NDLI: Calcium-magnesium aluminosilicate (cmas) interactions with advanced environmental barrier coating material

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Calcium-magnesium aluminosilicate (cmas) interactions with advanced environmental barrier coating material

Content Provider	NASA Technical Reports Server (NTRS)
Author	Wiesner, Valerie L. Bansal, Narottam P.
Copyright Year	2015
Description	Particulates, like sand and volcanic ash, threaten the development of robust environmental barrier coatings (EBCs) that protect next-generation silicon-based ceramic matrix composite (CMC) turbine engine components from harsh combustion environments during service. The siliceous particulates transform into molten glassy deposits of calcium-magnesium aluminosilicate (CMAS) when ingested by an aircraft engine operating at temperatures above 1200C. In this study, a sample of desert sand was melted into CMAS glass to evaluate high-temperature interactions between the sand glass and an advanced EBC material. Desert sand glass was added to the surface of hot-pressed EBC substrates, which were then heated in air at temperatures ranging from 1200C to 1500C. Scanning electron microscopy and X-ray energy-dispersive spectroscopy were used to evaluate microstructure and phase compositions of specimens and the CMASEBC interface after heat treatments.
File Size	1109277
Page Count	16
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20150022120
Archival Resource Key	ark:/13960/t52g2qx1n
Language	English
Publisher Date	2015-06-18
Access Restriction	Open
Subject Keyword	Cmas-coating Interactions Cmas Chemical Interactions Sands Ceramic Matrix Composites Heat Treatment Calcium Glass Combustion Magnesium Coatings Microstructure Protective Coatings Turbine Engines Operating Temperature Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Presentation

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