Processing and Microstructure of Intragranular Al2O3-SiC Nanocomposites

Journal of Inorganic Materials

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Processing and Microstructure of Intragranular Al₂O₃-SiC Nanocomposites

WANG Hongzhi; GAO Lian; GUI Linhua; GUO Jingkun

The State Key Lab on High Performance Ceramics and Suprefine Microstructure; Shanghai Institute ofCeramics; Chinese Academy of Sciences Shanghai 200050 China

Received:1997-03-25 Revised:1997-05-12 Published:1997-10-20 Online:1997-10-20

Abstract

Abstract: Al₂O₃-5vol% SiC nanoscale composite powder was prepared by the precipitation method.Al₂O₃-SiC nanocomposites were made by HP sintering. The strength of Al₂O₃-SiC nanocomposites is 467MPa, toughniess is 4. 7MPa.m^1/2. Nano SiC particles were located in Al₂O₃ grains because of the transformation of Al₂O₃ from γ phase to α phase. This intragranular microstructure is effective in improving mechanical properties. Therefore, the precipitation method is a good way to fabricate Al₂O₃-SiC nanocomposites.

Key words: precipitation mothod, nanocomposites, alumina

WANG Hongzhi,GAO Lian,GUI Linhua,GUO Jingkun. Processing and Microstructure of Intragranular Al₂O₃-SiC Nanocomposites[J]. Journal of Inorganic Materials.

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Processing and Microstructure of Intragranular Al₂O₃-SiC Nanocomposites

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