Tantalum-45S5Bioglass composite foams prepared in thermal dealloying process

Add time:08/09/2019    Source:sciencedirect.com

This paper presents a promising method of tantalum – bioglass porous composites preparation by thermal dealloying. The first step of this study was the Ta-Bioglass-Mg nanopowder preparation using the mechanical alloying process in a Spex shaker type mill. The next step was the formation of the green compacts by cold pressing and then sintering and dealloying of magnesium. During the dealloying process, the magnesium diffuses from the middle to the surface of the sample, leaving open spaces surrounded by the composite scaffold. The porosity, pores morphology, structure, phase and chemical composition as well as cytotoxic activity have been investigated. The biocompatible Ta-2.5 wt% 45S5 Bioglass foam composites, of high porosity and wide pore size distribution have successfully been prepared as promising candidates for hard tissue implant applications.

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