首页 | 本学科首页   官方微博 | 高级检索  
     


A Combined Thermodynamic/Kinetic Modeling Approach to Predict SiC Recession Due to SiO2 Scale Volatility Under Combustion Environments
Authors:F Zhang  C Zhang  S-L Chen  W-S Cao  J Zhu
Affiliation:1. CompuTherm LLC, Madison, WI, 53719, USA
Abstract:A computational approach, which targets on the prediction of SiC recession caused by SiO2 scale volatility under combustion environments, was developed in this study. In this approach, thermodynamic calculation was integrated with a gaseous-diffusion model to calculate the fluxes of volatile species, such as SiO(g), Si(OH)4(g), SiO(OH)2(g), and SiO(OH)(g), produced by the reaction of SiO2 scale with the combustion air. The resulted weight loss of SiC was then calculated under a variety of combustion environments. The benefit of using environmental barrier coating (EBC) in the protection of SiC from recession was demonstrated by the calculation. It is shown that the weight loss of SiC-based ceramics could be significantly reduced when EBCs, such as mullite (Al6Si2O13 or written as 3Al2O3·2SiO2) or SrAS2 (SrO·Al2O3·2SiO2), are used. The effects of combustion conditions, such as temperature and total pressure, on the volatility of SiO2 scale were also discussed.
Keywords:
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号