Abstract

Phase equilibria studies in parts of the system Si, Al, Be/C, N were carried out at 1760 and 1860°C. In the carbide system Al 4C 3SiCBe 2C seven new compounds were found and characterized by their chemical composition and crystal symmetry. In the nitride system AlNSi 2N 4Be 2N 2 a solid solution between AlN and BeSiN 2 was found to exist besides the already known compounds. The carbonitride system showed solid solution between α-Al 4SiC 4 and α-Al 5C 3N. Furthermore the compound AlN · SiC · Al 4C 3 was found to exist.

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