A method for assessing the volatility of oxides in high-temperature high-velocity water vapor
A method for assessing the volatility of oxides in high-temperature high-velocity water vapor
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DOI：
10.1016/j.jeurceramsoc.2015.11.016
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发表时间：
2016-04-01
影响因子：
5.7
通讯作者：
Opila, Elizabeth J.
中科院分区：
文献类型：
--
作者：
Golden, Robert A.;Opila, Elizabeth J.
利用蒸汽喷射炉评估模拟涡轮机环境中SiO2、TiO 2和Y2 O3的挥发性。将样品暴露在蒸汽喷射炉中，蒸汽温度为1240-1300 ℃，气体速度为165-177 m/s，压力为1 atm H2O。蒸汽射流冲击在所研究的试样上，通过形成挥发性氢氧化物物质导致表面凹陷。SiO2的线性挥发动力学。测量的SiO2的衰退速率与基于Si（OH）（4）（g）的评估热力学数据计算的衰退速率合理一致。在本研究中测得的TiO 2的衰退速率显著高于基于TiO（OH）（2）（g）的测得热力学数据的衰退速率，并且低于先前的实验结果。测量的Y2 O3的衰退速率与使用Y（OH）（3）（g）形成的估计热力学数据计算的衰退速率相当一致，并且显著低于先前的实验结果。(C)2015爱思唯尔有限公司版权所有。
A steam-jet furnace was utilized to assess the volatility of SiO2, TiO2 and Y2O3 in a simulated turbine engine environment. Specimens were exposed in the steam-jet furnace at 1 atm H2O, steam temperatures of 1240-1300 degrees C, and gas velocities of 165-177 m/s. The jet of steam impinged on the specimen under study leading to surface recession via the formation of volatile hydroxide species. Linear volatilization kinetics were observed for SiO2. The measured recession rate of SiO2 was in reasonable agreement with the calculated recession rate based on assessed thermodynamic data for Si(OH)(4) (g). The measured recession rate of TiO2 in this study was considerably higher than the recession rate based on measured thermodynamic data for TiO(OH)(2) (g) and lower than prior experimental results. The measured recession rate of Y2O3 was in fair agreement with the calculated recession rate using estimated thermodynamic data for Y(OH)(3) (g) formation and was significantly lower than prior experimental results. (C) 2015 Elsevier Ltd. All rights reserved.