A study on the oxidation behavior of HVOF sprayed NiCrAlY-0.4 wt.% CeO2 coatings on superalloys at elevated temperature

被引：42
|
作者：
Mahesh, R. A. [1 ]
Jayaganthan, R. [1 ]
Prakash, S. [1 ]
机构：
[1] Indian Inst Technol Roorkee, Dept Met & Mat Engn, Roorkee 247667, Uttar Pradesh, India
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2010年 / 119卷 / 03期
关键词：
Alloys (A); Coatings (B); Corrosion (D); FE-BASED SUPERALLOYS; NI-5AL COATINGS; NI-CR; OXIDE; CHROMIA; AIR; RESISTANCE; ELEMENTS; STEEL;
D O I：
10.1016/j.matchemphys.2009.09.024
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The high temperature oxidation behavior of HVOF sprayed ceria added NiCrAlY coatings on superalloys has been studied. oxidation kinetics of the bare and coated superalloys in air at 900 degrees C under cyclic conditions was investigated. X-ray diffraction, field emission scanning electron microscope with energy dispersive spectroscopy and X-ray mapping were used to analyse the scales formed on the surface of the oxidised samples. The NiCrAlY-0.4wt.% CeO2 coated specimen showed negligible microspalling of the scales. The incorporation of ceria in NiCrAlY powder has contributed to the development of adherent oxide scale, in the coating, at elevated temperature and provided the better oxidation resistance. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：449 / 457
页数：9
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