• Magnesium/fish bone derived hydroxyapatite composites by friction stir processing: studies on mechanical behaviour and corrosion resistance

• # Fulltext

https://www.ias.ac.in/article/fulltext/boms/042/03/0122

• # Keywords

Composites; magnesium; fish bone; naturally derived hydroxyapatite; corrosion; FSP.

• # Abstract

Magnesium (Mg)-based biomaterials are widely investigated for degradable implant applications. Developing Mg-based composites is one of the strategies adopted to increase the bioactivity and to reduce the degradation rate of Mg. In the present study, hydroxyapatite (fHA) has been produced from fish bones and incorporated into pure Mg sheets by friction stir processing (FSP). Microstructures of the composites clearly revealed the grain refinement in the stir zone up to 10 $\mu$m from the starting size of 2000 $\mu$m. Measurements of microhardness also indicated the effect of a smaller grain size and the presence of fHA on increasing the hardness in composites. Interestingly from the tensile tests, mechanical properties, such as yield strength and ultimate tensile strengths were measured as they decreased for the composite due to the presence of fHA particles. However, the observed % elongation of the composite was similar to that of a natural bone. From the electrochemical tests, the composite exhibited an enhanced corrosion performance. From the results, it can be concluded that the cost-effective Mg–fHA composites can be developed by FSP for degradable scaffold applications in biomedical fields.

• # Author Affiliations

1. Department of Mechanical Engineering, Rajiv Gandhi University of Knowledge Technologies (AP-IIIT), Nuzvid 521202, India
2. Department of Metallurgical and Materials Engineering, Rajiv Gandhi University of Knowledge Technologies (AP-IIIT), Nuzvid 521202, India
3. Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai 600036, India
4. Department of Soil Science and Geology, Faculty of Agrobiology and Food Resources, Slovak University of Agriculture in Nitra, Trieda A. Hlinku 2, 949 76 Nitra, Slovak Republic
5. Department of Chemistry, Rajiv Gandhi University of Knowledge Technologies (AP-IIIT), Nuzvid 521202, India
6. Department of Mechanical Engineering, Visvesvaraya National Institute of Technology, Nagpur 440010, India
7. Department of Mechanical Engineering, Bapatla Engineering College, Bapatla 522101, India

• # Bulletin of Materials Science

Volume 44, 2021
All articles
Continuous Article Publishing mode

• # Dr Shanti Swarup Bhatnagar for Science and Technology

Posted on October 12, 2020

Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
Chemical Sciences 2020