Back to Search
Start Over
Effect of B4C on the microstructure and properties of B4C modified three-dimensional needled C/C-SiC composites.
- Source :
-
Materials Science & Engineering: A . Oct2017, Vol. 706, p201-210. 10p. - Publication Year :
- 2017
-
Abstract
- The B 4 C were introduced into three-dimensional carbon fiber preform by slurry infiltration (SI), then combined with chemical vapor infiltration (CVI) and liquid silicon infiltration (LSI) to get the B 4 C modified C/C-SiC composites (C/C-B 4 C-SiC). The microstructures, oxidation resistance, mechanical and thermal physical properties of the C/C-B 4 C-SiC were investigated. The results indicated that B 4 C distributed near the fiber surface and mainly in the region of the needle punched fibers, short-cut fiber web layer, and outside of the fiber bundle in non-woven layer. The C/C-B 4 C-SiC possessed good oxidation resistance for B 4 C was easy to oxidize into B 2 O 3 and the product B 2 O 3 could fill in the defects such as pores and cracks to prevent the oxidation. The flexural strength, fracture toughness, and thermal capacity of the C/C-B 4 C-SiC were much higher than those of the C/C-SiC. The B 4 C both can enhance the interface combination with fibers and act as ceramic particles reinforcement. In addition, B 4 C had higher thermal capacity than C, Si or SiC to increase the thermal capacity of the C/C-B 4 C-SiC. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09215093
- Volume :
- 706
- Database :
- Academic Search Index
- Journal :
- Materials Science & Engineering: A
- Publication Type :
- Academic Journal
- Accession number :
- 125311835
- Full Text :
- https://doi.org/10.1016/j.msea.2017.09.008