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Author Zhang, F. ♦ Zhang, C. ♦ Chen, S. L. ♦ Cao, W. S. ♦ Zhu, J.
Source SpringerLink
Content type Text
Publisher Springer US
File Format PDF
Copyright Year ©2014
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics
Subject Keyword activity ♦ CALPHAD approach ♦ materials behavior ♦ modeling ♦ multicomponent ♦ phase diagram ♦ thermodynamics ♦ Crystallography ♦ Thermodynamics ♦ Engineering Thermodynamics, Heat and Mass Transfer ♦ Ceramics, Glass, Composites, Natural Methods ♦ Metallic Materials
Abstract A computational approach, which targets on the prediction of SiC recession caused by SiO$_{2}$ 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 SiO$_{2}$ 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 (Al$_{6}$Si$_{2}$O$_{13}$ or written as 3Al$_{2}$O$_{3}$·2SiO$_{2}$) or SrAS$_{2}$ (SrO·Al$_{2}$O$_{3}$·2SiO$_{2}$), are used. The effects of combustion conditions, such as temperature and total pressure, on the volatility of SiO$_{2}$ scale were also discussed.
ISSN 15477037
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2014-09-12
Publisher Place Boston
e-ISSN 18637345
Journal Journal of Phase Equilibria and Diffusion
Volume Number 35
Issue Number 6
Page Count 11
Starting Page 724
Ending Page 734


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Source: SpringerLink