Mechanical Engineering Department, Nnamdi Azikiwe University, Awka, Nigeria.
Mechanical Engineering Department, Delta State University, Oleh Campus, Nigeria.
J Appl Biomater Funct Mater. 2024 Jan-Dec;22:22808000241236021. doi: 10.1177/22808000241236021.
This study demonstrates the feasibility of using shell particulates (IGSp) as alternative reinforcing materials in the development of aluminium-based composites. In this experimental study, the microstructure, phase composition, and mechanical behaviour of Al-10Zn-1.63Si/xIGSp (wt%, x = 1, 3, 5 and 7) composites were investigated. The Al-10Zn-1.63Si based composites were fabricated using the stir-casting technique. Different weight percentages (1, 3, 5 and 7) of IGSp were added to the Al-10Zn-1.63Si matrix. The chemical constituents of the IGSp were determined using X-ray fluorescence (XRF). The grain characteristics and phase(s) compositions were determined using Scanning Electron Microscopy (SEM) and X-ray diffractometer (XRD). The ultimate tensile strength, hardness, and impact strength of the developed composites were also determined. The SEM and XRD results revealed the presence of different phases: aluminium phosphate (AlPO), gahnite (ZnAlO), andalusite (AlSiO), Quartz (SiO) and aluminium silicate (AlO.SiO). Results show that addition of IGSp led to an increase in ultimate tensile strength, with the highest value (128 MPa) obtained at 3 wt% IGSp. The hardness of the composites increased with increasing concentrations of IGSp, reaching a maximum value of 285 HV after adding 7 wt% IGSp. The impact strength improved with the addition of IGSp, with the highest value (30 J) obtained at 1 wt% IGSp. The improvements in mechanical properties were attributed to the dispersion of three major phases: aluminium silicate (AlOSiO), AlPO and AlOSiO. These phases contributed to the enhanced strength and hardness of the composites. The study noted a sudden decrease in ultimate tensile strength with higher concentrations of IGSp due to the increase in the intensities of AlPO and precipitation of hard but brittle new phase; AlSi6O126.33. The study concludes that IGSp has the potential to serve as an alternative reinforcing material for aluminium-based composites.
这项研究证明了将贝壳颗粒（IGSp）用作开发铝基复合材料的替代增强材料的可行性。在这项实验研究中，研究了 Al-10Zn-1.63Si/xIGSp（wt%，x=1、3、5 和 7）复合材料的微观结构、相组成和力学性能。使用搅拌铸造技术制备了基于 Al-10Zn-1.63Si 的复合材料。向 Al-10Zn-1.63Si 基体中添加了不同重量百分比（1、3、5 和 7）的 IGSp。使用 X 射线荧光（XRF）确定 IGSp 的化学组成。使用扫描电子显微镜（SEM）和 X 射线衍射仪（XRD）确定晶粒特征和相组成。还确定了所开发复合材料的极限拉伸强度、硬度和冲击强度。SEM 和 XRD 结果表明存在不同的相：磷酸铝（AlPO）、锌铝尖晶石（ZnAlO）、红柱石（AlSiO）、石英（SiO）和铝硅酸盐（AlO.SiO）。结果表明，添加 IGSp 导致极限拉伸强度增加，在添加 3wt%IGSp 时获得最高值（128MPa）。复合材料的硬度随 IGSp 浓度的增加而增加，在添加 7wt%IGSp 后达到 285HV 的最大值。随着 IGSp 的添加，冲击强度提高，在添加 1wt%IGSp 时获得最高值（30J）。机械性能的提高归因于三种主要相的分散：铝硅酸盐（AlOSiO）、AlPO 和 AlOSiO。这些相有助于提高复合材料的强度和硬度。研究注意到，随着 IGSp 浓度的增加，极限拉伸强度会突然降低，这是由于 AlPO 的强度增加和硬但易碎的新相 AlSi6O126.33 的析出所致。研究得出结论，IGSp 有可能成为铝基复合材料的替代增强材料。
