Effect of different surface oxidation treatments on structural, mechanical and tribological properties of ultrafine-grained titanium
Effect of different surface oxidation treatments on structural, mechanical and tribological properties of ultrafine-grained titanium
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DOI：
10.1016/j.surfcoat.2014.07.073
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发表时间：
2014-11
影响因子：
5.4
通讯作者：
I. Celik;A. Alsaran;G. Purcek
中科院分区：
文献类型：
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作者：
I. Celik;A. Alsaran;G. Purcek
采用阳极氧化（AO）、微弧氧化（MAO）、等离子氧化（PO）和热氧化（TO）四种不同的表面氧化处理方法，对等通道角挤压/挤压（ECAE/P）法制备的超细晶纯钛进行了表面氧化处理。在所有处理前后，对其力学、结构和摩擦学性能进行了研究。经ECAE处理后，纯钛的强度明显提高。tio2相包括锐钛矿和/或在UFG Ti表面形成的金红石，取决于氧化处理。由于在高温下发生再结晶，TO和PO处理使UFG Ti的高强度变差，而MAO和AO的应用由于防止了UFG Ti的再结晶而没有导致其强度的显著降低。所有氧化处理都使UFG Ti的耐磨性显著提高，因为表面形成了粘附且坚硬的tio2膜。综上所述，AO和MAO处理可以在不影响整体力学性能和磨损性能的情况下制备出具有高强度和优异耐磨性的生物相容性纯钛。
Four different surface oxidation treatments, so-called, anodizing oxidation (AO), micro-arc oxidation (MAO), plasma oxidation (PO) and thermal oxidation (TO), were applied to ultrafine-grained (UFG) pure titanium produced by equal-channel angular extrusion/pressing (ECAE/P). Before and after all treatments, mechanical, structural and tribological properties were investigated. The strength of pure titanium increased substantially after ECAE process. TiO2phases included the anatase and/or the rutile formed on the surface of UFG Ti depending on oxidation treatments. High strength of UFG Ti was deteriorated by TO and PO treatments because of the recrystallization occurred at high-temperature, while applications of MAO and AO did not cause a significant decrease in its strength due to the prevention of recrystallization of UFG Ti. All oxidation treatments brought about a remarkable increase in wear resistance of UFG Ti because of the formation of adhered and hard TiO2film developed on the surface. It was concluded that the AO and MAO treatments could be applied to the UFG Ti without any deteriorations in bulk mechanical and wear properties to obtain biocompatible pure titanium with high strength and excellent wear resistance.