ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Boron carbide is a very hard material with high abrasive wear resistance. It requires avery high sintering temperature of above 2200 oC to fabricate a monolithic B4C close to thetheoretical density. However, the mechanical property of monolithic B4C is not good enough to useit directly to industrial applications. In this investigation, B4C based ceramic composites werefabricated by in-situ reaction hot pressing using B4C, TiC and SiC powder as starting materials. Thereaction synthesized composites by hot pressing at 1950 oC was found to posses very high relativedensity. The reaction synthesized B4C composites comprise B4C, TiB2, SiC and graphite by thereaction between TiC and B4C. The newly formed TiB2 and graphite was embedded both insidegrain and at grain boundary of B4C. The mechanical properties of reaction synthesized B4C-TiB2-SiC-graphite composites were more enhanced compared to those of monolithic B4C. The flexuralstrength and fracture toughness of these in-situ B4C synthesized composites were 400-570 MPa and6-9.5 MPam1/2, respectively
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.534-536.917.pdf
Permalink