Abstract
Magnesium rare earth element (Mg-REE) alloys are actively used as bone implants in orthopedic applications due to their biocompatibility, strengthening ability and degradation rate. Pure Mg when casted has low strength and high rate of degradation. Properties of magnesium alloys can be strengthened and improved by using suitable alloying elements and processing conditions. When Magnesium, alloyed with elements like Al, Ca, Zn, Sr and rare earth elements (REE) used as reinforcing elements, gains high strength, better mechanical, metallurgical, and tribological property due to grain refinement and strong solution reinforcing mechanisms of the alloyed elements. This helps in developing Mg-REE alloy, which is a promising substitute for permanent bone implants due to biodegradability in the physiological environment i.e. inside the human body. In this research work using gravity casting process, by varying the elemental composition of Gadolinium (Gd) in Mg-2Sr, Mg-REE alloy of Mg-2Sr, Mg-2Sr-2Gd, Mg-2Sr-4Gd, Mg-2Sr-8Gd, Magnesium – Strontium – Gadolinium REE alloy is casted using gravity casting method and the tribological properties like wear rate, wear resistance, and coefficient of friction of Mg-REE alloy are investigated.
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