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US 8,262,814 B2Granted
Composite article and method
OwnerGad Zakinventor
Life of this patent
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Abstract
Method, and articles therefrom, for providing a hard, abrasion-resistant, attractive, oxide surface layer of selectable thickness and having an outer appearance within the scale from gray to blackness, to a zirconium titanium alloy article by heating the article in an oxygen containing atmosphere.
Claims9
A method for producing an article having a darkened surface, the method consisting of the steps of:
- providing an article made from an alloy consisting of between about 18.4% and about 65.6% of zirconium by atomic weight and titanium;
- heating the article in an oxygen containing atmosphere at a temperature of between about 250 and about 880 degrees Celsius for a period between about 10 and about 110 minutes;
- the heating step includes a first heating step, a quenching step following the first heating step, and a second heating step.
Dependencies are inferred from the claim text.