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Mechanical Properties and Microstructure of Alumina‐Glass Composites
Author(s) -
Tian JieMo,
Zhang YunLong,
Zhang ShiXin,
Luo XiaoPing
Publication year - 1999
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.1151-2916.1999.tb01964.x
Subject(s) - materials science , composite material , microstructure , sintering , fracture toughness , flexural strength , cubic zirconia , shrinkage , hot isostatic pressing , ceramic
Alumina blanks were prepared via isostatic pressing and sintering at 1400°C for 2 h, whereas alumina‐glass composites were prepared by infiltrating the molten glass into the partially sintered alumina compacts. The samples had a high bending strength (340 MPa) and high fracture toughness (3.91 MPa·m 1/2 ) and were free of shrinkage. Concurrently, zirconia (5 wt%) was used as an additive to alumina to improve the mechanical properties of both partially sintered alumina and alumina‐glass composites. Results show that zirconia notably improves the mechanical properties of the partially sintered alumina but increases that of the composites by no more than 10%.