| REAEARCH PAPER |
|
|
|
|
|
| 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.
|
|
Published: 25 August 2017
Online: 2018-05-07
|
|
|
|
|
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. |
|
|
|
渝公网安备50019002502923号 © Editorial Office of Materials Reports.
2017, Vol. 31 
