Synthesis Of Hydroxyapatite Reinforced Magnesium Metal Matrix Composite By Powder Metallurgy For Bio Medical Applications

Abstract

ABSTRACT newline newline newline newline newlineRecently, Mg along with their alloys were attracted towards great interest in biomedical applications specifically in the form of biodegradable orthopaedic materials. The Mg alloy density and elastic modulus seem to be closer to natural bone while other materials are only made up of metals. The removal of screws and metal bone plate made of Mg plate is not necessary in second surgery. Certain studies demonstrated that dissolved Mg alloys could promote attachment in bone cell and growth of tissues on implants. Zr is one of the most abundant nutritionally essential elements in the human body. It is considered as a safe element for biomedical applications. When alloyed with Mg, it can improve the corrosion resistance and mechanical properties. HA has received considerable attention as a suitable bio ceramic for the manufacture of osseous implants, because of its excellent osteoconductive and bioactive properties. As a natural bone composition, HA is known to possess a low solubility, high charge transfer resistance and good degradation resistance in human body environment. Mg is often used as an element in biological apatite with HA because it can stimulate osteoblast proliferation and can promote the development of bone besides improving the growing factor during osteogenesis in the early stages. newlineIn this research, Magnesium (Mg) alloy metal matrix reinforced with four weight fractions of (1, 2, 3, 4 wt.%) Hydroxyapatite (HA) [Ca10(PO4)6(OH)2] have been fabricated at different sintering temperatures by using powder metallurgy manufacturing process followed by hot extrusion process for combination. The matrix composition of Mg alloy consists of 0.5wt. % Zr, and balance Mg were processed from high purity (Mggt99.95wt.%). The Mg alloy and composites comprising fifteen samples of different wt.% of HA were prepared. The PM route was used to synthesize (A) Mg/0.5wt.%Zr alloy, (B) Mg/0.5wt.%Zr alloy and (C) Mg/0.5wt.%Zr alloy, (A1) Mg/0.