Novel biodegradable Fe-Mn-C-S alloy with superior mechanical and corrosion properties
Novel biodegradable Fe-Mn-C-S alloy with superior mechanical and corrosion properties
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DOI：
10.1016/j.matlet.2016.10.037
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发表时间：
2017-01-01
影响因子：
3
通讯作者：
Gebert, A.
中科院分区：
文献类型：
--
作者：
Hufenbach, J.;Wendrock, H.;Gebert, A.
铁基合金由于其广泛的性能和优异的加工性能，被认为是潜在的可生物降解植入材料。在这项研究中，Fe-30 Mn-1C和新型微合金化Fe-30 Mn-1C-0.025S在快速凝固条件下制备，导致细晶奥氏体基体相。用电子背散射衍射证实了微合金化的结果是形成了细小的MnS沉淀。与临床应用316 L相比，这些沉淀物导致屈服强度和极限强度显著增加，并且初始腐蚀机制发生变化，导致在模拟体液（SBF）中的腐蚀速率增加，这通过电化学极化测试进行了评估。
Due to their broad range of properties and excellent processability, Fe-based alloys are considered as potentia biodegradable implant materials. In this study, Fe-30Mn-1C and novel microalloyed Fe-30Mn-1C-0.025S were prepared under fast solidification conditions leading to a fine grained austenitic matrix phase. Microalloying with S results in the formation of fine MnS precipitates, which was proven by electron backscatter diffraction. These precipitates cause a significantly increased yield and ultimate strength, also compared to clinical applie 316L, and a change in the initial corrosion mechanisms leading to an enhanced corrosion rate in simulated body fluid (SBF), which was assessed by electrochemical polarization tests.