航天发动机用GH4586镍合金表面含镍金属陶瓷涂层的结合与抗氧化性能

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Abstract In order to make the nickel alloy used in aerospace engine work safely and efficiently under the conditions of high temperature, high pressure and oxygen enrichment. A new Ni/cermet coating containing B₂O₃-A1₂O₃- BaO-CeO₂-ZrO₂ (Ni/BACZ) were prepared on GH4586 nickel-based alloy by slurry method. The surface and cross section morphologies and the phase composition of the coating were analyzed by SEM and XRD respectively. The properties of coating were analyzed by the stretching test, oxidation test and thermal shock experiment. The results show that the structure of Ni/BACZ coating is compact and solid with the matrix, and the main phases are Ni, Al₂O₃ and CeBO₃. The coating is firmly combined with the matrix, and the tensile strength is more than 55 MPa. Furthermore, the oxidation resistance of GH4586 nickel-base alloy with cermet coating is improved 7 times than that of the uncoated alloy at 900 ℃. Ni can reduce the coating cracks produced by the high temperature thermal stress, improve the toughness of the coating so that it has a great thermal shock resistance.

Key words： GH4586 material metal cermet coating bonding strength anti-oxidation thermal shock resistance

Received: 03 March 2018 Published: 12 July 2019

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	GAO Bo
	ZENG Fanhao
	GU Yi
	LI Yi

Cite this article:

GAO Bo,ZENG Fanhao,GU Yi, et al. Bonding and anti-oxidation properties of cermet composite coatings with Ni on surface of nickel-based superalloy for aviation engines[J]. Materials Science and Engineering of Powder Metallurgy, 2018, 23(5): 527-533.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2018/V23/I5/527

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