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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摘要为了使航天发动机中镍合金在高温,高压,富氧条件下安全高效地工作,以镍粉及玻璃相为原料制成料浆,采用流涂法在航天发动机用镍基合金GH4586表面制备高温含镍的B₂O₃-A1₂O₃-BaO-CeO₂-ZrO₂(Ni/BACZ)金属陶瓷涂层。通过扫描电镜和X射线衍射分析涂层的表面和截面组织形貌以及相组成,采用拉伸实验、氧化试验和热震实验分析涂层性能。结果表明：Ni/BACZ涂层结构致密,主要物相为Ni、Al₂O₃和CeBO₃。涂层与基体结合牢固,结合强度大于55 MPa。900 ℃氧化条件下,涂层的抗氧化性能相比无涂层基体提高7倍以上。Ni可减少涂层高温热应力产生的裂纹,增加涂层韧性,使其具有良好的抗热震性能。

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	高波
	曾凡浩
	古一
	李漪

关键词 ： GH4586材料, 金属陶瓷涂层, 结合强度, 抗氧化, 抗热震

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

收稿日期: 2018-03-03 出版日期: 2019-07-12

ZTFLH:

TG178

基金资助:湖南省自然科学基金资助项目(2018JJ2507)

通讯作者: 曾凡浩,副教授,博士;电话：0731-88877880;E-mail: zengfanhao608@csu.edu.cn

引用本文:

高波, 曾凡浩, 古一, 李漪. 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[J]. 粉末冶金材料科学与工程, 2018, 23(5): 527-533.
GAO Bo, ZENG Fanhao, GU Yi, LI Yi. Bonding and anti-oxidation properties of cermet composite coatings with Ni on surface of nickel-based superalloy for aviation engines. Materials Science and Engineering of Powder Metallurgy, 2018, 23(5): 527-533.

链接本文:

http://pmbjb.csu.edu.cn/CN/ 或 http://pmbjb.csu.edu.cn/CN/Y2018/V23/I5/527

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