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Effect of Powder Blending Ratio on Synthesis of TiB2 Particles by Al-Ti-B Combustion Reaction

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Abstract:

It is favorable to disperse fine strengthening particles under 1μm to expect the effective dispersion strengthening mechanism of metal matrix composites. In this research, TiB2 particle was synthesized in Al matrix by a combustion reaction and the influence of the powder blending ratio was examined in detail. The mole mixture ratio of Ti and B powder was fixed to B/Ti=2, and the blending ratio of Al powder was varied from 40 to 70vol%. The compacted blended powder was heated under an Ar atmosphere in an induction furnace, and heating was stopped immediately after the combustion reaction took place. The synthesized TiB2 particle became finer by increasing the blending ratio of Al, and the dispersion of particles about 0.3μm was achieved. However, large quantity of Al-Ti intermetallic compounds remained when 70vol% Al was blended, indicating that the combustion reaction was not completed in this specimen.

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Periodical:

Advanced Materials Research (Volumes 26-28)

Pages:

325-328

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.26-28.325

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Online since:

October 2007

Authors:

Wataru Yoshida, Makoto Kobashi, Naoyuki Kanetake

Keywords:

Adiabatic Temperature, Combustion Reaction, In Situ Process, Metal Matrix Composite (MMC), TiB2

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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