The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 21, 1993
Filed:
Dec. 19, 1991
Aboud H Hamdi, Detroit, MI (US);
Gerard W Malaczynski, Bloomfield Hills, MI (US);
Alaa A Elmoursi, Sterling Heights, MI (US);
General Motors Corporation, Detroit, MI (US);
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.