Effect of Mg and Zn Composition Variations on Surface Characteristics and Flexural Strength of Biodegradable Mg-Zn-Ca Alloys by Powder Metallurgy Method

Abstract

This study aims to determine the Mg-Zn-Ca alloy's surface characteristics and flexural strength using powder metallurgy methods. The Mg-Zn-Ca alloy was prepared by powder metallurgy method with three composition variations (89Mg-10Zn-1Ca, 93Mg-6Zn-1Ca and 97Mg-2Zn-1Ca). The Mg-Zn-Ca powder alloy was mixed with the dry milling process for 60 minutes. After mixing, the compaction process is carried out with a load of 200 MPa. Then, the sintering process was carried out at a temperature of 500 ℃ and held for 3 hours with a furnace fed with argon gas. The sintering results were characterized by the microstructure of the Mg-Zn-Ca alloy using SEM and XRD. After that, it was carried out to test the flexural strength of the Mg-Zn-Ca alloy. SEM results obtained that the 89Mg-10Zn-1Ca alloy sample has less porosity and a smaller pore diameter compared to the 93Mg-6Zn-1Ca alloy sample and the 97Mg-2Zn-1Ca alloy sample, which has more porosity and has a smaller diameter. Bigger pore. The results from XRD had the highest peak in the 89Mg-10Zn-1Ca alloy sample, seen from a crystalline spectrum of 82.4%. The results of the bending test, the most optimal flexural strength occurred in the 89Mg-10Zn-1Ca alloy sample, which was 0.579 Mpa. The results from XRD had the highest peak that occurred in the 89Mg-10Zn-1Ca alloy sample, seen from a crystalline spectrum of 82.4%. The results of the bending test, the most optimal flexural strength occurred in the 89Mg-10Zn-1Ca alloy sample, which was 0.579 Mpa. The results from XRD had the highest peak in the 89Mg-10Zn-1Ca alloy sample, seen from a crystalline spectrum of 82.4%. The results of the bending test, the most optimal flexural strength occurred in the 89Mg-10Zn-1Ca alloy sample, which was 0.579 Mpa