Light Alloys, Eco-Materials, and Biomaterials (Room I)Open Access

DEGRADATION BEHAVIOR OF A BIODEGRADABLE Fe-Mn ALLOY PRODUCED BY POWDER SINTERING

QIAN ZHANG

Department of Chemical and Materials Engineering, University of Auckland, New Zealand

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X. G. Wang

School of Materials Science and Engineering, Chang'an University, Xi'an, China

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PENG CAO

Department of Chemical and Materials Engineering, University of Auckland, New Zealand

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, and

WEI GAO

Department of Chemical and Materials Engineering, University of Auckland, New Zealand

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https://doi.org/10.1142/S2010194512004138Cited by:0 (Source: Crossref)

Abstract

Biodegradable stenting and implantation materials have received considerable attention in biomaterials community, with magnesium having been received most wide attention. However, magnesium corrodes too fast by nature, in human body environment. A new type of biodegradable metal – Fe and its alloys – has been introduced in recent years. In this study, a Fe35wt%Mn alloy was produced using powder sintering. Powder mixture was mechanically milled, pressed and then sintered to consolidate powder compacts. Microstructure characterization and hardness measurement were carried out on the as-sintered samples. In vitro degradability evaluation of the samples was performed in 5% NaCl and Simulated Body Fluid (SBF) media. The experimental results show that a higher porosity results in a higher degradation rate. All samples, with porosity being from 6.5% to 12.2 %, revealed a degradation rate from 0.6 to 1.4 mm/year.

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