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Structural Phase States in Nickel-Titanium Surface Layers Doped with Silicon by Plasma Immersion Ion Implantation

机译:通过等离子体浸没离子注入掺杂硅掺杂硅的镍钛表面层中的结构相位

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The paper reports on a study of NiTi-based alloys used for manufacturing self-expanding intravascular stents to elucidate how the technological modes of plasma immersion ion implantation with silicon influence the chemical and phase composition of their surface layers. It is shown that two types of surface structure can be obtained depending on the mode of plasma immersion implantation: quasi-amorphous Si coating and Si-doped surface layer. The Si-doped surface layer contains new phases: a phase structured as the main B2 phase of NiTi but with a lower lattice parameter, R phase, and phase of highly dispersed SiO_2 precipitates.
机译:本文报道了用于制造自扩张血管内支架的氮基合金的研究,以阐明与硅的等离子体浸泡离子注入的技术模式如何影响其表面层的化学和相位。结果表明,取决于等离子体浸没注入的模式可以获得两种类型的表面结构:准无定形Si涂层和Si掺杂的表面层。 Si掺杂的表面层含有新阶段:形成为NITI的主B2相的相位,但具有较低的晶格参数,R相和高度分散的SiO_2沉淀物的相。

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