Ming-Shi Song

I am Ming-Shi Song, a PhD candidate at RMIT University. I started my PhD project on Multifunctional Coatings for Biomedical Mg alloys in 2017.

I received my Bachelor’s degrees in Material Formation and Control Engineering & Software Engineering from Dalian Jiaotong University in China in 2012. In the years that followed, I achieved three different master's degrees, Master of Advanced Engineering Materials from University of Manchester (UK) and Master of Advanced Engineering (Mechanical) & Master of Business from Monash University (Australia). I have strong research interests in biomaterials, light alloys and surface modification. I hope that my research can be used in the medical care field to alleviate unnecessary pain and expense for patients.   

Skills

  • Various phosphate conversion coatings preparation for Mg alloys
  • Multifunctional coatings preparation deposited by DC/RF sputtering system (Anatech Hummer BC-20) and Micro-arc Oxidation process
  • Microscopy analysis (X-ray powder diffraction, Scanning electron microscopy, X-ray photoelectron spectroscopy, energy-dispersive X-ray spectroscopy)
  • Electrochemical analysis (potentio-dynamic and static polarisation curves, electrochemical impedance spectroscopy, scanning electrochemical microscopy)
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PhD Project

Topic: Multifunctional Coatings for Biomedical Mg Alloys    

Magnesium (Mg) and its alloys are emerging materials for biomedical applications owing to their desirable mechanical and biological features. However, their clinical applications are significantly restricted by the rapid and uncontrollable degradation progress, which gives rise to hydrogen gas evolution, deterioration of mechanical strength and dramatic changes in local pH in chloride-rich physiological environments, such as human body fluid. Furthermore, a feasible coating strategy is required to yield biomedical Mg implants in vivo with satisfactory biocompatibility and controlled biodegradation. In addition, it is of great significance to tackle device-associated infections caused by dwelling of pathogen colonies on the surface of biomedical implants. Existing research explores either protective coatings with reduced degradation rate or techniques to suppress pathogenic infection issues of Mg-based implants. It is a pressing requirement to discover a sound and efficient solution to these two key issues at the same time as clinical implementation of biomedical Mg alloys.

This project aims to develop gallium phosphate (GaPO4)-based multifunctional coatings, which not only suppress the initial degradation kinetics of Mg alloys but also reduce the risk of implant-associated infections through sustainable release of antibacterial agents (i.e. Ga3+ ions) from coatings into the surrounding tissue during the degradation process. Though Ga3+ ions are a well-recognised broad-spectrum antibacterial element, their use in the formation of protective coatings for Mg alloys is yet to be assessed. In this study, protective coatings containing Ga3+ ions as germ-killer will be prepared through several techniques including cost-effective chemical conversion methods and RF magnetron sputtering deposition to yield a variety of microstructures, chemical compositions and thus dissolution rates. Physical, chemical, electrochemical and antibacterial features will be characterised by SEM-EDX, FIB-TEM, XRD, XPS, potentio-dynamic and static polarisation curves, EIS, SECM and in vitro cell and bacteria cultures. It is anticipated that this new series of coatings will open up new possibilities for the clinical application of degradable Mg alloys with desired functionality in terms of both corrosion and bacterial resistance.       

Prior Work

  • 05/2014 - 03/2015: The national key research development plan (State Project’973’) - Modification research for key parts of the nuclear main pump in the Surface Engineering Laboratory, Dalian University of Technology.
  • 05/2013 - 09/2013: Project atmospheric-induced corrosion of cold worked grade 2205 duplex stainless steel in Corrosion and Protection Centre (CPC) & Materials Performance Centre (MPC), School of Materials, University of Manchester, UK    

Publications

  • M.-S. Song et al., "Recent advances in biodegradation controls over Mg alloys for bone fracture management: A review," Journal of Materials Science & Technology, IN PRESS, 2018.    

Awards

Best ECR Session Oral Presentation, International Symposium on Advanced Materials & Sustainable Technologies 2018 (AM&ST18), Brisbane (Australia), 22-25 July 2018.

Further Information

  • Senior Supervisor: Dr Xiao-Bo Chen (RMIT University)
  • Associate Supervisor: Prof Ivan Cole (RMIT University)        

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Acknowledgement of country

RMIT University acknowledges the people of the Woi wurrung and Boon wurrung language groups of the eastern Kulin Nation on whose unceded lands we conduct the business of the University. RMIT University respectfully acknowledges their Ancestors and Elders, past and present. RMIT also acknowledges the Traditional Custodians and their Ancestors of the lands and waters across Australia where we conduct our business. - Artwork created by Louisa Bloomer