This investigation deals with the utilisation of industrial waste to develop an aluminium (Al)-based composite. Waste eggshell (ES) generated from the food industry has been used as the primary reinforcement material. Waste grinding sludge (GS) produced from the iron-forging sector was utilised as the secondary reinforcement content. Chromium (Cr) was also added to the composite material to prevent the composite material’s grain growth. The composite material was developed by the stir casting process. Experimental results concluded that the tensile strength, compressive strength and hardness of the base material (AA 5052 alloy) had been improved by about 18.02, 23.40 and 49.53%, respectively, by adding 4.5% of ES, 4.5% of GS and 1.5% of chromium. The microstructural analysis of the AA 5052/4.5% ES/4.5% GS/1.5% chromium composite shows the fair distribution of reinforcement content. The X-ray diffraction of the aluminium/4.5% ES/4.5% GS/1.5% chromium composite shows the occurrence of aluminium, ferric oxide (Fe₂O₃), calcium carbonate (CaCO₃), calcium oxide (CaO) and chromium phases. The weight loss due to corrosion and thermal expansion behaviour of the developed composite have also been explored to observe the effect of ES, GS and chromium addition on the aluminium alloy.

中文翻译：

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铬、蛋壳和研磨污泥强化铝金属基复合材料的合成与表征：一种实验方法

本研究涉及利用工业废料开发铝 (Al) 基复合材料。食品工业产生的废蛋壳 (ES) 已被用作主要增强材料。锻铁行业产生的废研磨污泥 (GS) 被用作二次增强材料。铬（Cr）也被添加到复合材料中以防止复合材料的晶粒长大。该复合材料是通过搅拌铸造工艺开发的。实验结果表明，通过添加4.5%的ES、4.5%的GS和1.5%的铬。AA 5052/4.5% ES/4.5% GS/1 的微观结构分析。5% 的铬复合材料显示出强化含量的公平分布。铝/4.5% ES/4.5% GS/1.5% 铬复合材料的 X 射线衍射表明存在铝、氧化铁（Fe₂ O ₃）、碳酸钙（CaCO ₃）、氧化钙（CaO）和铬相。还研究了开发的复合材料因腐蚀和热膨胀行为导致的重量损失，以观察 ES、GS 和铬添加对铝合金的影响。