Phase State Diagrams of a Four-Component System Al-Si-N-O - Analysis of the Thermodynamic Stability of Sialon Compounds Dased on Energy Crystal-Chemistry
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The paper presents the results of the analysis of the state diagram of compounds in the system А12O3-SiO2. It has been found that the presence and the concentration of oxygen have a very important effect on formation of compounds with a crystalline structure in different syngony based on SIALON. Oxygen contributes to transition of the metastable AlXSi3-XN4compound into stable one. The parameter of structural “friability” of compounds has been used in the analysis of thethermodynamic stability of compounds in the Al-Si-N-O system. It has been foundthat the SiAl4O2N4 compound with the 12H-SIALON structure (Pearson symbol hP32) has the greatest thermodynamic stability among the compounds under study in this system.
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2016 ◽
Vol 848
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pp. 89-94
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2012 ◽
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pp. 1679-1685
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pp. 1831-1837
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pp. 10-18
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2017 ◽
Vol 19
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pp. 6532-6545
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