Abstract
We have developed TiMg alloy for dental material corrosion-resistant to aqueous fluoride solutions. Ti plates and granular Mg was put in a sealed vessel and heated at 950°C, so Ti plates were exposed in the liquid and the vapor Mg phases. The conditions made Mg diffuse into the Ti plates to produce TiMg alloy. The TiMg alloy produced in the vapor Mg phase for 430h achieved homogeneous distribution in Mg concentration of 0.2at%. AVickers micro hardness increased almost linearly with an increase in the Mg concentration, and the hardness of the homogeneous Ti0.2at%Mg was about 1.2 times larger than that of Ti before alloying. It was confirmed that corrosion resistance of Ti in the fluoride solution was improved by alloying with Mg. The method using the vapor Mg phase contributed much more effective improvement of corrosion resistance than that using the liquid phase. The homogeneous Ti0.2at%Mg demonstrated a maximum corrosion resistance of all the specimens, by about 80 times to Ti. [doi:10.2320/matertrans.MC201210]
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