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Preparation and Characterization of Hydroxyapatite Coating on AZ31 Mg Alloy for Implant Applications

机译:植入物应用AZ31 mg合金对羟基磷灰石涂层的制备与表征

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摘要

Magnesium alloys as biodegradable metal implants in orthopaedic research received a lot of interest in recent years. They have attractive biological properties including being essential to human metabolism, biocompatibility, and biodegradability. However, magnesium can corrode too rapidly in the high-chloride environment of the physiological system, loosing mechanical integrity before the tissue has sufficiently healed. Hydroxyapatite (HAp) coating was proposed to decrease the corrosion rate and improve the bioactivity of magnesium alloy. Apatite has been cathodically deposited on the surface of Mg alloy from solution that composed of 3 mM Ca(H2PO4)2 and 7 mM CaCl2 at various applied potentials. The growing of HAp was confirmed on the surface of the coatings after immersion in SBF solution for 7 days. The coating obtained at −1.4 V showed higher corrosion resistance with bioactive behaviors.
机译:镁合金作为骨科研究中可生物降解的金属植入物,近年来接受了很多兴趣。它们具有吸引人的生物学性质,包括对人类代谢,生物相容性和生物降解性至关重要。然而,镁可以在生理系统的高氯化物环境中腐蚀太快,在组织充分愈合之前减少机械完整性。提出羟基磷灰石(HAP)涂层以降低腐蚀速率并改善镁合金的生物活性。磷灰石已经通过在各种施加电位下由3mM Ca(H2PO4)2和7mM CaCl2组成的溶液的Mg合金表面上的阴极沉积在Mg合金的表面上。在浸入SBF溶液中浸泡7天后,在涂层表面上确认了Hap的生长。在-1.4V下获得的涂层显示出具有生物活性行为的更高的耐腐蚀性。

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