Development and charactarization of Ti alloys for dentistry

在钛中加入小于10wt%的Fe和Co，提高了合金的维氏显微硬度，降低了镁基包埋料的可铸性。含10wt%Fe的合金与工业纯钛相比，耐蚀性较低。这些合金的硬度值与牙科钴铬合金的硬度值相似。与牙科铸造合金相比，这些合金的机械性能很差。特别是与工业纯钛相比，这些合金表现出较低的切削加工率。希望所开发的钛合金显示出比商业纯钛大1.5或2倍的硬度。在钛中添加Cr和Mo显示出约300 VHN的硬度，该值与牙科铸造金合金的硬度相似或上级。添加有Ag的钛合金显示出较低的硬度（约100%）。200 VHN）比牙科铸造金合金。在钛合金中加入银元素，会加剧铸造过程中银在铸造机中的挥发，从而可能对铸造机造成损坏。Cr和Co的加入降低了包埋料与合金表面的反应性。所有的钛合金与商业纯钛相比都显示出较低的机械加工性。然而，这些合金表现出更大的机械加工性相比，钴铬合金。

The addition of Fe and Co less than 10wt% in titanium increased Vickers microhardness of the alloys and reduced the value of castability into magnesia based investment. The alloy containing 10wt% Fe showed low corrosion resistance compared with the commercially pure titanium. These alloy indicated the hardness value similar to that of dental Co-Cr alloys. The machaniblity of these alloy were very poor compared to that of dental casting alloys. Especially these alloy demonstrated low rate of machinability compared with the commecially pure titnium. Is is to be desired that the developed titanium alloy shows 1.5 or 2 time greater hardness than commercially pure titanium. The addition of Cr and Mo in titanium showed approximately 300 VHN of hardness and this value is similar or superior to the hardness of dental casting gold alloys. The titanium alloy added with Ag indicated the lower hardness (approx. 200 VHN) than the dental casting gold alloys. The addition of Ag in titanium demaontrated the vaporization of Ag in the casting machine during casting and indicated the possibility of damage for the casting machines. The addition of Cr and Co in titnanium deduced the reactivity between the investment material and the alloy surface. All of the titanium alloy indicated low machinability comapred to the commercially pure titanium. However, these alloy showed greater machinability compared with that of the Co-Cr alloy.