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Fracture Behavior of SiC‐Whisker‐Reinforced Barium Aluminosilicate Glass‐Ceramic Matrix Composites
Author(s) -
Ye Feng,
Yang Jue Ming,
Zhang Li Tong,
Zhou Wan Cheng,
Zhou Yu,
Lei Ting Chuan
Publication year - 2001
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.1151-2916.2001.tb00759.x
Subject(s) - whisker , materials science , composite material , whiskers , mullite , flexural strength , fracture toughness , ceramic , microstructure , aluminosilicate , indentation , hot pressing , ceramic matrix composite , cubic zirconia , transgranular fracture , grain boundary , intergranular fracture , biochemistry , chemistry , catalysis
Barium aluminosilicate (BAS) glass‐ceramic composites reinforced with various volume percents (0, 10, 20, 30, 40 vol%) of SiC whiskers were fabricated by hot pressing. The microstructure, the whisker/matrix interface structure, the phase constitution, and the mechanical properties of the composites were systematically studied by means of SEM, TEM, and XRD techniques as well as by indentation crack microfracture and single‐edge‐notched‐beam bend testing. It was demonstrated that the incorporation of SiC whiskers could significantly increase the flexural strength and fracture toughness of BAS glass‐ceramic matrices. The addition of active Al 2 O 3 to the BAS matrix reduced the amount of SiO 2 in the matrix, forming needlelike mullite, which further improved the mechanical properties.