Phase stability and hot corrosion behavior of ZrO2-Ta2O5 compound in Na2SO4-V2O5 mixtures at elevated temperatures

被引：39
作者：
Habibi, M. H. [1 ]
Yang, Shizhong [2 ]
Guo, S. M. [1 ]
机构：
[1] Louisiana State Univ, Dept Mech & Ind Engn, Baton Rouge, LA 70803 USA
[2] Southern Univ & A&M Coll, LONI Inst, Dept Comp Sci, Baton Rouge, LA 70813 USA
来源：
CERAMICS INTERNATIONAL | 2014年 / 40卷 / 03期
基金：
美国国家科学基金会;
关键词：
Hot corrosion; Ta2O5; ZrO2; Thermal bather coating (TBC); THERMAL BARRIER COATINGS; TOTAL-ENERGY CALCULATIONS; ZIRCONIA; YTTRIA; DEGRADATION; CERIA; RESISTANCE; SYSTEMS; SODIUM;
D O I：
10.1016/j.ceramint.2013.08.062
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：
For thermal bather coating (TBC) applications, yttria stabilized zirconia (YSZ) is susceptible to hot corrosion. This paper examines the hot corrosion performance of ZrO2/Ta2O5 compounds. Different compositions of ZrO2-Ta2O5 samples in the presence of molten mixture of Na2SO4+V2O5 at 1100 degrees C were tested. The compositions were selected to form tetragonal and orthorhombic phases of zirconium-tantalum oxides. Results show that orthorhombic zirconium-tantalum oxide is more stable, both thermally and chemically in Na2SO4+V2O5 media at 1100 degrees C, and shows a better hot corrosion resistance than the tetragonal phase. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
引用
收藏
页码：4077 / 4083
页数：7
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