ダイカスト法による粒子分散型複合材料の諸性質

抄録

  Aluminum matrix composites materials are utilized in many products such as the brake rotor etc due to abrasion resistance and light weight. However, several problems such as uniform dispersion of particles, machinability, reclamation have been occurred during the fabrication process of metal matrix particulate composites. Intermetallic compounds such as NiAl are suitable candidates for use as dispersoids for the purpose of resolving these problems due to the hardness, high temperature resistance and better wetting properties. In this study, aluminum alloy matrix composites dispersion strengthened by the addition of NiAl intermetallic particles were prepared by homogeneously mixing the dispersoid into the melt by a novel technique just prior to die casting. The mechanical properties such as tensile strength and elongation were obtained. Dissolving tests of NiAl dispersoids into aluminum alloy by stirring and melting the composites were conducted to investigate whether they can be used for reclaimed alloys.