Hydrothermal deposition of high strength calcium phosphate coatings on magnesium alloy for biomedical applications

By Ali, Asif; Iqbal, Farasat; Ahmad, Akhlaq; Ikram, Fakhera; Nawaz, Anaum; Chaudhry, Aqif Anwar; Siddiqi, Saadat Anwar; Rehman, Ihtesham
Published in Surface and Coatings Technology 2019

Abstract

Magnesium and Mg-alloys are suitable replacement to metallic implants (Titanium, stainless steel, Co-Cr alloys) in terms of stress shielding effect and repeated surgery requirement. However, the only hindrance in their successful use as biodegradable orthopedic implants is their high corrosion rates in physiological environment. Thus, in present study, we developed the single step hydrothermal process to deposit bioactive coatings that may lower the corrosion rate. Highly crystalline, cytocompatible, bioresorbable and high strength monetite (CaHPO4) coating successfully produced on Ca-containing Mg-alloy via hydrothermal process. Deposition parameters have significant influence on coatings morphology and degree of crystallinity. XRD pattern indicates sharp, intense and well-defined peaks of monetite along with minor peaks of brucite and spinel phases. SEM study reveals that compact and defects free coatings were deposited at 100

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