Abstract
Magnesium based bio-composites and bio-alloys are used in biomedical applications such as bone fixation, cardiovascular stents, hip joints, screws/pins, and dental implants. Thence, the mechanical properties and corrosion behavior of magnesium-based biocomposites and alloys are of primary importance. In the last three decades, these properties were addressed to bust the development of modern Mg-based bio-composites for biomedical applications. Metallic and ceramic reinforcements such as Ti, Zn, TiO2, MgO, ZnO, ZrO2, TiB2, Al2O3, and SiC are known to be bioactive and bioinert. These, in turns, yield extra mechanical properties respect to the parent magnesium alloys with no reinforcements.
Highlights
IntroductionMg-based bio-alloys are considered to absorb within the human body at an appropriate resorption rate, but they have a problem of a fast degradation rate during tissue remodelling, which limits their applications in clinical fields [13]
The composite material allows the combination of matrix and reinforcement properties such as sufficiently high mechanical properties, corrosion resistance and biocompatibility
Microstructure evolution was inspected by electron microscopy (TEM)
Summary
Mg-based bio-alloys are considered to absorb within the human body at an appropriate resorption rate, but they have a problem of a fast degradation rate during tissue remodelling, which limits their applications in clinical fields [13] For this reason, Mg-based alloys are still considered to be a good choice in the fields of tissue engineering, orthopaedics and cardiovascular stents because of their suitable mechanical properties, reasonable biodegradation and lower toxicity [13]. Numerous opportunities and challenges still exist in developing Mg-based biodegradable composites and alloys for biomedical applications In this sense, Mg-RE alloys (such as the WE series) provide better mechanical properties and corrosion resistance at both room and high temperatures [22].
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