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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 11    No. 1    February 2001

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Fabrication of hexagonal boron nitride based ceramics
by combustion synthesis
ZHANG Yu-min(张宇民), WANG Hua-bin(王华彬),
HE Xiao-dong(赫晓东),HAN Jie-cai(韩杰才), DU Shan-yi(杜善义)

Center for Composite Materials, Harbin Institute of Technology,
 Harbin 150001, P.R.China

Abstract:Pure h-BN (hexagonal boron nitride) and h-BN based ceramic parts were fabricated by combustion synthesis technique, i.e. self-propagating hightemperature synthesis (SHS). Components were manufactured by the combustion reaction of 80 MPa nitrogen and the compact made by cool isostatic pressing. In h-BN based ceramic parts, h-BN powder was used as diluent and SiO2 powder as reinforcing phase. The density of pure h-BN and h-BN-based ceramic parts were 58% and 78% of theoretical density, respectively. With XRD and SEM, phases and microstructures of ceramic parts were analyzed. Mechanical properties were also tested.

 

Key words: ceramic; combustion synthesis; self-propagating high-temperature synthesis

ISSN 1672-7029
CN 43-1423/U

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