Enhanced Strengths and Thermal Shock Resistance of SiC-BN-10 Vol% Cf Composites through ZrB2 Addition
Creators
- 1. Institute for Advanced Ceramics, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080 (China)
- 2. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081 (China)
Description
Microstructures, mechanical properties, thermal shock resistance, as well as oxidation resistance of short carbon fiber (Cf) and nano ZrB2 enhanced SiC-BN ceramics were investigated systematically. Results showed that ZrB2 induced the structure developments of BN, graphite plates and SiC particles. Consequently, flexural strength reached 378.2 MPa and fracture toughness reached 5.80 MPa.m1/2. Mechanical properties of ZrB2 and Cf reinforced SiC-BN ceramics outperformed the properties of Cf and SiCf reinforced SiC-BN ceramics significantly. SiC-BN/ZrB2/Cf composites showed good thermal shock resistance below 1000℃, where a residual strength of 218 MPa can be obtained for the specimen tested at a temperature difference (ΔT) of 800℃. The enhancing mechanisms can be described as carbon fiber and BN/C plates 'pull-out', 'crack bridging', etc. (author)
Additional details
Publishing Information
- Journal Title
- Transactions of the Indian Ceramic Society
- Journal Volume
- 78
- Journal Issue
- 4
- Journal Page Range
- p. 204-211
- ISSN
- 0371-750X
INIS
- Country of Publication
- India
- Country of Input or Organization
- India
- INIS RN
- 52024691
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- FRACTURE PROPERTIES; MICROSTRUCTURE; SILICON CARBIDES; THERMAL SHOCK; THERMAL STRESSES; ZIRCONIUM BORIDES
- Descriptors DEC
- BORIDES; BORON COMPOUNDS; CARBIDES; CARBON COMPOUNDS; MECHANICAL PROPERTIES; SILICON COMPOUNDS; STRESSES; TRANSITION ELEMENT COMPOUNDS; ZIRCONIUM COMPOUNDS