Title:
【発明の名称】超塑性窒化ケイ素ウイスカ強化アルミニウム合金複合材料の製造法
Document Type and Number:
Japanese Patent JPH0635631
Kind Code:
B2
Abstract:
PURPOSE:To manufacture the Al alloy composite in which superplastic deformation is executable by subjecting uniformly mixed powder of alpha-type silicon nitride whiskers and 6000-series Al alloy powder having specified grain size to pressure sintering in vacuum and thereafter subjecting the sintered body to repressing, hot extruding and heat treatment in succession. CONSTITUTION:alpha-type or beta-type silicon nitride whiskers and 6000-series or 7000-series Al alloy powder having <=44mu grain size are charged to an organic solvent such as ethanol by prescribed ratio, to which ultrasonic vibration is applied, and uniform mixing is executed. Next, the organic solvent is vaporized away, and the remaining mixed powder is held, e.g. at about 600 deg.C under about 200MPa pressure for about 20min and is subjected to pressure sintering. Furthermore, the sintered body is subjected to repressing, e.g. at about 600 deg.C under about 400MPa pressure for about 20min in the air, is subjected to hot extruding at about 500 deg.C at about 44 extrusion ratio and is subjected to T6 heat treatment. In this way, the silicon nitride whisker reinforced Al alloy composite executable of superplastic deformation can be obtd.
Inventors:
IMAI TSUNEMICHI
MABUCHI MAMORU
MABUCHI MAMORU
Application Number:
JP24476789A
Publication Date:
May 11, 1994
Filing Date:
September 20, 1989
Export Citation:
Assignee:
KOGYO GIJUTSUIN
International Classes:
C22C47/00; C22C47/14; B22F1/00; C22C49/00; C22C49/06; (IPC1-7): C22C1/09
Attorney, Agent or Firm:
Director, Nagoya Institute of Industrial Technology, AIST