Hot corrosion behaviour of D-gun sprayed NiCoCrAlYTa coated superalloys at 900°C in molten salt environment

被引：21

作者：

Kamal, S. ^{[1
]}

Jayaganthan, R. ^{[1
]}

Prakash, S. ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Met & Mat Engn, Roorkee 247667, Uttar Pradesh, India

来源：

SURFACE ENGINEERING | 2010年 / 26卷 / 06期

关键词：

D-gun spray; Hot corrosion; Microstructural characterisation; NI-BASED SUPERALLOYS; ISOTHERMAL OXIDATION; COATINGS; NICKEL; MICROSTRUCTURE; FAILURE; ALLOYS;

D O I：

10.1179/026708410X12459349720132

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Detonation-gun sprayed NiCoCrAlYTa coatings deposited on superalloys have been investigated for their hot corrosion behaviour at 900 degrees C in molten salt environment under cyclic conditions. The weight change measurements made on the bare and coated superalloys were used to determine the kinetics of hot corrosion. X-ray diffraction, X-ray mapping and field emission scanning electron microscope/EDS were used to characterise the corroded products of the coated and bare superalloys and substantiate the corrosion mechanisms. The formation of scales such as NiCr2O4, NiAl2O4 and Al2O3 on the coated superalloys provided a higher hot corrosion resistance as observed in the present work.

引用

页码：453 / 462

页数：10

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