种晶型,不同晶体形态的氧化锆颗粒与铜基体之间具有不同的界面特征.通过Ansys分析软件对不同形态即不同晶型氧化锆与铜基体的界面进行应力模拟分析,结果发现单斜晶型氧化锆的尖端部位很容易产生应力集中,且比四方晶型氧化锆界面处更容易产生裂纹.更多还原

【Abstract】 ZrO₂/Cu composite powder was prepared by in-situ chemical route, with which a nano ZrO₂/Cu composite material was prepared by powder metallurgy. TEM observation reveals that there are two crystal types of tetragonal and monoclinic Zirconia particles, and different interfacial characterizations exist between the different zirconia particles and copper matrix. With Ansys software, interfacial stress was simulated in zirconia with different crystal structures and copper matrix. The results show that the stress is easily concentrated in the tip of monoclinic Zirconia particles and cracks are easily brought than the tetragonal zirconia interface.更多还原