Wear resistant hyper-eutectic aluminum-silicon alloys having sur

Details Wear resistant hyper-eutectic aluminum-silicon alloys having sur Wear resistant hyper-eutectic aluminum-silicon alloys having sur

1991-12-19

1993-12-21

Turner, A. A.

Stock material or miscellaneous articles

Composite

Of metal

148210, 148212, 148238, 428446, 428697, 428698, 428699, 428704, C23C 848

Patent

active

052720152

ABSTRACT:
Hyper-eutectic aluminum-silicon alloys are surface treated with nitrogen and carbon by ion implantation means so as to form hard, wear resistant particles of silicon nitride and silicon carbide which are surrounded by a hard matrix of aluminum nitride and aluminum carbide, depending on the species implanted. During applications where wear resistance is required, the hard silicon-based particles provide the wear resistant phase, thereby shielding the surrounding aluminum-based matrix. Yet the modified aluminum-based matrix is also sufficiently hard so as to provide strength and support for the silicon-based particles. Substantial improvements in wear resistance are obtained for these hyper-eutectic aluminum-silicon alloys, as compared to conventional alloys which have not been treated in accordance with this invention.

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Hickl, "An Alternate to Cobalt-based Hardfacing Alloys", Journ. of Metals, Mar. 1980, pp. 6-12.
Okada, T., et al., "Friction and Wear of Nitrogen Implanted Aluminum Alloy Based FRM", Nuclear Instruments and Methods in Physics Research B37/38, (1989), 724-727.
Appleton, Bill R., et al., "Ion-Beam and Laser-Induced Surface Modifications", Materials Science and Engineering, 70, (1985), 23-51.

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