Pressure Sintering Characteristics with Chemical Reaction between Dissimilar Metal Powders by DC Pulse Resistance-Sintering Process.

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  • ＤＣパルス通電加熱焼結法による異種金属素粉末の加圧反応焼結特性
  • DC パルス ツウデン カネツ ショウケツホウ ニ ヨル イシュ キンゾクソ フンマツ ノ カアツ ハンノウ ショウケツ トクセイ

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Abstract

A DC pulse resistance-sintering process is introduced to reduce the long processing time in the net shape sintering process of parts including intermetallic compounds by a hot-pressing (HP) process with chemical reaction between copper and aluminum powders and titanium and aluminum powders. By the DC pulse resistance-sintering mixed powder materials are sintered directly by a phenomenon of microscopic electric discharge between the particles using a DC pulse generator under a punch pressure in a graphite die. The powder mixtures of Cu-33 at % Al and Ti-50 at % Al were milled by a mechanical alloying (MA) process. The MA powder mixtures were sintered using the DC pulse resistance-sintering process. It has been confirmed that the mechanical properties obtained in a short processing time of only about 10 min by the resistance-sintering processes are as same as those in a long processing time of 2-3 hours by the HP process.

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