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Mechanically Activated Combustion Synthesis of β‐Si 6− z Al z O z N 8− z ( z =1–4)
Author(s) -
Aoyagi Kazuhiko,
Hiraki Takehito,
Sivakumar Ramasamy,
Watanabe Toshiyuki,
Akiyama Tomohiro
Publication year - 2007
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.1551-2916.2006.01387.x
Subject(s) - combustion , sialon , raw material , materials science , ball mill , chemical engineering , analytical chemistry (journal) , metallurgy , chemistry , sintering , organic chemistry , engineering
Fine β‐sialon (Si 6− z Al z O z N 8− z , 1< z <4) was prepared by mechanical‐activated combustion synthesis (CS) using raw materials such as Si, Al, and SiO 2 in a nitriding atmosphere of 1 MPa. Mechanical activation by planetary milling for only 18 min led to the formation of β‐sialon after combustion synthesis. Comparative experiments with ball milling showed that the relative amount of β‐sialon was considerably increased to 66% when planetary milled to 18 min after CS. The raw material Si was replaced by waste Si of 94.8 mass% in purity, and was combustion synthesized successfully under the same processing parameters for cost‐effective measures.