Stability of rare earth oxides in a moist environment at high temperatures-Experimental and thermodynamic studies. Part I: The way to assess thermodynamic parameters from volatilisation rates

被引：12

作者：

Courcot, Emilie ^{[1
]}

Rebillat, Francis ^{[1
]}

Teyssandier, Francis ^{[1
]}

Louchet-Pouillerie, Caroline ^{[2
]}

机构：

[1] Univ Bordeaux, Lab Composites ThermoStruct, F-33600 Pessac, France

[2] Grp SAFRAN, F-33185 Le Haillan, France

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2010年 / 30卷 / 09期

关键词：

Corrosion; SiO(2); Y(2)O(3); Refractories; Thermodynamics; OXYGEN PHASE-DIAGRAM; MASS SPECTROMETRY; BARRIER COATINGS; GASEOUS SIO(OH); WATER-VAPOR; SYSTEM; THERMOCHEMISTRY; MONOXIDES; H2O(G); ENERGY;

D O I：

10.1016/j.jeurceramsoc.2010.02.011

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：

A methodology based on a weight loss measurement was used to quantify the volatility of yttria in high temperature water vapor. This method was first assessed on silica. Sintered materials with a shape of pellets were exposed at temperatures between 1000 and 1400 degrees C in air with 50 kPa of water at atmospheric pressure, under a flowing gas velocity of 5 cm s(-1). Besides the volatilisation rate, the nature of the volatile gaseous species was determined using a kinetic study. Knowing the nature of flows in the furnace, partial pressures of yttrium (oxy-)hydroxide in equilibrium over Y(2)O(3) were calculated, and used to assess the enthalpies of formation of YO(OH) and Y(OH)(3). (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：1903 / 1909

页数：7