Bone-like apatite formation on HA/316L stainless steel composite surface in simulated body fluid |
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Authors: | FAN Xin CHEN Jian ZOU Jian-peng WAN Qian ZHOU Zhong-cheng RUAN Jian-ming |
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Affiliation: | State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China |
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Abstract: | HA/316L stainless steel(316L SS) biocomposites were prepared by hot-pressing technique. The formation of bone-like apatite on the biocomposite surfaces in simulated body fluid(SBF) was analyzed by digital pH meter, plasma emission spectrometer, scanning electron microscope(SEM) and energy dispersive X-ray energy spectrometer(EDX). The results indicate that the pH value in SBF varies slightly during the immersion. It is a dynamic process of dissolution-precipitation for the formation of apatite on the surface. With prolonging immersion time, Ca and P ion concentrations increase gradually, and then approach equilibrium. The bone-like apatite layer forms on the composites surface, which possesses benign bioactivity and favorable biocompatibility and achieves osseointegration, and can provide firm fixation between HA60/316L SS composite implants and human body bone. |
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Keywords: | hydroxyapatite 316L stainless steel biocomposites simulated body fluid bone-like apatite |
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