Hot corrosion behavior of LaTi2Al9O19 ceramic exposed to vanadium oxide at temperatures of 700-950 °C in air

被引：25

作者：

Zhou, Xin ^{[1
,2
,3
]}

Xu, Zhenhua ^{[3
]}

He, Limin ^{[3
]}

Xu, Jiaying ^{[1
,2
]}

Zou, Binglin ^{[1
]}

Cao, Xueqiang ^{[1
]}

机构：

[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Rare Earth Resource Utilizat, Changchun 130022, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Beijing Inst Aeronaut Mat, Dept 5, Beijing 100095, Peoples R China

来源：

CORROSION SCIENCE | 2016年 / 104卷

关键词：

Ceramic; Molten salts; Hot corrosion; THERMAL BARRIER COATINGS; PHASE-RELATIONS; X-RAY; HEXAALUMINATE; RESISTANCE; MECHANISM; FAILURE; SYSTEM; V2O5; YSZ;

D O I：

10.1016/j.corsci.2015.12.024

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Hot corrosion behavior of LaTi2Al9O19 ceramic exposed to V2O5 at 700-950 degrees C were investigated in order to better understand the corrosion resistance of LaTi2Al9O19 as a promising thermal barrier coating material. Results indicate that the degradation processes were significantly temperature dependent. At 700 degrees C, AlVO4, LaVO4 and TiO2 were the main corrosion products, while AlVO4 partially decomposed at 800 degrees C to form theta-Al2O3 and alpha-Al2O3. After exposure to 950 degrees C, V2O5 reacted with LaTi2Al9O19 to form LaVO4, alpha-Al2O3 and TiO2 as final corrosion products. The hot corrosion mechanisms were further discussed based on the phase diagrams of V2O5-Al2O3, V2O5-La2O3 and V2O5-TiO2 systems. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：310 / 318

页数：9

共 14 条

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