Deposition Mechanisms of Cold Gas Dynamic Sprayed MCrAlY Coatings
Thermal-sprayed (i.e. LPPS or HVOF) MCrAlY coatings are widely used for land-based gas turbine applications against high-temperature oxidation and hot corrosion. However, due to requirement for further improvement of turbine efficiency, dense and stable coatings are necessary. The cold spray (also referred to as cold gas dynamic spray) makes it possible increase coating density, due to high velocity particle impact during spraying. However, deposition mechanisms of cold spraying have not been elucidated yet. In this study, we investigated the deposition mechanisms focused on the behavior of interface between a coating and a substrate. The mechanisms were evaluated by the spray impact phenomena simulation tests, namely laser shock flier impact tests, and STEM-EDX elemental analyses at the interface between the substrate and the cold sprayed coating. From the results STEM-EDX for as-sprayed coating and of SEM-EDX of the flier specimen, the bonding between the CoNiCrAlY coating and the substrate occurred at the only particular phase combination.
Y. Ichikawa K. Sakaguchi K. Ogawa T. Shoji S. Barradas M. Jeandin M. Boustie
Fracture and Reliability Research Institute, Tohoku University, Sendai, Japan Ecole Nationale Supérieure des Mines de Paris, C2P-Center for Plasma Processing, Evry, France Laboratoire de Combustion et de Détonique, Ecole Nationale Supérieure de Mécanique et dAérotechniqu
国际会议
北京
英文
2007-05-14（万方平台首次上网日期，不代表论文的发表时间）