| 摘要 |
PURPOSE:To obtain a wear resistant fiber reinforced metallic composite material for a sliding member having superior strength, toughness and wear resistance and wearing hardly an opposite member during sliding by dispersing alumina fibers having a high alpha-alumina content as a reinforcing material in a light metal such as Al or Mg. CONSTITUTION:Alumina fibers contg. >=60wt% alpha-alumina, colloidal silica and an org. binder such as starch are dispersed in water. The resulting slurry is vacuum-molded to form a discoidal fibrous molded body 1, and this molded body 1 is baked at 1,200 deg.C for 20min and put in a metallic mold 3. A light metal such as Al or Mg or an alloy thereof is melted, and the molten metal 5 is charged into the mold 3 and solidified under pressure applied by a plunger 6. The alumina fibers as a reinforcing material and dispersed in the light metal or alloy as a matrix, and a wear resistant fiber reinforced metallic composite material for a sliding member having superior wear resistance, strength and toughness and capable of reducing the extent of wear of an opposite member during sliding is obtd.
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