Takahashi J, Okazaki M, Kimura H, Furuta Y
J Biomed Mater Res. 1984 Apr;18(4):427-34. doi: 10.1002/jbm.820180410.
A Ni-45 wt% 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) investment 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.
采用带有铜坩埚的牙科氩弧压力铸造机，将一种镍含量为45 wt%（镍含量为50 at%）的钛合金铸入氧化镁和二氧化硅包埋料制成的铸模中。铸件表现出形状记忆特性。在氧化镁包埋料铸模中铸造的试样，其形状恢复过程比在二氧化硅（磷酸盐粘结）包埋料铸模中铸造的试样更为明显。后一种铸件周边有一个硬区，这表明形状恢复过程可能受熔融金属与二氧化硅反应的影响。此外，该合金具备作为冠桥修复体的足够机械性能。
