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首页> 外文期刊>Journal of Materials Engineering and Performance >Laser Nitriding of the Newly Developed Ti-20Nb-13Zr at.% Biomaterial Alloy to Enhance Its Mechanical and Corrosion Properties in Simulated Body Fluid
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Laser Nitriding of the Newly Developed Ti-20Nb-13Zr at.% Biomaterial Alloy to Enhance Its Mechanical and Corrosion Properties in Simulated Body Fluid

机译：激光氮化新开发的Ti-20NB-13ZR。％生物材料合金，以增强模拟体液中的机械和腐蚀性能

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Despite the widespread application of Ti alloy in the biomedical field, surface treatments are typically applied to improve its resistance to corrosion and wear. A newly developed biomedical Ti-20Nb-13Zr at.% alloy (TNZ) was laser-treated in nitrogen environment to improve its surface characteristics with corrosion protection performance. Surface modification of the alloy by laser was performed through a Nd:YAG laser. The structural and surface morphological alterations in the laser nitrided layer were investigated by XRD and a FE-SEM. The mechanical properties have been evaluated using nanoindentation for laser nitride and as-received samples. The corrosion protection behavior was estimated using electrochemical corrosion analysis in a physiological medium (SBF). The obtained results revealed the production of a dense and compact film of TiN fine grains (micro-/nanosize) with 9.1 mu m below the surface. The mechanical assessment results indicated an improvement in the modulus of elasticity, hardness, and resistance of the formed TiN layer to plastic deformation. The electrochemical analysis exhibited that the surface protection performance of the laser nitrided TNZ substrates in the SBF could be considerably enhanced compared to that of the as-received alloy due to the presence of fine grains in the TiN layer resulting from laser nitriding. Furthermore, the untreated and treated Ti-20Nb-13Zr alloy exhibited higher corrosion resistance than the CpTi and Ti6Al4V commercial alloys. The improvements in the surface hardness and corrosion properties of Ti alloy in a simulated body obtained using laser nitriding make this approach a suitable candidate for enhancing the properties of biomaterials.
机译：尽管Ti合金在生物医学领域普及，但通常施加表面处理以改善其耐腐蚀性和耐磨性。新开发的生物医学TI-20NB-13ZR AT。％合金（TNZ）在氮气环境中激光处理，以改善其具有腐蚀保护性能的表面特性。通过Nd：YAG激光进行激光通过激光进行合金的表面改性。通过XRD和Fe-SEM研究激光氮化层中的结构和表面形态改变。已经使用用于激光氮化物和接收的样品的纳米压纹来评估机械性能。使用生理培养基（SBF）中的电化学腐蚀分析估计腐蚀保护行为。所得结果表明，在表面下方9.1μm的锡粒细粒（微/纳米型）的浓密和紧凑的薄膜的产生。机械评估结果表明形成的锡层的弹性，硬度和电阻模量改善到塑性变形。电化学分析表明，与由激光氮化引起的锡层中存在的粒子层的存在相比，可以显着增强SBF中激光氮化TNZ基材的表面保护性能。此外，未处理和处理的Ti-20NB-13ZR合金比CPTI和Ti6Al4V商业合金表现出更高的耐腐蚀性。使用激光氮化获得的模拟体中Ti合金的表面硬度和腐蚀性能的改善使得这种方法是增强生物材料性质的合适候选者。

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