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首页> 外文期刊>Journal of Materials Engineering and Performance >Microstructure, Phase Transformation, Mechanical Behavior, Bio-corrosion and Antibacterial Properties of Ti-Nb-xSn (x=0, 0.25, 0.5 and 1.5) SMAs
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Microstructure, Phase Transformation, Mechanical Behavior, Bio-corrosion and Antibacterial Properties of Ti-Nb-xSn (x=0, 0.25, 0.5 and 1.5) SMAs

机译：Ti-Nb-xsn的微观结构，相变，力学行为，生物腐蚀和抗菌性能（x = 0,0.25,0.5和1.5）Smas

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摘要

Porous Ti-Nb-xSn shape memory alloys (SMAs) are fabricated by microwave sintering technology. The microstructures exhibit needle-like morphologies, ((N)) (normal straight and crossed needles along with needle-like morphology that resembles spaghetti or irregular lines with -phases in between) as well as plate-like morphologies [normal straight plate-like morphology, and dendritic plate-like morphology, ((D))]. Increases in Sn addition significantly induce an increase in the density of the -phase. XRD patterns exhibited three phases, namely the -main phase with smaller intensities of and . Further, the addition of 0.25% Sn led to more effective improvement in the intensity of the -phase compared with 0.5% and 1.5% Sn addition. Additions of Sn also enhanced the fracture strength and its corresponding strain along with the shape memory effect (SME), where the best enhancement was achieved at 0.25% Sn. The corrosion rate (Ri) was reduced by rising Sn content, while both corrosion resistance and antibacterial zones were increased. The lower elastic modulus, as well as the robust mechanical properties and bioactivity, made these SMAs rather suitable for biomedical application purposes, where the low elastic modulus had value in terms of avoiding the problem of stress shielding.
机译：多孔TI-NB-XSN形状记忆合金（SMA）由微波烧结技术制造。微观结构表现出针状形态，（（n））（正常的直线和横频针，以及针状形态，类似于在in之间的意大利面或不规则的线）以及板状形态[正常直板状形态学，和树突状板状形态，（（d））]。随着SN的增加，添加的增加显着诱导 - 相的密度增加。 XRD图案显示出三个阶段，即 - 阶段相强度和较小的阶段。此外，添加0.25％Sn导致与0.5％和1.5％Sn添加的相比之下的静脉强度更有效。 Sn的添加也增强了断裂强度及其相应的应变以及形状记忆效应（中小企业），其中最佳增强在0.25％Sn中实现。通过上升SN含量降低腐蚀速率（RI），而耐腐蚀性和抗菌区也增加。下弹性模量以及鲁棒的机械性能和生物活性使得这些SMA相当适合于生物医学应用目的，其中低弹性模量在避免应力屏蔽问题方面具有值。

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