Nickel/titanium/niobium shape memory alloy & article
First Claim
Patent Images
1. A shape memory alloy, which has been thermo-mechanically treated to exhibit shape memory properties, comprising nickel, titanium, and niobium within an area defined on a nickel, titanium, and niobium pseudo-binary phase diagram by a quadrilateral with its first vertex at 48 atomic percent titanium, 49.5 atomic percent nickel, and 2.5 atomic percent niobium;
- its second vertex at 37.5 atomic percent titanium, 32.5 atomic percent nickel, and 30 atomic percent niobium;
its third vertex at 33.7 atomic percent titanium, 36.3 atomic percent nickel, and 30 atomic percent niobium; and
its fourth vertex at 45.5 atomic percent titanium, 52 atomic percent nickel, and 2.5 atomic percent niobium, wherein said shape memory alloy has an Ms temperature between about 30°
C. and -96°
C.
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Abstract
Disclosed are a group of nickel/titanium/niobium alloys wherein the niobium varies from about 2.5 to 30 atomic percent. Also disclosed is an aritcle made from these nickel/titanium/niobium alloys.
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Citations
13 Claims
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1. A shape memory alloy, which has been thermo-mechanically treated to exhibit shape memory properties, comprising nickel, titanium, and niobium within an area defined on a nickel, titanium, and niobium pseudo-binary phase diagram by a quadrilateral with its first vertex at 48 atomic percent titanium, 49.5 atomic percent nickel, and 2.5 atomic percent niobium;
- its second vertex at 37.5 atomic percent titanium, 32.5 atomic percent nickel, and 30 atomic percent niobium;
its third vertex at 33.7 atomic percent titanium, 36.3 atomic percent nickel, and 30 atomic percent niobium; and
its fourth vertex at 45.5 atomic percent titanium, 52 atomic percent nickel, and 2.5 atomic percent niobium, wherein said shape memory alloy has an Ms temperature between about 30°
C. and -96°
C. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- its second vertex at 37.5 atomic percent titanium, 32.5 atomic percent nickel, and 30 atomic percent niobium;
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9. A shape memory article comprising a shape memory alloy, which has been thermo-mechanically treated to exhibit shape memory properties, comprising nickel, titanium, and niobium within an area defined on a nickel, titanium, and niobium pseudo-binary phase diagram by a quadrilateral with its first vertex at 48 atomic percent titanium, 49.5 atomic percent nickel, and 2.5 atomic percent niobium;
- its second vertex at 37.5 atomic percent titanium, 32.5 atomic percent nickel, and 30 atomic percent niobium;
its third vertex at 33.7 atomic percent titanium, 36.3 atomic percent nickel, and 30 atomic percent niobium; and
its fourth vertex at 45.5 atomic percent titanium, 52 atomic percent nickel, and 2.5 atomic percent niobium, wherein said shape memory alloy has an Ms temperature between about 30°
C. and -196°
C. - View Dependent Claims (10, 11, 12, 13)
- its second vertex at 37.5 atomic percent titanium, 32.5 atomic percent nickel, and 30 atomic percent niobium;
Specification