Production of metal matrix composites

(19)

(11)

EP 0 271 222 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	12.07.1989 Bulletin 1989/28

(43)	Date of publication A2:
	15.06.1988 Bulletin 1988/24

(21)	Application number: 87309973.3

(22)	Date of filing: 11.11.1987

(51)	International Patent Classification (IPC)⁴: C22C 1/09, B22D 19/14, B22D 27/04

(84)	Designated Contracting States:
	DE ES FR GB IT SE

(30)

Priority:

12.11.1986 US 930327

(71)	Applicant: ALCAN INTERNATIONAL LIMITED
	Montreal Quebec H3A 3G2 (CA)

(72)	Inventors:
	Lloyd, David James Kingston Ontario (CA) Gallerneault, Willard Mark Truman Kingston Ontario K7M 1X8 (CA)

(74)	Representative: Boydell, John Christopher et al
	Stevens, Hewlett & Perkins 1 Serjeants' Inn Fleet Street London EC4Y 1LL London EC4Y 1LL (GB)

(56)

References cited: :

(54)	Production of metal matrix composites

(57) A method of producing a composite cast article having a metal matrix containing divided dispersible solid material, i.e. divided solid filler, such as reinforcing fibres or particles, including the steps of stacking alternating layers (16) of initially solid metal and the dispersible solid (18) in a mold or die (10) having a wall laterally surrounding the stack; heating the wall to raise the temperature of the metal layers (16) above the liquidus, thereby to melt the metal in the stack; and exerting axially directed pressure on the stack to force the molten metal into the layer or layers (18) of dispersible solid, while solidifying the metal by controlling heat flow in such a manner that a solidification front advances unidirectionally, along the cavity axis, entirely through the or each metal-infiltrated filler layer.

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