Aluminium alloys
First Claim
1. An aluminium alloy made by a powder metallurgy route, the aluminium alloy having a structure comprising at least two interpenetrating reticular structures derived from the original powder particles, said at least two reticular structures including a first structure derived from a first alloy powder comprising a near-eutectic aluminium-silicon based material and a second structure derived from a second alloy powder comprising a hypereutectic aluminium-silicon based material, said aluminium alloy being characterised in that the relative proportions of said first and said second structures lie in the range from about 25:
- 75% and 75;
25%, respectively.
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Abstract
An aluminium alloy made by a powder metallurgy route and a method for its production are described. The method comprises the steps of producing a first powder of a near-eutectic aluminium-silicon based alloy; producing a second powder of a hypereutectic aluminium-silicon based alloy; mixing desired proportions of the two powders together; compacting the powder mixture and sintering the compacted powder.
7 Citations
15 Claims
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1. An aluminium alloy made by a powder metallurgy route, the aluminium alloy having a structure comprising at least two interpenetrating reticular structures derived from the original powder particles, said at least two reticular structures including a first structure derived from a first alloy powder comprising a near-eutectic aluminium-silicon based material and a second structure derived from a second alloy powder comprising a hypereutectic aluminium-silicon based material, said aluminium alloy being characterised in that the relative proportions of said first and said second structures lie in the range from about 25:
- 75% and 75;
25%, respectively. - View Dependent Claims (2, 3, 4, 5, 6)
- 75% and 75;
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7. A method for the production of an aluminium alloy by a powder metallurgy route, the method comprising the steps of producing at least a first powder of a near-eutectic aluminium-silicon based first alloy;
- producing at least a second powder of a hypereutectic aluminium-silicon based second alloy;
mixing desired proportions of the at least first and second powders together;
compacting the powder mixture and sintering the compacted powder, the method being characterised in that the desired relative proportions of said first alloy and said second alloy powders lie in the range from 25;
75% and 75;
25%, respectively. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
- producing at least a second powder of a hypereutectic aluminium-silicon based second alloy;
Specification