| Authors: |
Chang-Jiu Li* / Xi'an Jiaotong University, P.R. China
Jun Wang / State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xian Jiaotong University, China
Gun-Jun Yang/ State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xian Jiaotong University, China
Cheng-Xin Li/ State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xian Jiaotong University, China
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| Abstract: |
The properties and performances of plasma spray coatings depends on the coating-substrate interface adhesion and the splat-splat interface cohesion. During atmospheric plasma spraying of metal alloy, oxidation inevitably occurs, leading to formation of oxide layers in the metallic splat-splat interfaces and affecting significantly the coating cohesion. In this study stainless steel splats are deposited on preheated stainless steel substrates with different oxide thicknesses in both ambient atmosphere and inert low pressure spay (LPPS) condition to examine the effects of particle and substrate oxidation on splat morphology, microstructure and splat-substrate interface bonding. The stainless substrate was preheated to 350oC before splat deposition. The splat morphology, microstructure, splat-substrate interface bonding were characterized by scanning electron microscopy (SEM). The splat samples for examination of the interface bonding were prepared by FIB. The interface bonding state of typical splats was characterized by HR-TEM.
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