Hot corrosion mechanism of yttria-stabilized zirconia powder in the presence of molten Na_(2)SO_(4)+V_(2)O_(5) salts  

作　　者：Jhonattan De la Roche Juan Manuel Alvarado-Orozco Alejandro Toro 

机构地区：[1]Tribology and Surfaces Group,Universidad Nacional de Colombia,Medellin 050041,Colombia [2]Centro de Ingeniena y Desarrollo Industrial-CIDESI,Queretaro 76125,Mexico [3]Consorcio de Manufactura Aditiva-CONMAD,Queretaro 76125,Mexico

出　　处：《Rare Metals》2021年第5期1307-1316,共10页稀有金属（英文版）

基　　金：financially supported by Empresas Publicas de Medellin-EPM(No.203010022338)。

摘　　要：The hot corrosion behavior of yttria-stabilized zirconia(YSZ)powder specimens exposed to Na_(2)SO_(4)/V_(2)O_(5) salts mixtures at high temperature was evaluated.Initial tests were carried out at 1000℃ for 10 h,the salt concentrations varied from 0.1 wt%to 1.00 wt%,and the Na_(2)SO_(4)/V_(2)O_(5) mass ratios were between 0.20 and 0.44 following a factorial design 22.X-ray diffraction(XRD)analyses of the tested samples showed with a confidence of95%that the mixture composed of 32 wt%Na_(2)SO_(4)+68 wt%V_(2)O_(5),and 1.00 wt% salt concentration led to high destabilization of the t’-YSZ phase and formation of YVO_(4) products.A second set of experiments were conducted to assess the influence of temperature on the hot corrosion response of the YSZ in the range between 490 and 1100℃.Thermogravimetric analysis(TGA)experiments and Rietveld adjustments of XRD patterns showed that the mass loss of the samples varied with testing temperature and also that the major destabilization of tetragonal phase occurred at 900℃.

关 键 词：Hot corrosion Molten salts Yttria-stabilized zirconia Thermal barrier coatings 

分 类 号：TB304[一般工业技术—材料科学与工程]