Iron–manganese: new class of metallic degradable biomaterials prepared by powder metallurgy

作者：Hendra Hermawan, Houshang Alamdari, Diego Mantovani, Dominique Dube · 发表于：Powder Metallurgy · 年份：2008 · DOI：10.1179/174329008x284868 · 被引用次数：288 · 研究领域：Magnesium Alloys: Properties and Applications、Aluminum Alloys Composites Properties、Advanced Welding Techniques Analysis

An Fe–35 wt-%Mn alloy, aimed to be used as a metallic degradable biomaterial for stent applications, was prepared via a powder metallurgy route. The effects of processing conditions on the microstructure, mechanical properties, magnetic susceptibility and corrosion behaviour were investigated and the results were compared to those of the SS316L alloy, a gold standard for stent applications. The Fe35Mn alloy was found to be essentially austenitic with fine MnO particles aligned along the rolling direction. The alloy is ductile with a strength approaching that of wrought SS316L. It exhibits antiferromagnetic behaviour and its magnetic susceptibility is not altered by plastic deformation, providing an excellent MRI compatibility. Its corrosion rate was evaluated in a modified Hank's solution, and found superior to that of pure iron (slow in vivo degradation rate). In conclusion, the mechanical, magnetic and corrosion characteristics of the Fe35Mn alloy are considered suitable for further development of a new class of degradable metallic biomaterials.