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Phase characterization and burning rate in the self-propagating high-temperature synthesis of titanium borides

Published online by Cambridge University Press:  03 March 2011

Chi-Won Ahn ,
Oh-Choon Kwon ,
Kurn Cho ,
Hong Yong Sohn  and
Hyung-Bock Lee
Chi-Won Ahn
Affiliation:
Department of Ceramic Science and Engineering, Korea Advanced Institute of Science and Technology, Taejon, Korea
Oh-Choon Kwon
Affiliation:
Department of Ceramic Science and Engineering, Korea Advanced Institute of Science and Technology, Taejon, Korea
Kurn Cho
Affiliation:
Department of Ceramic Science and Engineering, Korea Advanced Institute of Science and Technology, Taejon, Korea
Hong Yong Sohn
Affiliation:
Department of Metallurgical Engineering, University of Utah, Salt Lake City, Utah 84112-1183
Hyung-Bock Lee
Affiliation:
Department of Inorganic Materials, Myung-Ji University, Yongin, Korea
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Abstract

Combustion synthesis of titanium borides from Ti and B binary powder mixtures having molar ratios B/Ti of 1.9 to 2.4 resulted in the formation of TiB2 as the primary phase and TiB as the secondary phase. The amount of TiB decreased when the particle size of the Ti in the powder mixtures became small and when the B content was increased. The results are discussed in terms of the homogeneity of reactant powder mixtures and the degree of boron saturation of the Ti-B melt. The burning rate increased from 11 to 15 mm/s as the titanium particle size decreased from −100 to −325 mesh with the same boron particle size of –325 mesh.

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Type
Articles
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Journal of Materials Research , Volume 10 , Issue 12 , December 1995 , pp. 3179 - 3184
Copyright
Copyright © Materials Research Society 1995

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