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首页> 外文期刊>Journal of biomedical materials research. Part B, Applied biomaterials. >Glass-Matrix Biocomposites: Synthesis and characterization
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Glass-Matrix Biocomposites: Synthesis and characterization

机译：玻璃基质生物复合材料：合成与表征

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CaO-SiO_2 base glass-matrix/Ti particle biocomposite coatings on Ti6Al4V substrates have been prepared by means of Vacuum Plasma Spray. The base glass is considered bioactive, because, when soaked in a fluid that simulates the inorganic ion concentration of human plasma (SBF), it develops a bonelike apatite layer on its surface. The aim of this research activity was to toughen this brittle bioactive material and to broaden its biomedical applications. Pure titanium was chosen as toughening phase because of its well-known biocompatibility, and Ti6Al4V alloy as substrate because of both its biocompatibility and its mechanical reliability. At first the composites were prepared as bulk materials, by means of a simple sintering process. Then, by ball-milling the sintered composite, the as-obtained "composite powders" were sprayed by Vacuum Plasma Spray (VPS) on the substrate. By means of Differential Thermal Analysis (DTA) and Differential Scanning Calorimetry (DSC), the characteristic temperatures of the base glasses were determined. The thermal properties of mixtures of glass powders and different vol percent Ti particles were studied by means of DTA, DSC, hot-stage microscopy, and dilatometry, with the aim of optimizing the sintering conditions. Both the bulk and the coated samples have been characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), compositional analysis (EDS), Vickers indentations, and leaching tests after soaking in a simulated body fluid (SBF).
机译：Ti6Al4V基底上的CaO-SiO_2基玻璃基体/ Ti颗粒生物复合涂层是通过真空等离子喷涂制备的。基本玻璃被认为具有生物活性，因为当浸入模拟人体血浆无机离子浓度（SBF）的液体中时，它会在其表面形成骨状磷灰石层。这项研究活动的目的是增强这种脆性生物活性材料并扩大其生物医学应用。纯钛因其众所周知的生物相容性而被选作增韧阶段，而Ti6Al4V合金因其生物相容性和机械可靠性而被选作基材。首先，通过简单的烧结工艺将复合材料制成块状材料。然后，通过球磨该烧结的复合材料，通过真空等离子喷涂（VPS）将所获得的“复合粉末”喷涂在基板上。借助差示热分析（DTA）和差示扫描量热法（DSC），确定了基础玻璃的特征温度。通过DTA，DSC，热台显微镜和膨胀分析法研究了玻璃粉末和不同体积百分比的Ti颗粒的混合物的热性能，目的是优化烧结条件。浸入模拟体液（SBF）后，通过X射线衍射（XRD），扫描电子显微镜（SEM），成分分析（EDS），维氏压痕和浸出测试，对块状样品和涂层样品进行了表征。 。

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