Performance of Chemical Vapor Deposition and Plasma Spray-Coated Stainless Steel 310 in Supercritical Water

被引：8
作者：
Huang, Xiao [1 ]
Yang, Q. [2 ]
Guzonas, Dave [3 ]
机构：
[1] Carleton Univ, Mech & Aerosp Engn Dept, 1125 Colonel By Dr, Ottawa, ON K1S 5B6, Canada
[2] Natl Res Council Canada, Ottawa, ON K1A 0R6, Canada
[3] Atom Energy Canada Ltd, Chalk River, ON K0J 1J0, Canada
来源：
JOURNAL OF NUCLEAR ENGINEERING AND RADIATION SCIENCE | 2016年 / 2卷 / 02期
基金：
加拿大自然科学与工程研究理事会;
关键词：
D O I：
10.1115/1.4031198
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
In this study, aluminized and NiCrAlY plasma-sprayed AISI 310 stainless steel samples were tested in supercritical water (SCW) at 500 degrees C. The microstructure after SCW exposure was analyzed using scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), and X-ray diffraction (XRD). Weight measurements were taken before and after exposure to provide quantitative comparison of the two coatings on AISI 310 base metal. The results showed that aluminized and bare 310 stainless steel experienced similar weight gain, in the range of 0.02-0.08 mg/cm(2) after 1550 hr. The aluminized sample had a slight weight decrease as exposure progressed. Oxide formation, in the forms of Al2O3 and (Fe,Cr)(2)O-3, was found on the aluminized surface along with surface cracking after 1550 hr testing in SCW. NiCrAlY-coated 310, however, had the most consistent weight increase and oxide formation (mainly Al2O3) on the surface. Based on the results from this study, the aluminized coating has limitations in providing surface protection due to surface cracking and weight loss. The NiCrAlY plasma-sprayed coating with alumina formation on the surface has the potential to provide long-term surface protection to the substrate material in SCW.
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页数：8
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