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Author Padture, N. P. ♦ Klemens, P. G.
Sponsorship Department of the Air Force, Washington, DC (United States)
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ THERMAL CONDUCTIVITY ♦ YTTRIUM OXIDES ♦ ALUMINIUM OXIDES ♦ IRON OXIDES ♦ SOLID SOLUTIONS ♦ TEMPERATURE RANGE 0273-0400 K ♦ TEMPERATURE DEPENDENCE ♦ CHEMICAL COMPOSITION ♦ EXPERIMENTAL DATA
Abstract The thermal conductivity of dense, polycrystalline garnet ceramics with compositions of Y{sub 3}Al{sub x}Fe{sub 5{minus}x}O{sub 12} (x = 0.0, 0.7, 1.4, and 5.0) was measured in the temperature range 23 to 1,000 C. The high-temperature thermal conductivity of some of these garnets was found to be as low as 2.4 W{center_dot}m{sup {minus}1}{center_dot}K{sup {minus}1}. The effects of temperature and composition on the observed thermal conductivity are discussed with reference to established theories of thermal conduction. The potential use of yttrium aluminum garnet or YAG (Y{sub 3}Al{sub 5}O{sub 12}), in particular, for a specific application of advanced thermal barrier coatings (TBCs) with improved durability is considered.
ISSN 00027820
Educational Use Research
Learning Resource Type Article
Publisher Date 1997-04-01
Publisher Place United States
Journal Journal of the American Ceramic Society
Volume Number 80
Issue Number 4


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