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One-step rapid synthesis of a 3D porous surface on Zr-based bulk metallic glass
Surface & Coatings Technology ( IF 5.4 ) Pub Date : 2021-04-28 , DOI: 10.1016/j.surfcoat.2021.127230
Li Sun , Jihua Li , Ruidong Xu , Shiwei He , Zhongsheng Hua , Huan Liu

In this study, a nanoscale 3D porous structure is rapidly synthesized on the surface of a Zr-based BMG by dealloying in solutions containing Cl and F. The influence of the porous surface structure the electrolyte on the preparation of the porous surface structure is studied. The Zr-based BMG is more likely to be passivated when F is added to the HCl solution. The corrosion potential gap between the five components in the alloy increases after the addition of F. The phase transformation and structure formation of a Zr-based BMG during dealloying are studied. The main dissolved elements in the dealloying process are Zr, Ti, and Al. Cu10Zr7, Zr2Ni7 and AlTi3 are the main crystal phases after dealloying, but the Zr-based BMG remains dominated by amorphous phases. The formation of the porous structure can be divided into two stages, the pitting corrosion process and the dealloying process, and these two processes are dominated by Cl and F, respectively. A porous surface structure is beneficial to improve the biomineralization activity of Zr-based BMGs.



中文翻译:

一步法快速合成基于Zr的块状金属玻璃上的3D多孔表面

在这项研究中,纳米级的三维多孔结构迅速提供的锆基BMG的表面上通过在含Cl脱合金合成-和F - 。研究了电解质对多孔表面结构的影响对多孔表面结构制备的影响。在Zr基BMG更可能当F到被钝化-被添加到HCl溶液中。在加入F的后的合金增加五个部件之间的腐蚀电位间隙- 。研究了基于Zr的BMG在脱合金过程中的相变和结构形成。脱合金过程中的主要溶解元素是Zr,Ti和Al。Cu 10 Zr 7,Zr 2 Ni7和AlTi 3是脱合金后的主要晶体相,但Zr基BMG仍以非晶相为主。该多孔结构的形成大致可分为两个阶段,在点蚀处理和脱合金过程,这两个过程被C支配-和F -分别。多孔表面结构有利于提高Zr基BMG的生物矿化活性。

更新日期:2021-05-13
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