Sharma Shubham, Dwivedi Shashi Prakash, Li Changhe, Kumar Abhinav, Awwad Fuad A, Khan M Ijaz, Ismail Emad A A
School of Mechanical and Automotive Engineering, Qingdao University of Technology, 266520 Qingdao, China.
Department of Mechanical Engineering, Lebanese American University, Kraytem, Beirut 1102-2801, Lebanon.
ACS Omega. 2024 Apr 17;9(17):18836-18853. doi: 10.1021/acsomega.3c08109. eCollection 2024 Apr 30.
An effort was being made to incorporate waste bagasse ash (WBA) both in carbonized and uncarbonized form into the formulation of Al6063 matrix-based metal matrix composites (MMC's) by partially substituting ceramic particles for them. In the process of developing composites, comparative research on carbonized WBA and uncarbonized bagasse powder was carried out in the role of reinforcement. Microstructure investigations revealed that carbonized WBA particles were properly distributed throughout the aluminum-base metal matrix alloy. They also had the appropriate level of wettability. The reinforcement of carbonized WBA particles in AA6063-based matrix material had a maximum tensile strength of 110 MPa and a maximal hardness of 39 BHN when 3.75 wt % of the particles were used. The deterioration in tensile strength (6.25 wt % of WBA) and the appearance of porosity and blowholes can be enumerated by tensile fractography-based scanning electron microscopy (SEM) analysis. The reinforcement of carbonized WBA particles in AA6063-based matrix material was found to have a maximal percent elongation of 14.42% and the highest fracture toughness of 15 Joules when 1.25 wt % of the particles were employed. For AA6063/3.75 wt % carbonized WBA-based MMC's, the minimum percent porosity was determined to be 5.83, and the minimum thermal expansion was found to be 45 mm. As the percentage of reinforcement in bagasse-reinforced composites increases, the density of the material, the amount of corrosion loss, and the cost all decrease gradually. The AA6063 matrix, with a composition of 3.75 wt % carbonized WBA-based MMC's, had satisfactory specific strength and corrosion loss. The AA6063 alloy composite's microstructure analysis revealed that carbonized WBA enhanced the material's mechanical characteristics, contributing to its excellent mechanical capabilities. The results of the corrosion test showed that carbonized WBA-reinforced composites exhibited reduced weight loss due to corrosion, whereas uncarbonized bagasse powder was an inappropriate reinforcement. The SEM analysis of AA6063 alloy/3.75 wt % carbonized WBA ash reinforcement-based MMC's exposed to a 3.5 wt % NaCl solution has exhibited the development of corrosion pits as a result of localized attack by the corrosive environment. The thermal expansion test showed that the composite with uncarbonized bagasse powder as reinforcement have a high shrinkage rate in comparison with the composite with 3.75 wt %. The composite's mechanical characteristics and thermal stability were enhanced by the presence of hard phases like SiO, AlO, FeO, CaO, and MgO, as revealed by X-ray diffraction analysis. This made it suitable for use in a variety of applications.
人们正在努力将碳化和未碳化形式的废蔗渣灰（WBA）以部分替代陶瓷颗粒的方式纳入Al6063基金属基复合材料（MMC）的配方中。在复合材料的开发过程中，对碳化WBA和未碳化蔗渣粉作为增强材料的作用进行了对比研究。微观结构研究表明，碳化WBA颗粒在铝基金属基体合金中分布均匀，并且具有适当的润湿性。当使用3.75 wt%的碳化WBA颗粒增强AA6063基基体材料时，其最大抗拉强度为110 MPa，最大硬度为39 BHN。基于拉伸断口的扫描电子显微镜（SEM）分析可以列举出当使用6.25 wt%的WBA时抗拉强度的下降以及孔隙和气孔的出现。当使用1.25 wt%的碳化WBA颗粒增强AA6063基基体材料时，发现其最大伸长率为14.42%，最高断裂韧性为15焦耳。对于AA6063/3.75 wt%碳化WBA基MMC，最小孔隙率为5.83，最小热膨胀为45 mm。随着蔗渣增强复合材料中增强材料百分比的增加，材料的密度、腐蚀损失量和成本都逐渐降低。由3.75 wt%碳化WBA基MMC组成的AA6063基体具有令人满意的比强度和腐蚀损失。AA6063合金复合材料的微观结构分析表明，碳化WBA增强了材料的力学性能，使其具有优异的机械性能。腐蚀试验结果表明，碳化WBA增强复合材料的腐蚀失重减少，而未碳化蔗渣粉不是合适的增强材料。对暴露在3.5 wt% NaCl溶液中的AA6063合金/3.75 wt%碳化WBA灰增强基MMC进行SEM分析，结果显示由于腐蚀环境的局部侵蚀出现了腐蚀坑。热膨胀试验表明，与含3.75 wt%碳化WBA的复合材料相比，以未碳化蔗渣粉为增强材料的复合材料收缩率较高。X射线衍射分析表明，复合材料中存在如SiO、AlO、FeO、CaO和MgO等硬质相，增强了复合材料的力学性能和热稳定性，使其适用于多种应用。
