两种NiCrAlY涂层1050℃恒温抗氧化性能

中国腐蚀与防护学报

2002, Vol. 22

Issue (6): 339-342

研究报告

本期目录 | 过刊浏览

两种NiCrAlY涂层1050℃恒温抗氧化性能

张玉娟;孙晓峰;金涛

中国科学院金属研究所

1050℃ ISOTHERMAL OXIDATION RESISTANCE OF TWO NiCrAlY COATINGS

Yujuan Zhang;Xiaofeng Sun;Tao Jin

中国科学院金属研究所

全文: PDF(214 KB)

摘要: 用低压等离子喷涂(LPPS)和爆炸喷涂(DS)方法，在镍基单晶高温合金上制备NiCrAlY涂层.涂层在1050℃恒温氧化300 h，借助XRD、SEM和EDS，对涂层表面氧化膜进行分析，检测其恒温抗氧化能力.结果表明两种涂层表面均能形成Al2O3保护膜，二者的氧化动力学曲线均符合抛物线规律.DS涂层的微孔内含残留气体，涂层内氧化严重，氧化增重大，氧化速率常数近似LPPS涂层的二倍.氧化300 h后，DS涂层表面边角处氧化膜有少量剥落，而LPPS涂层保持完好，只在个别突起处有微小开裂.

关键词 ：爆炸喷涂, 低压等离子喷涂, NiCrAlY涂层, 抗氧

Abstract：NiCrAlY coatings,respectively prepared by detonatio n spray (DS)and low-pressure plasma spray (LPPS),were deposited on a single crys tal Ni-base superalloy.Specimens were isothermally oxidized at 1050℃ for 300h.B y means of XRD,SEM and EDS,oxidation behaviors of the coatings were analyzed.The results showed that Al2O3 protective scale was formed on both DS NiCrAlY co ating and LPPS NiCrAlY coating.Their oxidation kinetics obeyed the parabolic law .Since DS coating entrapped the air,its internal oxide appeared earlier and much more than that of LPPS coating,which lead to a relatively rapid weight gain.The oxidation rate constant of DS NiCrAlY coating is about two times of that of LPP S coating.Some spallation occurred on the oxide scale of DS coating after oxidiz ed for 300 hours,while the oxide scale of LPPS coating kept almost intact except for a few microcracks on the protuberances.

Key words： DS LPPS NiCrAlY coating oxidation resistance

收稿日期: 2002-04-28

ZTFLH:

TG174.44

通讯作者: 张玉娟 E-mail: yjzhang@imr.ac.cn

Corresponding author: Yujuan Zhang E-mail: yjzhang@imr.ac.cn

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引用本文:

张玉娟; 孙晓峰; 金涛 . 两种NiCrAlY涂层1050℃恒温抗氧化性能[J]. 中国腐蚀与防护学报, 2002, 22(6): 339-342 .
Yujuan Zhang, Xiaofeng Sun, Tao Jin. 1050℃ ISOTHERMAL OXIDATION RESISTANCE OF TWO NiCrAlY COATINGS. J Chin Soc Corr Pro, 2002, 22(6): 339-342 .

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https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2002/V22/I6/339

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