真空吸渗法制备生物医用相互连续(β-TCP+MgO)/Zn-Mg复合材料的组织和性能
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| Published in | 中国有色金属学报：英文版 Vol. 27; no. 9; pp. 1996 - 2006 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
2017
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1003-6326 |
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| Bibliography: | 43-1239/TG The biomedical co-continuous(β-TCP+MgO)/Zn-Mg composite was fabricated by infiltrating Zn-Mg alloy into porousβ-TCP+MgO using suction exsorption technique.The microstructure,mechanical properties and corrosion behaviors of the composite were evaluated by means of scanning electron microscopy(SEM),X-ray diffraction(XRD),mechanical testing,electrochemical and immersion test.It was found that the molten Zn-Mg alloy had infiltrated not only into the pores but also into the struts of the porousβ-TCP+MgO scaffold to form a compact composite.The Zn-Mg alloy contacted to theβ-TCP+MgO scaffold closely,and no reaction layer can be found between the alloy and the scaffold.The compressive strength of the composite was as high as244MPa,which was about1000times higher than that of the original porousβ-TCP+MgO scaffold and2/3of the strength of the Zn-Mg bulk alloy.The electrochemical and immersion tests in simulated body fluid(SBF)solution indicated that the corrosion resistance of the composite was better than that of the Zn-Mg bulk alloy.The corrosion products on the composite surface were mainly Zn(OH)2.Appropriate mechanical and corrosion properties indicated that the(β-TCP+MgO)/Zn?Mg composite fabricated by suction exsorption would be a very promising candidate for bone substitute. (β-TCP+MgO)/Zn-Mg composite; microstructure; mechanical properties; corrosion behavior; suction exsorption |
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| ISSN: | 1003-6326 |