Subsolidus phase relationships in part of the system Si,Al,Y/N,O; The system Si[sub 3]N[sub 4]-AlN-YN-Al[sub 2]O[sub 3]-Y[sub 2]O[sub 3]

• Published in: Journal of the American Ceramic Society 1991-11, Vol.74:1
• Main Authors: Sun, W.Y., Tien, T.Y., Yen, T.S.
• Format: Article
• Language: English
• Subjects: 360201 - Ceramics, Cermets, & Refractories- Preparation & Fabrication; 360202 - Ceramics, Cermets, & Refractories- Structure & Phase Studies; 400201 - Chemical & Physicochemical Properties; ALUMINIUM COMPOUNDS; ALUMINIUM NITRIDES; ALUMINIUM OXIDES; BINARY MIXTURES; CHALCOGENIDES; CHEMICAL PREPARATION; DISPERSIONS; INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; MATERIALS SCIENCE; MIXTURES; NITRIDES; NITROGEN COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PHASE STUDIES; PNICTIDES; SILICON COMPOUNDS; SILICON NITRIDES; SOLUBILITY; SYNTHESIS; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS; YTTRIUM NITRIDES; YTTRIUM OXIDES
• ISSN: 0002-7820; 1551-2916
• DOI: 10.1111/j.1151-2916.1991.tb06839.x

In this paper the subsolidus phase relationships in the system Si,Al,Y/N,O are determined. Thirty-nine compatibility tetrahedra are established in the region Si[sub 3]N[sub 4]-A1N-A1[sub 2]O[sub 3]-Y[sub 2]O[sub 3]. The subsolidus phase relationships in the region Si[sub 3]N[sub 4]-A1N-YN-Y[sub 2]O[sub 3] are also studied. Only one compound, 2YN:Si[sub 3]N[sub 4], is confirmed in the binary system Si[sub 3]N[sub 4]-YN. The solubility limits of the [alpha]-SiA1ON on the Si[sub 3]N[sub 4] YN:3A1N join were determined to range from m = 1.3 to m = 2.4 in the formula Y[sub m/3]Si[sub 12-m]A1[sub m]N[sub 16]. No quinary compound is found. Seven compatibility tetrahedra are established in the region Si[sub 3]N[sub 4]-A1N-YN-Y[sub 2][sub 3].