Microscale lamellar NiCoCrAlY coating with improved oxidation resistance

被引：22

作者：

Peng, Hui ^{[1
]}

Guo, Hongbo ^{[1
]}

He, Jian ^{[1
]}

Gong, Shengkai ^{[1
]}

机构：

[1] Beihang Univ BUAA, Sch Mat Sci & Engn, Beijing 100191, Peoples R China

来源：

SURFACE & COATINGS TECHNOLOGY | 2012年 / 207卷

关键词：

Oxidation; Alumina scale; Coating; Plasma activated electron beam-physical vapor deposition (PA EB-PVD); THERMAL BARRIER COATINGS; HIGH-TEMPERATURE OXIDATION; BOND COATS; DIFFUSION BARRIER; CYCLIC OXIDATION; BEHAVIOR; MICROSTRUCTURE; PLASMA; PREOXIDATION; BONDCOATS;

D O I：

10.1016/j.surfcoat.2012.06.034

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A novel NiCoCrAlY coating was fabricated by plasma activated electron beam-physical vapor deposition (PA EB-PVD). Within the duplex coating, the beta-NiAl phase precipitated as small lamellae (less than 1 mu m thick) in a gamma matrix, predominantly oriented perpendicular to the coating surface. The oxidation results at 1373 K show that the scaling rate constant during the steady-state oxidation of the novel coating is reduced by approximately 70% as compared with the conventional coating of similar composition produced by electron beam-physical vapor deposition (EB-PVD). This reduction in oxidation rate is attributed to a slower theta -> alpha Al2O3 phase transformation during the initial stages of oxidation. (c) 2012 Elsevier B.V. All rights reserved.

引用

页码：110 / 116

页数：7

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