<p>Magnesium matrix composites are an emerging type of material designed for use in medical implants due to their biocompatibility, meaning they are safe for use in the human body. However, when these implants are placed in the body, they are subjected to continuous movement and interaction with surrounding tissues and fluids, which leads to wear. This wear occurs as a natural process due to friction between the implant and body tissues, as well as from the body's physiological environment. Over time, this wear can affect the performance and longevity of the implant. Therefore, understanding and improving the wear resistance of magnesium matrix composites is essential for developing durable, long-lasting implants that can function effectively inside the body without causing complications. Present work investigates the impacts of hydroxyapatite chemical formula Ca<sub>10</sub>(PO<sub>4</sub>)<sub>6</sub>(OH)<sub>2</sub>&#xa0;represented by HA, on wear behaviour in a prepared magnesium-tin alloy metal matrix composite through powder metallurgy.&#xa0;It was found that Mg–1Sn–7HA had a lower wear rate than Mg–1Sn at every sliding speed evaluated and at sliding velocity of 1.57&#xa0;m/sec, Mg–1Sn–5HA demonstrated a 70.69% improvement in wear resistance compared to Mg-1Sn. The coefficient of friction (COF) has also improved up to 80% at all applied forces. The abrasion and oxidation found to be the leading wear mechanism under the dry condition. Whilst abrasion and delamination were the main factors contributing to wear mechanism in Mg-1%Sn alloy. The outcomes showed that HA particles may be employed in biocompatible magnesium matrix composites as an efficient wear inhibitor.</p>

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Tribological Behaviour of Mg-1%Sn-X%HA Composites for Biomedical Application

  • Sandeep Kumar Jhamb,
  • Ashish Goyal,
  • Anand Pandey

摘要

Magnesium matrix composites are an emerging type of material designed for use in medical implants due to their biocompatibility, meaning they are safe for use in the human body. However, when these implants are placed in the body, they are subjected to continuous movement and interaction with surrounding tissues and fluids, which leads to wear. This wear occurs as a natural process due to friction between the implant and body tissues, as well as from the body's physiological environment. Over time, this wear can affect the performance and longevity of the implant. Therefore, understanding and improving the wear resistance of magnesium matrix composites is essential for developing durable, long-lasting implants that can function effectively inside the body without causing complications. Present work investigates the impacts of hydroxyapatite chemical formula Ca10(PO4)6(OH)2 represented by HA, on wear behaviour in a prepared magnesium-tin alloy metal matrix composite through powder metallurgy. It was found that Mg–1Sn–7HA had a lower wear rate than Mg–1Sn at every sliding speed evaluated and at sliding velocity of 1.57 m/sec, Mg–1Sn–5HA demonstrated a 70.69% improvement in wear resistance compared to Mg-1Sn. The coefficient of friction (COF) has also improved up to 80% at all applied forces. The abrasion and oxidation found to be the leading wear mechanism under the dry condition. Whilst abrasion and delamination were the main factors contributing to wear mechanism in Mg-1%Sn alloy. The outcomes showed that HA particles may be employed in biocompatible magnesium matrix composites as an efficient wear inhibitor.