Pressureless sintering and properties of αSiC–B4C composite

Autor:	Luigi Pilotti, Giuseppe Magnani, Gian Loris Minoccari, Giancarlo Beltrami
Rok vydání:	2001
Předmět:	Materials science Composite number Sintering chemistry.chemical_element Microstructure Carbide Fracture toughness Flexural strength chemistry visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Ceramic Composite material Boron
Zdroj:	Journal of the European Ceramic Society. 21:633-638
ISSN:	0955-2219
Popis:	Pressureless sintering process to obtain high density silicon carbide–boron carbide (5% vol) composite (BCSiC) was studied. Sintering behaviour of this material was investigated between 1950 and 2200°C and it was compared to SiC material doped with boron and carbon. Density up to 96% T.D. was reached at 2150°C. Microstructural investigation revealed that B 4 C grains, having an average size of 2 μm, were well dispersed in the SiC matrix. Mechanical properties like fracture toughness, hardness, flexural strength were determined in the range RT-1500°C and compared to other SiC-based material. BCSiC material showed same fracture toughness of SSiC, higher hardness and higher flexural strength than SSiC also at high temperature; these properties make BCSiC a very interesting material for application in which high oxidation resistance is requested, e.g. ceramic heat exchanger.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a6e72ef43ca13c516e505d14b5afd597 https://doi.org/10.1016/s0955-2219(00)00244-2 Zobrazit plný text záznamu Full Text from ScienceDirect