Microstructural, mechanical and oxidation features of NiCoCrAlY coating produced by plasma activated EB-PVD

被引：50
|
作者：
He, Jian [1 ]
Guo, Hongbo [1 ]
Peng, Hui [1 ]
Gong, Shengkai [1 ]
机构：
[1] Beihang Univ BUAA, Sch Mat Sci & Engn, Beijing Key Lab Adv Funct Mat & Thin Film Technol, Beijing 100191, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2013年 / 274卷
关键词：
Coating; Structure; Oxidation; Plasma activated electron beam physical vapor deposition (PAEB-PVD); THERMAL BARRIER COATINGS; BOND COAT; PREOXIDATION TREATMENT; DIFFUSION BARRIER; OXIDE INCLUSIONS; BEHAVIOR; IMPROVEMENT; DEPOSITION; RESISTANCE; LIFETIME;
D O I：
10.1016/j.apsusc.2013.02.136
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
NiCoCrAlY coatings produced by electron beam-physical vapor deposition (EB-PVD) have been extensively used as the oxidation resistance coatings or suitable bond coats in thermal barrier coating (TBC) system. However, the inherent imperfections caused by EB-PVD process degrade the oxidation resistance of the coatings. In the present work, NiCoCrAlY coatings were creatively produced by plasma activated electron beam-physical vapor deposition (PA EB-PVD). The novel coatings showed a terraced substructure on the surface of each grain due to the increased energy of metal ions and enhanced mobility of adatoms. Also a strong (1 1 1) crystallographic texture of gamma/gamma' grains was observed. The toughness of the coatings got remarkably improved compared with the coatings deposited by conventional EB-PVD and the oxidation behavior at 1373 K showed that the novel coatings had excellent oxidation resistance. The possible mechanism was finally discussed. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：144 / 150
页数：7
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