Impact of Microstructural and Surface Modifications on the Ti-45Nb Alloy’s Response to Bio-Environment

IF 2.9 2区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING Acta Metallurgica Sinica-English Letters Pub Date : 2024-04-22 DOI:10.1007/s40195-024-01705-0

Ivana Cvijović-Alagić, Slađana Laketić, Miloš Momčilović, Jovan Ciganović, Jelena Bajat, Vesna Kojić

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Abstract

The Ti-45Nb (mass%) alloy’s corrosive and biocompatible response in simulated physiological conditions was investigated before and after its additional high-pressure torsion (HPT) and laser irradiation processing. The grain size reduction from 2.76 µm to ~ 200 nm and the appearance of laser-induced morphologically altered and highly oxidized surface led to the significant improvement of alloy corrosion resistance and cell–implant interaction. Moreover, an additional increase of the laser pulse energy from 5 to 15 mJ during the alloy irradiation in the air led to an increase in the surface oxygen content from 13.64 to 23.89% accompanied by an increase of excellent cell viability from 127.18 to 134.42%. As a result of the controlled alloy microstructural and surface modifications, the formation of protective bi-modal mixed Ti- and Nb-oxide external scale was enabled. The presence of this surface oxide scale enhanced the alloy’s resistance to corrosion deterioration and simultaneously boosted cell viability and proliferation.

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微结构和表面改性对 Ti-45Nb 合金对生物环境反应的影响

研究了Ti-45Nb（质量百分数）合金在模拟生理条件下的腐蚀性和生物相容性，以及在经过额外的高压扭转（HPT）和激光辐照处理前后的反应。晶粒尺寸从 2.76 µm 减小到约 200 nm，并出现了激光诱导的形态改变和高度氧化表面，从而显著提高了合金的耐腐蚀性和细胞与植入物的相互作用。此外，在空气中对合金进行辐照时，将激光脉冲能量从 5 mJ 提高到 15 mJ，可使表面氧含量从 13.64% 提高到 23.89%，同时使细胞存活率从 127.18% 提高到 134.42%。由于对合金微观结构和表面进行了可控改性，形成了保护性双模钛和铌混合氧化物外部鳞片。这种表面氧化物鳞片的存在增强了合金的抗腐蚀性，同时提高了细胞活力和增殖能力。

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来源期刊

Acta Metallurgica Sinica-English Letters METALLURGY & METALLURGICAL ENGINEERING-

CiteScore

6.60

自引率

14.30%

发文量

122

审稿时长

2 months

期刊介绍： This international journal presents compact reports of significant, original and timely research reflecting progress in metallurgy, materials science and engineering, including materials physics, physical metallurgy, and process metallurgy.