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Casting properties of Ni-Ti shape memory alloy

✍ Scribed by Takahashi, Junzo ;Okazaki, Masayuki ;Kimura, Hiroshi ;Furuta, Yasuhiro

Publisher
John Wiley and Sons
Year
1984
Tongue
English
Weight
577 KB
Volume
18
Category
Article
ISSN
0021-9304

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✦ Synopsis

A Ni-45 wt 5% Ti (Ni-50 at % Ti) alloy was cast into molds of magnesia and silica investments by use of a dental argon-arc pressure casting machine with a copper crucible. The castings exhibited shape memory properties. The shape recovery process was sharper in the specimens cast in magnesia investment molds than in those cast in silica (phosphate-bonded) in-vestment molds. The latter casting had a hard region of the periphery, suggesting that shape recovery process may be affected by reaction of molten metal with silica. Furthermore, the alloy possessed the adequate mechanical properties for consideration as crown-and-bridge prostheses.

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