高温自己伝播反応によるＴｉＢ２粒子分散アルミニウム合金の合成

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タイトル別名
  • Synthesis of TiB2 dispersed aluminum alloys by the self-propagating high-temperature reaction.
  • コウオン ジコ デンパ ハンノウ ニヨル TiB2 リュウシ ブンサン アルミ

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抄録

TiB2 dispersed aluminum alloy was synthesized by the reaction. Starting materials used in this experiment were titanium, AlB12 and AlB2. The heat of reaction between titanium and AlB12 was too high to maintain the original configuration of the powder compact. Thermodynamical calculation reveales that the adiabatic temperature of the reaction between titanium and AlB12 exceeds the boiling temperature of aluminum. Titanium and aluminum were added in the [Ti, AlB12] powder mixture to control the adiabatic temperature of the reaction. The addition of both titanium and aluminum can successfully control the adiabatic temperature. The average size of the TiB2 particles was strongly depends on the amount of titanium added as the diluent of the heat of reaction. As the amount of titanium addition in powder phase increases, the average size of TiB2 particles, synthesized by the reaction, decreases. Differential thermal analysis (DTA) data reveales that the reaction between titanium and AlB2 initiates at around 1280 K (the decomposing temperature of AlB2) whereas the reaction between titanium and AlB12 does not occur at temperatures below 1473 K. The addition of aluminum powder in powder mixture of [Ti, AlB12] system, however, contributes to decreasing the initiation temperature of the reaction.

収録刊行物

  • 軽金属

    軽金属 46 (9), 444-449, 1996

    一般社団法人 軽金属学会

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