氧化铝陶瓷涂层的组织与相结构分析  

Analysis on Microstructure and Phase Structure of Al_2O_3 Ceramic Coating

作　　者：吴华[1] 宫文彪[2] 

机构地区：[1]常州机电职业技术学院模具技术系,江苏常州213164 [2]长春工业大学材料科学与工程学院,吉林长春130012

出　　处：《热处理技术与装备》2009年第6期29-31,共3页Heat Treatment Technology and Equipment

摘　　要：本文利用等离子喷涂设备,制备了以镍包铝粉末作为打底层,以N i60混合不同重量百分比的A l2O3陶瓷粉末作为工作涂层的不同试样,通过扫描电镜、X射线衍射仪、显微硬度计和VIDAS图像分析仪等仪器,研究了涂层的组织和相结构,结果表明,涂层为N i奥氏体相上弥散分布N i3B、N iB、Cr3B、Cr23B6等硬质相,另一硬质相A l2O3则主要以亚稳相-γA l2O3存在,且涂层相结构不单一,为N i基晶态/非晶态结构。In this paper,the microstructure and phase structure is investigated by SEM,X-ray diffraction analyzer and VIDAS system etc.The sample is prepared by the plasma sprayed Al2O3 ceramic coating with Ni-Cr-B-Si as matrix.The results show that Ni3B,NiB,CrB,Cr3B5 and Cr23C6 etc.hard phases are diffusely distributed in coating of austenite phase with Ni,and another hard phase Al2O3 exist mainly in the coating with γ-Al2O3 metastable phase,and the phase structure of coating does not be single,but the Ni-based crystalline/amorphous structure.

关 键 词：等离子喷涂 陶瓷涂层 相结构 

分 类 号：TG174[金属学及工艺—金属表面处理]