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.
1 Nicholls J R. Advances in coating design for high-performance gas turbines [J]. MRS Bull, 2003, 28(9): 659. 2 Wang Xinyue, Xin Li, Wei Hua, et al. Progress of high-temperature protective coatings [J]. Corros Sci Protect Technol,2013,25(3):175(in Chinese). 王心悦, 辛丽, 韦华, 等. 高温防护涂层研究进展 [J]. 腐蚀科学与防护技术,2013,25(3):175. 3 Ray A K, Goswami B, Singh M P, et al. Characterization of bond coat in a thermal barrier coated superalloy used in combustor liners of aero engines [J]. Mater Charact,2006,57(3):199. 4 Huntz A M. Influence of active elements on the oxidation mechanism of MCrAl alloys [J]. Mater Sci Eng,1987,87(1-2):251. 5 Zhou Hong, Li Fei, He Bo, et al. Research progresses in materials for thermal barrier coatings [J]. Mater Rev,2006,20(10):40(in Chinese). 周洪, 李飞,何博,等.热障涂层材料研究进展[J]. 材料导报,2006,20(10):40. 6 Luo Shun. Protection properties of MCrAlY coating on Ni-based single crystal superalloy [D]. Changsha: Central South University,2009(in Chinese). 罗顺. 镍基单晶合金 MCrAlY 涂层防护性能研究[D]. 长沙: 中南大学,2009. 7 Zhao L, Parco M, Lugscheider E. High velocity oxy-fuel thermal spraying of a NiCoCrAlY alloy [J]. Surf Coat Technol,2004,179(2):272. 8 Zhou Kesong, Liang Xinghua, Liu Min, et al. Oxidation kinetics of NiCoCrAlYTa coating by low pressure plasma spraying [J]. Chin J Nonferr Metals,2009,19(3):490(in Chinese). 周克崧, 梁兴华, 刘敏, 等. 低压等离子喷涂 NiCoCrAlYTa 涂层的氧化动力学[J]. 中国有色金属学报,2009,19(3):490. 9 Deng Chunming, Deng Changguang, Kuang Min, et al. Microstructure and properties of NiCoCrAlYTa coatings prepared by low pressure plasma and supersonic flame spraying [J]. Mater Protect,2011,44(1):52(in Chinese). 邓春明, 邓畅光, 况敏, 等. 低压等离子和超音速火焰喷涂NiCoCrAlYTa层的结构和性能 [J]. 材料保护,2011,44(1):52. 10 Richer P, Yandouzi M, Beauvais L, et al. Oxidation behaviour of CoNiCrAlY bond coats produced by plasma, HVOF and cold gas dynamic spraying [J]. Surf Coat Technol,2010,204(24):3962. 11 Kawakita J, Kuroda S, Krebs S, et al. In-situ densification of Ti coatings by the warm spray (two-stage HVOF) process [J]. Mater Trans,2006,47(7):1631. 12 Zhou Kesong, Deng Chunming, Deng Changguang, et al. Microstructure and phase composition of Ti-Ni coating prepared by low-temperature high velocity oxygen fuel spraying and of the same coa-ting after laser treatment [J]. Mater Protect,2009(8):62(in Chinese). 周克崧, 邓春明, 邓畅光, 等. Ti-Ni 低温超音速火焰喷涂层及激光处理后的特征[J]. 材料保护,2009(8):62.