Oxidation Performance and Interdiffusion Behavior of a Pt-Modified Aluminide Coating with Pre-deposition of Ni

被引：6

作者：

Liu, He ^{[1
,2
]}

Li, Shuai ^{[1
,2
]}

Jiang, Cheng-Yang ^{[3
]}

Yu, Chun-Tang ^{[1
,2
]}

Bao, Ze-Bin ^{[1
]}

Zhu, Sheng-Long ^{[1
]}

Wang, Fu-Hui ^{[3
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China

[2] Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China

[3] Northeastern Univ, Shenyang Natl Lab Mat Sci, Shenyang 110819, Liaoning, Peoples R China

来源：

ACTA METALLURGICA SINICA-ENGLISH LETTERS | 2019年 / 32卷 / 12期

基金：

中国国家自然科学基金;

关键词：

Aluminide coating; Oxidation; Interdiffusion; Microstructure; SUPERALLOY DZ 125; DIFFUSION BARRIER; BOND COAT; THERMAL-STABILITY; CYCLIC OXIDATION; PLATINUM; PRECIPITATION; TEMPERATURE; INSTABILITY; ALPHA-AL2O3;

D O I：

10.1007/s40195-019-00918-y

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

To refrain the interdiffusion of elements while holding good oxidation resistance, a (Ni,Pt)Al/Ni composite coating was prepared by sequential treatments of electroplating Ni and Pt and successive gaseous aluminization. In comparison with normal (Ni,Pt)Al coating, high-temperature performance of the composite coating was evaluated in isothermal oxidation test at 1100 degrees C. Both the two coatings exhibited good resistance against high-temperature oxidation, but the interdiffusion of elements between composite coating and single-crystal (SC) superalloy substrate was greatly relieved, in which the thickness of secondary reaction zone (SRZ) and the amount of precipitated topologically close-packed phase in the SC alloy matrix were significantly decreased. Mechanisms responsible for delaying rate of coating degradation and SRZ growth/propagation are discussed.

引用

页码：1490 / 1500

页数：11

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