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Open AccessArticle

Enhanced Mechanical Properties of Surface Treated AZ31 Reinforced Polymer Composites

School of Chemical and Materials Engineering, National University of Sciences and Technology (NUST), Sector H-12, Islamabad 44000, Pakistan
Department of Metallurgical & Materials Engineering (MME), University of Engineering and Technology (UET), Lahore 54890, Pakistan
Department of Metallurgy and Materials Engineering, University of Engineering and Technology, Taxila 47050, Pakistan
Department of Mechanical and Industrial Engineering, College of Engineering, Majmaah University, Riyadh 11952, Saudi Arabia
Engineering and Applied Science Research Center, Majmaah University, Riyadh 11952, Saudi Arabia
Department of Mechanical Engineering, College of Engineering, Prince Sattam bin Abdulaziz University, AlKharj 11942, Saudi Arabi
Authors to whom correspondence should be addressed.
Crystals 2020, 10(5), 381;
Received: 3 March 2020 / Revised: 3 April 2020 / Accepted: 9 April 2020 / Published: 8 May 2020
To enhance the potential application of naturally biodegradable polylactic acid (PLA)-based composites reinforced with magnesium alloy, anodized coatings between Mg and PLA were fabricated on AZ31 magnesium alloy rods. After anodizing (AO) at four different treatment times, the surface demonstrated a typical porous MgO ceramics morphology, which greatly improved the mechanical properties of composite rods compared to untreated pure Mg. This was attributed to the micro-anchoring effect, which increases interfacial binding forces significantly between the Mg rod and PLA. Additionally, the AO layer can also substantially improve the degradability of composite rods in Hank’s solution, due to good corrosion resistance and stronger bonding between PLA and Mg. With a prolonged immersion time of up to 30 days, the porous MgO coating was eventually found to be degraded, evolving to a comparatively smooth surface resulting in a decline in mechanical properties due to a decrease in interfacial bonding strength. According to the current findings, the PLA-clad surface treated Mg composite rod may hold promise for use as a bioresorbable implant material for orthopedic inner fixation. View Full-Text
Keywords: interface; mechanical properties; anodizing; surface treatment; degradation interface; mechanical properties; anodizing; surface treatment; degradation
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Butt, M.S.; Maqbool, A.; Umer, M.A.; Saleem, M.; Malik, R.A.; Alarifi, I.M.; Alrobei, H. Enhanced Mechanical Properties of Surface Treated AZ31 Reinforced Polymer Composites. Crystals 2020, 10, 381.

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