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首页> 外文会议>Symposium on Titanium, Niobium, Zirconium, and Tantalum for Medical and Surgical Applications >Comparative Evaluations of Surface Characteristics of cp Titanium, Ti-6Al-4V and Ti-15Mo-2.8Nb-0.2Si (Timetalreg; 21SRx)
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Comparative Evaluations of Surface Characteristics of cp Titanium, Ti-6Al-4V and Ti-15Mo-2.8Nb-0.2Si (Timetalreg; 21SRx)

机译：CP钛，Ti-6Al-4V和Ti-15Mo-2.8NB-0.2SI（Timetal®21SRX）表面特征的比较评估

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摘要

Commercially pure titanium (cpTi), Ti-6Al-4V (Ti64), and Ti-15Mo-2.8Nb-0.2Si (21SRx), with three unique atomic, alpha, alpha-beta, and beta grain structures, respectively, were subjected to three different surface treatments: cleaning, nitric acid passivation, and heat treatment. Experiments were conducted to determine the effects of the type of material and surface modifications on the substrate microstructure, surface oxide composition and thickness, and resultant corrosion behavior. Metallography showed the cpTi groups were an equiaxed single alpha phase material, the Ti64 groups a dual-phase alpha-beta material, and the 21SRx groups an equiaxed beta material. The different surface treatments did not alter the substrate microstructures of any groups. Spectroscopic (AES) results showed typical titanium and titanium alloy spectra with dominant Ti and O peaks for all sample groups, indicative of titanium dioxide. In addition, small Al and Mo peaks were detected throughout the surface oxides of the Ti64 and 21SRx specimens, respectively. AES depth profiling showed no significant difference in the oxide thickness between all the Cleaned and Passivated groups regardless of metal or alloy group. However, all the Heat Treated groups had significantly thicker oxides. In general, corrosion results showed Passivated and Heat Treated groups to have similar corrosion properties and significantly improved corrosion resistances compared to the Cleaned groups. All impedance spectra fit into the Randies equivalent circuit model, and all sample groups exhibited near ideal capacitivc behavior (Φ ≈ 90°) expected for titanium and its alloys.
机译：进行商业纯钛（CPTI），Ti-6Al-4V（Ti64）和Ti-15MO-2.8NB-0.2SI（21SRX），分别具有三种独特的原子，α，α-β和β晶粒结构三种不同的表面处理：清洁，硝酸钝化和热处理。进行实验以确定材料类型和表面修饰对基底微结构，表面氧化物组合物和厚度的影响，以及所得到的腐蚀行为。金属术显示CPTI基团是等轴的单相α相材料，Ti64基团进行双相α-β材料，21Srx基团等ββ材料。不同的表面处理没有改变任何组的衬底微结构。光谱（AES）结果显示典型的钛和钛合金光谱，具有占所有样品组的显性Ti和O峰，指示二氧化钛。另外，在Ti64和21Srx样本的整个表面氧化物中检测到小的Al和Mo峰。无论金属或合金基团，AES深度分析显示出所有清洁和钝化基团之间的氧化物厚度没有显着差异。然而，所有热处理基团都具有显着较厚的氧化物。通常，腐蚀结果显示出钝化和热处理的基团，以具有相似的腐蚀性和与清洁基团相比具有显着改善的耐腐蚀性。所有阻抗谱都适合RANDIES等效电路模型，所有样品组在钛及其合金的预期预期的理想电容器行为（φ≈90°）附近。

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