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The microstructure and mechanical and corrosion properties of Mg matrix composites reinforced with bioactive glass: The combined effect of bioactive glass content and extrusion speed

Materials Chemistry and Physics, ISSN: 0254-0584, Vol: 307, Page: 128135
2023
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Article Description

This paper studies the influence of 64SiO 2 –31CaO–5P 2 O 5 bioactive glass particles on the microstructure, and mechanical and corrosion characteristics of AZ91-bioactive glass composite wires fabricated by friction stir back extrusion (FSBE). According to the findings, the extruded composite mostly includes the α -Mg and β -Mg 17 Al 12 phase, as well as the bioactive glass reinforcing phase with a gradient distribution in the AZ91 matrix. The hardness of the FSBE-processed composites increased to 81.32 HV with increasing bioactive glass phase content from 1 to 5 vol % and extrusion speed from 20 to 40 mm/min. In the FSBE-processed composite with 5 vol % bioactive glass particles, the maximum yield strength, ultimate tensile strength, and corrosion resistance of 253.34 ± 9.31 MPa, 298.73 ± 8.95 MPa, and 0.0457 mm/year were obtained, respectively. Compared to AZ91 alloy the polarization resistance in the simulated body fluid solution of AZ91-bioactive glass composite increased and reached 298.21 Ω.cm 2. The use of composite samples in circumstances requiring biodegradable implants seems to be promising.

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