摘要
利用超声显微镜(Acoustic m icroscope)观察了大气等离子喷涂Al2O3-40% ZrO2 涂层的磨损过程,研究了塑性材料和脆性材料在磨损机理方面的差别,并通过扫描电子显微镜对其结果加以验证.
Scanning acoustic microscope (SAM) is effective in acquiring the information about subsurface of samples nondestructively. Due to its pronounced nondestruction and subsurface detecting capability,SAM has been finding a wide range of application in materials science and biology. In order to enlarge the application spectrum of SAM, research of wear of materials by SAM has been conducted. A reflection type SAM with a frequency of 150 MHz was used to observe the wear process of atmospherically plasma sprayed Al 2O 3 40%ZrO 2 ceramic coatings and compare the wear mechanisms of ceramic coatings (Cr 2O 3, ZrO 2 8%Y 2O 3) and metal alloy (N + implanted Cr Mo V steel), which are typical brittle material and plastic material, respectively. These results could be helpful to understand the wear mechanisms of materials. The SAM results have been testified by SEM observation.
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
1999年第4期294-298,共5页
Tribology
基金
国家自然科学基金!(59775039)
关键词
超声显微镜
微裂纹
缺陷
磨损机理
材料
scanning acoustic microscope
microcracks
defects
wear mechanism