Taira M, Moser J B, Greener E H
Dent Mater. 1989 Jan;5(1):45-50. doi: 10.1016/0109-5641(89)90093-6.
Casting of Ti has been recently investigated in dentistry. The purpose of this study was to examine the alloying effect on the cast Ti. Metallurgical structures, mechanical properties, and in vitro corrosion resistance were, therefore, studied for cast Ti and for four selected cast Ti alloys such as Ti-6AI-4V, Ti-15V, Ti-20Cu, and Ti-30Pd. A "Castmatic" dental casting machine was utilized, which involved argon-arc melting and subsequent argon/vacuum-pressurized casting. The photomicrographs revealed quite large grains in the cast structures. XRD analyses on cast Ti metals showed the quasi-equilibrium phases present. The strength of cast Ti could be significantly increased by alloying. Cross-sectional microhardness measurements of cast Ti alloys showed U-type hardness distribution due to the surface mold reaction. All the cast Ti alloys examined showed a strong passivity trend in the corrosion test. The present results suggest that cast Ti alloys have promising features for future dental uses.
钛铸造最近在牙科领域得到了研究。本研究的目的是考察合金化对铸造钛的影响。因此，对铸造钛以及四种选定的铸造钛合金（如Ti-6AI-4V、Ti-15V、Ti-20Cu和Ti-30Pd）的冶金结构、力学性能和体外耐腐蚀性进行了研究。使用了一台“Castmatic”牙科铸造机，该铸造机包括氩弧焊熔化及随后的氩气/真空加压铸造。金相照片显示铸造组织中有相当大的晶粒。对铸造钛金属进行的XRD分析表明存在准平衡相。通过合金化可以显著提高铸造钛的强度。铸造钛合金的横截面显微硬度测量显示，由于表面铸型反应，硬度呈U型分布。在腐蚀试验中，所有检测的铸造钛合金都表现出很强的钝化趋势。目前的结果表明，铸造钛合金在未来牙科应用中具有良好的特性。
