New Ti-5Ag and Ti-5Ag-35Sn (wt.%) alloys were designed and synthesized by three-dimensional printing (3DP™). The identification of an appropriate binder, densification technique, and densification parameters for fabricating cranio-maxillo-facial prostheses was undertaken using microscopic observations, x-ray diffraction tests, microhardness testing, linear shrinkage and wettability measurements. Moreover, electrochemical tests and surface analysis were used to evaluate the corrosion resistance and passivation behavior of the materials of interest. Silver nitrate was found to be an appropriate inorganic reactive binder for atomized titanium powder. The optimal temperature for densification of as-printed parts using sintering was determined for Ti-Ag alloys. In addition, the type of infiltrant material and use of homogenization in liquid-Sn infiltration was explored for Ti-Ag-Sn alloys. While the Ti-Ag alloy exhibited superior corrosion and mechanical behavior to the Ti-Ag-Sn alloy, the latter showed better dimensional stability.
|Materials Research Society Symposium - Proceedings
|Published - 2001
|Biomaterials for Drug Delivery and Tissue Engineering - Boston, MA, United States
Duration: 27 Nov 2000 → 29 Nov 2000