Microstructure and Property of NiCoCrAlYTa Coatings Prepared by Different Thermal Spraying Technology
MAO Jie, DENG Chunming, WU Xiangbin, DENG Changguang, SONG Jinbing, LIU Min
The Key Lab of Guangdong for Modern Surface Engineering Technology, National Engineering Laboratory for Modern Materials Surface Engineering Technology, Guangdong Institute of New Materials, Guangzhou 510651
Abstract: To explore the influence of different thermal spraying processes on the microstructure and properties of NiCoCr-AlYTa coatings and determine the optimal parameters, the NiCoCrAlYTa coatings were obtained on the single crystal superalloy substrate by air-plasma spraying (APS), low-pressure plasma spraying (LPPS), high velocity oxygen-fuel spraying (HVOF) and low temperature high velocity oxygen fuel (LT-HVOF) methods. The phase compositions, microstructure and micro-hardness of all coa-tings were characterized by XRD, SEM and micro-hardness tester. The same phase composition of γ′-Ni3Al,β-NiAl and γ-Ni solid solution were proved in NiCoCrAlYTa coatings under different spraying methods. The coatings prepared by LPPS, HVOF (LT-HVOF inclued) are dense and of low porosity, among which the porosity of HVOF (LT-HVOF included) coating is less than 1%. Oxygen content is low in LPPS and LT-HVOF coatings, and which is controlled in the range of 0.3% to 0.6%. Generally, LT-HVOF process is the optimum choice for depositing NiCoCrAlYTa coating with dense structure, very low porosity and oxygen content.
毛杰, 邓春明, 吴相彬, 邓畅光, 宋进兵, 刘敏. 不同喷涂工艺下NiCoCrAlYTa涂层的显微结构和性能*[J]. 《材料导报》期刊社, 2017, 31(16): 51-54.
MAO Jie, DENG Chunming, WU Xiangbin, DENG Changguang, SONG Jinbing, LIU Min. Microstructure and Property of NiCoCrAlYTa Coatings Prepared by Different Thermal Spraying Technology. Materials Reports, 2017, 31(16): 51-54.
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2017, Vol. 31 
