Formation of a dense and continuous Al2O3 layer in nano thermal barrier coating systems for the suppression of spinel growth on the Al2O3 oxide scale during oxidation

被引：61
作者：
Daroonparvar, Mohammadreza [1 ]
Yajid, Muhamad Azizi Mat [1 ]
Yusof, Noordin Mohd [1 ]
Hussain, Mohammad Sakhawat [1 ]
Bakhsheshi-Rad, Hamid Reza [1 ]
机构：
[1] Univ Teknol Malaysia, Fac Mech Engn, Dept Mat Mfg & Ind Engn, Johor Baharu 81310, Johor, Malaysia
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2013年 / 571卷
关键词：
Intermetallic compounds; Nanostructures; Coatings; Plasma deposition; Oxidation; Diffusion; BEHAVIOR; HVOF; FAILURE;
D O I：
10.1016/j.jallcom.2013.03.168
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：
A continuous and thin Al2O3 layer would act as an infiltration barrier to diminish the growth of spinels in thermal barrier coating systems. Therefore, isothermal oxidation of normal NiCrAlY/YSZ, nano NiCrAlY/YSZ and nano NiCrAlY/YSZ/nano Al2O3 coatings was investigated at 1000 degrees C. These samples were then subjected to thermal cycles at 1150 degrees C. The microstructural characterisation showed that the spinel growth in the nano NiCrAlY/YSZ/nano Al2O3 coating was much lower than the other coatings. This observation can be related to the formation of a fully continuous Al2O3 layer on the nano NiCrAlY coating during pre-oxidation at 1000 degrees C and also to the presence of a nano Al2O3 layer over the YSZ coating. (C) 2013 Elsevier B. V. All rights reserved.
引用
收藏
页码：205 / 220
页数：16
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