Nanomechanical properties evaluation of bioactive glass coatings on titanium alloy substrate
Nanomechanical properties evaluation of bioactive glass coatings on titanium alloy substrate
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钛合金基体生物活性玻璃涂层纳米力学性能评价
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
P. Uskokovic
中科院分区：
文献类型：
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作者：
C. Tang;C. Tsui;D. Janaćković;P. Uskokovic
生物惰性金属植入物，如钛和钛合金，可以涂覆生物活性材料，与金属具有良好的粘附性，也可以与骨结合。为了预测植入物插入过程中涂层的机械行为，需要研究沉积的玻璃涂层的表面和整个厚度的机械性能。我们报告了一项调查的机械特性的玻璃涂层使用纳米压痕和纳米划痕技术。采用原位成像方法对残留压痕的涂层形貌进行了分析。的摩擦系数的依赖性，在恒定和斜坡载荷试验中的负载，以及对划痕速度进行比较。在较高载荷下，涂层表面压痕后的弹性模量和硬度结果显示出更一致的结果，压痕周围的堆积更少。涂层的纳米硬度和降低的弹性模量在玻璃和合金的理论值的预期边界内，在整个涂层厚度上具有适度的分布。纳米划痕测试表明，表面塑性变形，没有可见的碎片或裂纹。
Bioinert metallic implants such as titanium and titanium alloys could be coated with bioactive materials with good adhesion to metal and which could be also bonded to the bone. In order to predict the mechanical behavior of coatings during the implant insertion, mechanical properties of the surface and through the thickness of deposited bioglass coatings are necessary to be studied. We report an investigation of the mechanical characteristics of bioglass coatings using the nanoindentation and nanoscratch techniques. The coating topography with residual imprints was analyzed by in situ imaging method. The dependence of the friction coefficient on load in constant and ramped load tests as well as on the scratch speed is compared. Elastic modulus and hardness results after indentation on the coating surface with higher loads showed more consistent results with less pile up around imprints. The nanohardness and reduced elastic modulus of the coating is in the expected boundaries of theoretical values for glass and alloy with a moderate distribution through the coating thickness. Nanoscratch testing showed that the surface deform plastically with no visible debris or cracks.