Comparison of hot corrosion behaviors of plasma-sprayed nanostructured and conventional YSZ thermal barrier coatings exposure to molten vanadium pentoxide and sodium sulfate

被引：96
作者：
Jamali, Hossein [1 ]
Mozafarinia, Reza [1 ]
Shoja-Razavi, Reza [1 ]
Ahmadi-Pidani, Raheleh [1 ]
机构：
[1] Malek Ashtar Univ Technol, Dept Mat Engn, Shahin Shahr, Isfahan, Iran
来源：
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2014年 / 34卷 / 02期
关键词：
Yttria stabilized zirconia; Thermal barrier coating; Hot corrosion; Nanostructure; MECHANICAL-PROPERTIES; PHASE-STABILITY; BOND COAT; MICROSTRUCTURE; RESISTANCE; CERIA;
D O I：
10.1016/j.jeurceramsoc.2013.08.006
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The purpose of the current study was evaluation and comparison of hot corrosion behaviors of plasma-sprayed conventional and nanostructured yttria stabilized zirconia (YSZ) thermal barrier coatings (TBCs). Hot corrosion studies were performed on the surface of coatings in the presence of a molten mixture of V2O3+Na2SO4 at 1000 degrees C for 30 h. Results indicated that the hot corrosion mechanisms of conventional and nanostructured YSZ coatings were similar. The reaction between corrosive salt and Y2O3 produced YVO4, leaching Y2O3 from YSZ and causing the detrimental phase transformation of zirconia from tetragonal to monoclinic. The nanostructured coating, as compared to its conventional counterpart, in spite of a further reaction with the corrosive salt, showed a higher degradation resistance during the hot corrosion test due to increased compliance capabilities resulting from the presence of an extra source of porosity associated with the nano-zones. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：485 / 492
页数：8
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