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首页> 外文期刊>Journal of biomedical materials research. Part B, Applied biomaterials. >Mechanical properties and Young's modulus of plasma-sprayed hydroxyapatite coating on Ti substrate in simulated body fluid
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Mechanical properties and Young's modulus of plasma-sprayed hydroxyapatite coating on Ti substrate in simulated body fluid

机译：模拟体液中Ti基体上等离子喷涂羟基磷灰石涂层的力学性能和杨氏模量

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This study evaluated the Young's modulus, residual stress and strain, bonding strength, and microstructure of the plasma-sprayed hydroxyapatite coating (HAC) on Ti6Al4V substrate with and without immersion in Hank's balanced salt solution (HBSS). The purpose was to explore the possible correlation of HAC durability and mechanical properties of the coating. The results show that the residual stress and strain, Young's modulus, and bonding strength of the HAC after immersion in HBSS are substantially decreased. The decayed Young's modulus and mechanical properties of HACs are accounted for by the degraded interlamellar or cohesive bonding in the coating due to the increased porosity after immersion that weakens the bonding strength of coating and substrate system. The biologic implications of the research are discussed in detail. This study contributes to the arguments that the method to alleviate the dissolution of HAC will increase the bonding strength of the coating system after immersion, which together with the controlled residual stress and strain in the coating might promote the long-term stability of the HA-coated implant.
机译：这项研究评估了在有或没有浸入汉克平衡盐溶液（HBSS）的情况下，Ti6Al4V基材上等离子喷涂的羟基磷灰石涂层（HAC）的杨氏模量，残余应力和应变，结合强度以及微观结构。目的是探讨HAC耐久性与涂层机械性能之间的可能关系。结果表明，浸入HBSS后，HAC的残余应力和应变，杨氏模量和粘结强度大大降低。 HAC的杨氏模量和机械性能下降是由于浸入后孔隙率增加导致涂层间的层间键合或粘结性降低，从而削弱了涂层与基材体系的结合强度。详细讨论了这项研究的生物学意义。这项研究提出了这样的论点，即减轻HAC溶解的方法将增加浸入后涂层体系的结合强度，这与涂层中受控的残余应力和应变一起可能促进HA-的长期稳定性。涂层的植入物。

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