Mechanical behavior of nanoparticulate TiO2 reinforced magnesium matrix composite

International conference on Materials Engineering and characterization

工业技术（总论）;材料科学

Radhakrishnan, Ganesh^1 ; Anirudh, P.V.^1 ; Anujan Kumar, S.^1

Department of Mechanical Engineering, Velammal Engineering College, Chennai

600 066, India^1

关键词: biomedical;    Bone implant;    Magnesium matrix composite;    Mechanical behavior;    Nano particulates;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/574/1/012006/pdf
DOI  :  10.1088/1757-899X/574/1/012006

来源: IOP

【 摘 要 】

In this study, nano-sized titanium dioxide particulate reinforced pure magnesium matrix composite has been fabricated by powder metallurgy technique for five different weight fractions of reinforcement such as 4 wt%, 8 wt%, 12 wt%, 16 wt%, and 20 wt% respectively. Samples of these compositions are iso-statically cold compacted into cylindrical specimens of diameter and length each 15 mm respectively, followed by sintering and hot extrusion with an extrusion ratio of 1.56:1. SEM micrographs of blended composite powders before compaction confirmed the uniform distribution of reinforcement throughout the matrix without any agglomeration. Microstructural analysis of extruded specimens revealed the refined matrix grains and grain boundary. The reinforcement may interrupt the matrix grain growth on grain boundaries during extrusion. Targeting for biomedical applications like bone implants, kneecap surgery etc., the mechanical behavior of the composite such as microhardness, and compressive strength have been studied. It was observed from the study that the mechanical properties have been significantly improved by adding reinforcement compared to pure magnesium and better mechanical behavior have been noticed for composite with higher contribution of reinforcement.