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首页> 外文期刊>Journal of Iron and Steel Research International >In Situ Laser Coating of Calcium Phosphate on TC4 Surface for Enhancing Bioactivity
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In Situ Laser Coating of Calcium Phosphate on TC4 Surface for Enhancing Bioactivity

机译：在TC4表面上进行磷酸钙原位激光涂层以增强生物活性

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摘要

Titanium alloy has been a successful implant material owing to its excellent ratio of strength to weight, toughness, and bio-inert oxide surface. Significant progress has been made in improving the bioactivity of titanium alloy by coating its oxide surface with calcium phosphates. In the present study, in situ coating was reported on Ti6Al4V(TC4) surface with calcium phosphate (Ca-P) bioceramics synthesized and synchronously cladded by laser beam. This coating was grown by first preplacing directly the raw powders, which contain 80% of CaHPO_4 • 2H_2O, 20% of CaCO_3 , and dram of rare earth (RE) , on the TC4 surfaces, and then exposing the surfaces to the laser beam with a power density of 12. 73 - 15. 27 MW • m~(-2) and a scanning velocity of 10. 5 m/s. The resultant coating was characterized using scanning electron microscopy (SEM) , X-ray diffraction (XRD) , thermogravimetric analysis and Different-thermal''Scanning (TG-DSC), and Energy Dispersive X-ray Detection (EDX). The results show that these laser ceramits include hydroxyapatite (HA) , tricalcium phosphate (TCP) , Ca_2P_2O_7 , and other Ca-P phases, and the interface between the coating and the TC4 substrate has tighter fixation, in which the chemical bonding is approved. These laser hybrid coatings are useful in enhancing the bioactivity of titanium alloy surfaces.
机译：钛合金具有出色的强度重量比，韧性和生物惰性氧化物表面，因此已成为成功的植入材料。通过用磷酸钙涂覆钛合金的氧化物表面，在改善钛合金的生物活性方面取得了重大进展。在本研究中，据报道在Ti6Al4V（TC4）表面用磷酸钙（Ca-P）生物陶瓷合成并通过激光束同步包覆了原位涂层。通过首先在TC4表面上直接制备原始粉末（包括80％的CaHPO_4•2H_2O，20％的CaCO_3和微量的稀土（RE））来制备这种涂层，然后将其表面暴露于激光束中。功率密度为12. 73-15. 27 MW•m〜（-2），扫描速度为10. 5 m / s。使用扫描电子显微镜（SEM），X射线衍射（XRD），热重分析和差热扫描（TG-DSC）以及能量色散X射线检测（EDX）对所得涂层进行表征。结果表明，这些激光陶瓷包括羟基磷灰石（HA），磷酸三钙（TCP），Ca_2P_2O_7和其他Ca-P相，并且涂层与TC4衬底之间的界面具有更牢固的固定，其中化学键被认可。这些激光混合涂层可用于增强钛合金表面的生物活性。

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