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首页> 外文期刊>International Journal Cast Metals Research >Effect of ball-milled MgO and Si3N4 addition on the physical, mechanical and thermal behaviour of aluminium based composite developed by hybrid casting technique
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Effect of ball-milled MgO and Si3N4 addition on the physical, mechanical and thermal behaviour of aluminium based composite developed by hybrid casting technique

机译：滚珠研磨MgO和Si3N4的影响对混合铸造技术开发的铝基复合材料物理，机械和热行为的影响

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摘要

Composite material via hybrid casting techniques. Ball-milling of Si3N4 and MgO powder was carried out for 100 hours to obtain in single entity particles. MgO powder is used to enhance wettability property of composite with Si3N4 reinforcement in AA2024 aluminium alloy. However, MgO was also responsible to improve tensile strength and hardness of composite material. Microstructure results showed the fair distribution of reinforcement particles developed by the hybrid casting technique. Maximum tensile strength and hardness were found to be 219.55 MPa and 80.86 BHN for ball-milled AA2024/7.5 % Si3N4/5% MgO composite material as heat treated. Minimum thermal expansion was also found for composition AA2024/7.5% Si3N4/5% MgO composite. However, minimum corrosion loss was observed for composition AA2024/10% Si3N4/2.5% MgO composite material. Though, toughness and ductility were reduced by adding the Si3N4 and MgO particles in AA2024 aluminium alloy. XRD result showed the presence of SiO2, Mg, Al, Si3N4, Cu and MgO in ball-milled AA2024/7.5% Si3N4/5% MgO composite material.
机译：复合材料通过混合铸造技术。进行Si3N4和MgO粉末的球磨为100小时以获得单一实体颗粒。 MgO粉末用于增强AA2024铝合金Si3N4增强材料的复合材料的润湿性。然而，MgO还负责改善复合材料的拉伸强度和硬度。微观结构结果表明，杂交铸造技术开发的增强颗粒的公平分布。在热处理中，发现最大拉伸强度和硬度为219.55MPa和80.86bHn，如热处理为热处理的MgO3N4 / 5％MgO复合材料。还发现了组合物AA2024 / 7.5％Si3N4 / 5％MgO复合材料的最小热膨胀。然而，对于组合物AA2024 / 10％Si3N4 / 2.5％MgO复合材料，观察到最小腐蚀损失。但是，通过在AA2024铝合金中添加Si3N4和MgO颗粒，减少了韧性和延展性。 XRD结果显示，球磨AA2024 / 7.5％Si3N4 / 5％MgO复合材料中SiO 2，Mg，Al，Si3N4，Cu和MgO存在的存在。

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