Thermal Stability of Al3BC3

The thermal stability of Al3BC3 powder was analyzed. Nearly X‐ray‐pure Al3BC3 powder was obtained through the calcination of the aluminum, B4C, and carbon mixture at 1800°C in Ar. In contrast to the former investigations, which reported the melting of so called “Al8B4C7” at 1800°C, Al3BC3 did not me...

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Published in:Journal of the American Ceramic Society 2009-09, Vol.92 (9), p.2172-2174
Main Authors: Lee, Sea-Hoon, Tanaka, Hidehiko
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Tanaka, Hidehiko
description The thermal stability of Al3BC3 powder was analyzed. Nearly X‐ray‐pure Al3BC3 powder was obtained through the calcination of the aluminum, B4C, and carbon mixture at 1800°C in Ar. In contrast to the former investigations, which reported the melting of so called “Al8B4C7” at 1800°C, Al3BC3 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.
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title Thermal Stability of Al3BC3
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