Method for fabrication of superplastic composite material having

Details Method for fabrication of superplastic composite material having Method for fabrication of superplastic composite material having

1990-09-14

1991-09-24

Lechert, Jr., Stephen J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Metal and nonmetal in final product

75229, 75244, 419 24, 419 28, 419 29, 419 32, 419 36, 419 60, B22F 324

Patent

active

050512315

ABSTRACT:
A method for the fabrication of a superplastic composite material having metallic aluminum reinforced with silicon nitride includes thoroughly mixing silicon nitride with metallic aluminum, pressure-sintering the resultant mixture, further heating and pressing the sintered mixture, hot extrusion-molding the resultant sintered article, subjecting the molded article, when necessary, to a heat treatment such as the T6 treatment thereby forming a superplastic composite material, and deforming the composite material in a temperature region in which the material exhibits superplasticity.

REFERENCES:
patent: 4797155 (1989-01-01), Das
patent: 4894088 (1990-01-01), Yamaguchi et al.
patent: 4941918 (1990-07-01), Horikoshi et al.
patent: 4946500 (1990-08-01), Zedalis et al.
Superplasticity at High Strain Rates in a SiC Whisker Reinforced Al Alloy, vol. 18, pp. 1405-1408 (1984), T. G. Nieh et al.
Superplasticity in SiC Reinforced Al Alloys, vol. 2 (1986), A Composite Material of 7475 Al Alloy Reinforced with SiC Whiskers; M. W. Mahoney et al., Six International Conference on Composite Materials ICCM and ECCM.
Superplasticity in a High Strength Powder Aluminum Alloy With and Without SiC Reinforcement, Metallurgical Transactions A, vol. 18A (1987), p. 653, A Composite Material of 7064 Al Alloy Reinforced with Minute SiC Particles, M. W. Mahoney et al.
Influence of Anisotropic Distribution of Whiskers on the Superplastic Behavior of Aluminum in a Back-Extruded 6061 Al-20% SiC.sub.w Composite, Composites Science and Technology, 35 (1989), pp. 105-120, G. Gonzalez-Doncel et al.
Superplasticity in Silicon Nitride Whisker Reinforced 2124 Aluminum Alloy Composite, vol. 39, No. 11, Tsunemichi Imai et al., pp. 831-835.

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