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Mechanical Properties of β‐Si3N4‐Whisker/Si3N4‐Matrix Composites

 

作者: Joseph Homeny,   Lynn J. Neergaard,  

 

期刊: Journal of the American Ceramic Society  （WILEY Available online 1990）
卷期: Volume 73, issue 11  

页码: 3493-3496

 

ISSN:0002-7820

 

年代: 1990

 

DOI:10.1111/j.1151-2916.1990.tb06482.x

 

出版商: Blackwell Publishing Ltd

 

关键词: silicon nitride;whiskers;composites;mechanical properties;fracture toughness

 

数据来源: WILEY

 

摘要:

Composites containing 30 vol%β‐Si3N4whiskers in a Si3N4matrix were fabricated by hot‐pressing. The composites exhibited fracture toughness values between 7.6 and 8.6 MPa · m1/2, compared to 4.0 MPa · m1/2for unreinforced polycrystalline Si3N4. The improvements in fracture toughness were attributed to crack wake effects, i.e., whisker bridging and pullout mech

 

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