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Journal of Polymer & Composites Original Research

Enhanced Mechanical Properties of AZ31 Magnesium Alloy Composite Reinforced with Carbon Nanotubes and Nano hydroxyapatite

  1. Ashu Tyagi Department of mechanical engineering, Deenbandhu Chhotu Ram University of Science and Technology, Murthal, Sonipat
  2. Pardeep Kumar Department of mechanical engineering, Deenbandhu Chhotu Ram University of Science and Technology, Murthal, Sonipat

Abstract

Magnesium alloys represent a novel category of biodegradable materials, offering numerous advantages in addressing the limitations associated with conventional biomedical materials. Magnesium-based metallic biomaterials offer a promising solution for fixing fractures, ensuring effective treatment without the inconvenience of subsequent implant removal procedures. In the present work, AZ31 Mg-alloy was chosen as the base material. Five specimens were meticulously fabricated, each varying in weight percentages of reinforcement materials: 0wt%, 0.5wt%, 1wt%, 2wt%, and 4wt% of carbon nanotubes (CNTs), while the weight of nanohydroxyapatite (nHA) remained constant at 0.5 wt%. Friction stir casting was the chosen fabrication method for the specimens. The EDS results reveals that the components such as C, Zn, Ca, P, O, Mg, and Al are present in desired proportions on the sample surface. Addition of CNTs/nHA significantly enhanced the tensile strength, compressive strength, and micro-hardness of the AZ31 matrix, and values are 25.65%, 153.3%, and 41.26% higher than pure AZ31 matrix, respectively. The porosity of the composites has increased with the increase in the content of CNTs, and its values were 0.43%, 2.18%, 2.34%, 2.48 %, and 5.3% at 0 wt% 0.5 wt%, 1 wt%, 2 wt%, and 4 wt% respectively. The newly developed AZ31 alloy composite is stronger and may be utilised in bone implants and biomedical applications.

Keywords

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