Mechanical modulation and bioactive surface modification of porous Ti-10Mo alloy for bone implants

摘要

The objective of this work was to fabricate a suitable porous Ti-lOMo alloy as the human bone replace ment implants. The porous Ti-lOMo alloy was fabricated by mechanical alloying and then consolidated by powder metallurgy technique. NH4HCO3 powder was used as space-holder. It was indicated that the mean pore size, porosity, compressive strength, and elastic modulus of porous Ti-10Mo alloy could be tailored by the amount of NH4HCO3, and then could be matched with those of human bones. Further more, porous Ti-lOMo alloy was treated by alkali heat treatment and soaked in the 1.5 times simulated body fluid (1.5SBF). It was observed that the surface and the inside pore wall of porous Ti-10Mo alloy with 25 wt.% NH4HCO3 covered with the apatite layer after soaked in 1.5SBF for 28 days. These phenom ena indicated that the surface modified porous Ti-lOMo alloy exhibited a high potential for bone-bond ing, which was expected to be used as bone tissue implant.