Synthesis of single phase β-SiAlON ceramics by reaction-bonded sintering using Si and Al2O3 as raw materials

Synthesis of single phase β-SiAlON ceramics by reaction-bonded sintering using Si and Al2O3 as raw materials

Single-phase beta -SiAlON compacts with z =1 have been synthesized by reaction-bonded sintering using Si and Al2O3 as raw materials. The nitrided samples consisted of fine equiaxed particles and continuous fibers. beta -SiAlON fibers with a diameter approximately 50nm were obtained through the vapor...

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Veröffentlicht in:Scripta materialia 2011-07, Vol.65 (2), p.155-158
Hauptverfasser: He, Enquan, Yue, Jianshe, Fan, Lei, Wang, Chao, Wang, Hongjie
Format: Artikel
Sprache:eng
Schlagworte:
Aluminum oxide
Ceramics
Compacts
Microstructure
Raw materials
Silicon
Sintering
Synthesis
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Zusammenfassung:Single-phase beta -SiAlON compacts with z =1 have been synthesized by reaction-bonded sintering using Si and Al2O3 as raw materials. The nitrided samples consisted of fine equiaxed particles and continuous fibers. beta -SiAlON fibers with a diameter approximately 50nm were obtained through the vapor-solid mechanism. After post-sintering at 1650-1750A degree C for 2h, only beta -SiAlON phase with z =1 was obtained. alpha -Si3N4 completely changed into beta -SiAlON through the solution-precipitation mechanism. beta -SiAlON shows different microstructures at different post-sintering temperature.
ISSN:1359-6462
DOI:10.1016/j.scriptamat.2011.03.040