Munuera Carmen, Matzelle Thomas Reinhold, Kruse Norbert, López María Francisca, Gutiérrez Alejandro, Jiménez José Antonio, Ocal Carmen
Instituto de Ciencia de Materiales de Madrid, CSIC, Cantoblanco, E-28049 Madrid, Spain.
Acta Biomater. 2007 Jan;3(1):113-9. doi: 10.1016/j.actbio.2006.08.009. Epub 2006 Oct 27.
We report here the first nanoscale surface elasticity measurements on surface-modified titanium alloys using the force spectroscopy mode in scanning force microscopy. Samples of three vanadium-free titanium alloys, Ti-7Nb-6Al, Ti-13Nb-13Zr and Ti-15Zr-4Nb, were investigated. Surface modification of the three alloys was produced by thermal oxidation in air at 750 degrees C for different times, which resulted in the formation of protective oxide layers with different surface composition and morphology. The elastic properties of the surface layers were studied comparatively in the as-received Ti alloys and after the oxidation process using cantilevers with different stiffness to evaluate the influence of the indentation depth. In all cases, Young's modulus of the sample surfaces was found to be lower than 65GPa, and as low as 20GPa for some of the oxidized samples. Variations observed for the three oxidized Ti alloys can be related to the different chemical composition of the outer layers generated for the different oxidation times.
我们在此报告首次使用扫描力显微镜中的力谱模式对表面改性钛合金进行的纳米级表面弹性测量。研究了三种无钒钛合金Ti-7Nb-6Al、Ti-13Nb-13Zr和Ti-15Zr-4Nb的样品。通过在750℃空气中进行不同时间的热氧化对这三种合金进行表面改性，这导致形成了具有不同表面成分和形态的保护性氧化层。使用具有不同刚度的悬臂，对原始钛合金以及氧化处理后的样品表面层的弹性性能进行了比较研究，以评估压痕深度的影响。在所有情况下，发现样品表面的杨氏模量低于65GPa，对于一些氧化样品，低至20GPa。观察到的三种氧化钛合金的变化可能与不同氧化时间产生的外层不同化学成分有关。
