Synthesis and Processing of Sialons

The synthesis of sialons is a complex process, many details of which still have not been elucidated. The reaction of silicon nitride with alumina and/or aluminum nitride involves the formation of intermediate products, and their complete and 

One of the oldest industrial methods used to synthesize sialons (see Section 11.3.4.3) involves the carbothermal nitriding of alumosihcates (e.g., kaoHnite) according to  

2Si02 -I-4A1-I-2N2 — Si2Al404N4 Rice hulls can also be processed with comparable results. 

The crystalHne YAG phase collects at grain boundaries and acts as a structurally reinforcing constituent. 

The second type of sialon, a-sialon (see Section 11.3.4.3), can be synthesized by reacting sihcon nitride with aluminum nitride and a stabilizing alkali, alkali earth, or REE ions according to  

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