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Thermal Stability of Al 3 BC 3
Author(s) -
Lee SeaHoon,
Tanaka Hidehiko
Publication year - 2009
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2009.03171.x
Subject(s) - vaporization , crucible (geodemography) , calcination , thermal decomposition , aluminium , carbon fibers , decomposition , thermal stability , materials science , allotropy , volatilisation , analytical chemistry (journal) , metallurgy , mineralogy , chemistry , composite material , composite number , phase diagram , phase (matter) , catalysis , biochemistry , computational chemistry , organic chemistry , chromatography
The thermal stability of Al 3 BC 3 powder was analyzed. Nearly X‐ray‐pure Al 3 BC 3 powder was obtained through the calcination of the aluminum, B 4 C, and carbon mixture at 1800°C in Ar. In contrast to the former investigations, which reported the melting of so called “Al 8 B 4 C 7 ” at 1800°C, Al 3 BC 3 did not melt up to 2100°C. Instead, it decomposed by the vaporization of aluminum. The decomposition occurred distinctly at 1400° and 1900°C in flowing Ar and a sealed carbon crucible, respectively. The results indicated that the decomposition temperature depended on the partial pressure of aluminum vapour in the atmosphere.