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Published in:
01-10-2012
Development of Nanolayer Hydroxyapatite (HA) on Titanium Alloy via Superplastic Deformation Method
Published in: Metallurgical and Materials Transactions A | Issue 10/2012
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Abstract
In this work, hydroxyapatite (HA) is successfully embedded onto titanium alloy using the superplastic deformation method. An embedded layer of approximately 249 nm is obtained at a temperature of 1200 K (927 °C), strain rate of 1 × 10−4 s−1, and process duration of 90 minutes. X-ray diffraction (XRD) and energy-dispersive X-ray spectroscopy (EDX) analyses indicate that HA is retained after the embedment process, and a significant amount of titanium (Ti) is diffused into the HA, forming a dense HA/Ti composite layer. Wear tests under a simulated body fluids (SBF) condition show that the adherent strength of HA and the interfacial strength between the HA layer and substrate are superior compared with the nonsuperplastic sample.