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Prediction of Compressive Strength of Biodegradable Mg–Zn/HA Composite via Response Surface Methodology and Its Biodegradation

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Acta Metallurgica Sinica (English Letters) Aims and scope

Abstract

This work aimed to fabricate magnesium zinc/hydroxyapatite (Mg–Zn/HA) composite via powder metallurgy method and to develop a mathematical model to predict the compressive strength of the composite using response surface methodology method. The effect of various mechanical milling parameters, milling speed (200–300 r/min), ball-to-powder weight ratio (5–12.5) and HA content (2.6–10 wt%) on the compressive strength of Mg–Zn/HA composite was investigated. The model shows that high compressive strength of Mg–Zn/HA composite was achieved when the powders were prepared with high milling speed and ball-to-powder weight ratio and low HA content. The mathematical model was adequate with error percentage lower than 3.4%. The microstructure of Mg–Zn/HA composite with different process parameters revealed that fine microstructure was observed at high milling speed and ball-to-powder weight ratio while agglomeration of HA was found in composite with 10 wt% HA. The agglomeration of HA led to degradation of interfacial bonding strength between matrix and reinforcement phases and hence decreased the overall compressive strength of Mg–Zn/HA composite. Biodegradation test revealed that sample with higher HA content had more weight gain and there was more formation of hydroxyapatite. Mg–Zn/HA composite with 8 wt% HA was found to be the best candidate for implant application because it had considerable compressive strength and good biodegradation properties.

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Acknowledgments

The authors would like to thank Ministry of High Education (FRGS Grant No. 6071304) for the financial support.

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Authors and Affiliations

  1. Structural Materials Niche Area Group, School of Materials and Mineral Resources Engineering, Engineering Campus, Universiti Sains Malaysia, 14300, Nibong Tebal, Penang, Malaysia

    Loy Liang Soon, Hussain Zuhailawati & Ismail Suhaina

  2. School of Minerals Metallurgical and Materials Engineering, Indian Institute of Technology Bhubaneswar, Bhubaneswar, 751007, India

    Brij Kumar Dhindaw

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  1. Loy Liang Soon
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  2. Hussain Zuhailawati
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  3. Ismail Suhaina
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  4. Brij Kumar Dhindaw
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Correspondence to Hussain Zuhailawati.

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Available online at http://link.springer.com/journal/40195

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Soon, L.L., Zuhailawati, H., Suhaina, I. et al. Prediction of Compressive Strength of Biodegradable Mg–Zn/HA Composite via Response Surface Methodology and Its Biodegradation. Acta Metall. Sin. (Engl. Lett.) 29, 464–474 (2016). https://doi.org/10.1007/s40195-016-0410-5

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  • DOI: https://doi.org/10.1007/s40195-016-0410-5

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