| 原位Al2O3颗粒增强ADC12复合材料的制备与组织的研究 |
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| 引用本文： | 贺儒,闫洪,钟卫民.原位Al2O3颗粒增强ADC12复合材料的制备与组织的研究[J].铸造,2012,61(4):396-399. |
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| 作者姓名： | 贺儒 闫洪 钟卫民 |
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| 作者单位： | 1. 南昌大学机电工程学院材料加工工程系,江西南昌,330031
2. 抚州职业技术学院,江西抚州,344000 |
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| 基金项目： | 国家自然科学基金资助项目(51165032);江西省教育厅资助项目(GJJ11269);江西省高等学校科技创新团队资助项目(00008713) |
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| 摘 要： | 将Al粉和B2O3粉球磨并压制成预制块,然后破碎成混合粉末加入ADC12铝熔体,采用高能超声—熔体直接反应法,并在585℃保温15 min制备了Al2O3颗粒增强ADC12复合材料.用XRD、SEM及EDS分析第二相的分布、形貌以及成分,用金相显微镜分析复合材料的半固态组织.结果表明:利用Al-B2O3体系制备了原位Al2O3颗粒增强ADC12复合材料,生成的Fe2B减少了复合材料中的杂质Fe,复合材料半固态组织细小、均匀、圆整,且硬度随着加入的混合粉末的质量分数的增加而增大.加入质量分数为3％的混合粉末制备的原位Al2O3颗粒增强ADC12复合材料半固态组织细小、圆整、较均匀分布,硬度较基体的90 HV提高了25.6％.
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| 关 键 词： | 原位合成 Al2O3 高能超声 复合材料 Fe2B 半固态 |
Research on Preparation and Microstructure of In Situ Al2O3 Particles Reinforced ADC12 Composite |
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| HE Ru
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YAN Hong
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ZHONG Wei-min.Research on Preparation and Microstructure of In Situ Al2O3 Particles Reinforced ADC12 Composite[J].Foundry,2012,61(4):396-399. |
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| Authors: | HE Ru YAN Hong ZHONG Wei-min |
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| Affiliation: | 1.Department of Materials Processing Engineering,School of Mechanical and Electrical Engineering,Nanchang University,Nanchang 330031,Jiangxi,China; 2.Fuzhou Vocational & Technical College,Fuzhou 344000,Jiangxi,China) |
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| Abstract: | The precast block made from ball milling mixed powder of Al and B2O3 was crushed and then added into ADC12 aluminum melt.Al2O3 particles reinforced ADC12 composite was prepared by high intensity ultrasonic-melt direct reaction method,heated at 585 ℃,for 15 min.The distribution,morphology and composition of the second-phase were analyzed by XRD,SEM and EDS.The semi-solid microstructure of composites was analyzed by metallurgical microscope.The results show that the using of combining Al-B2O3 system can prepare in situ Al2O3 particle reinforced ADC12 composites.Impurity Fe is removed from melt by Fe2B.The semi-solid microstructure of composite becomes fine,uniform and round.The hardness increases with the increasing of the mixed powder.By adding 3wt.%mixed powder,the semi-solid microstructure of composites is fine,uniform and round.The hardness is 1.256 times as much as 90HV of matrix. |
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| Keywords: | in situ Al2O3 high intensity ultrasonic composite Fe2B semi-solid |
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