在3种富含蛋白质的伪生理溶液中的可生物降解Fe基合金中存在的奥氏体,铁体和马氏体的降解行为
Abdelhakim Cherqaoui1, Quang Nguyen Cao1, Maria Laura Gatto2
1Laboratory for Biomaterials and Bioengineering, Canada Research Chair I in Biomaterials and Bioengineering for the Innovation in Surgery, Department of Min-Met-Materials Engineering, Research Center of CHU de Quebec, Division of Regenerative Medicine, Laval University, Quebec City, Canada.
铁--碳合金在模拟的体液中表现出不同的降解. 酸盐缓冲盐水促进了一层保护层,减少腐蚀,而化导致更高的降解.
科学领域:
- 材料科学 材料科学 材料科学
- 生物医学工程 生物医学工程
- 腐蚀科学 腐蚀科学
背景情况:
- 基于Fe的合金是生物医学应用的候选者,因为它们的机械性能.
- 了解这些合金在伪生理环境中的体外降解行为对于它们的临床转化至关重要.
- (Mn) 和碳 (C) 等合金元素显著影响合金性能.
研究的目的:
- 为了研究Fe-C,Fe-5Mn-0.2C和Fe-18Mn-0.6C合金的体外降解.
- 评估不同伪生理溶液 (MHSS,PBS,NaCl) 对合金降解的影响.
- 了解合金元素和溶液化学在降解机制中的作用.
主要方法:
- 静态浸泡试验为期两周.
- 潜在动力学腐蚀试验.
- 降解产品和表面形态的分析.
主要成果:
- Fe-5Mn合金的降解率最高,而Fe-C的降解率最低.
- 降解产品因溶液而异:MHSS/PBS中的酸盐和碳酸盐,在PBS中形成保护层.
- 多孔氧化物是NaCl溶液中主要的降解产物,导致腐蚀加速.
结论:
- 基于Fe的合金的降解行为受到含量和周围溶液的强烈影响.
- 含酸盐的溶液如PBS可以促进稳定的保护层的形成,减轻降解.
- Fe-Mn-C合金表现出可调节的降解特性,突出了它们对各种生物医学应用的潜力.
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