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稀土La對Al2O3/Cu復合材料組織與性能的影響
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裝備再制造技術國防科技重點實驗室基金 (9140C850201110C85)


Effect of Rare Earth La on Microstructures and Properties of Al2O3/Cu Composites
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    摘要:

    利用機械合金化法結(jié)合放電等離子燒結(jié)制備Al2O3/Cu銅基復合材料，采用XRD、SEM、硬度、抗拉強度和電導率等測試研究La含量對Al2O3/Cu復合粉末和燒結(jié)材料組織及性能的影響。結(jié)果表明：添加0.05%的稀土La有利于機械合金化過程中Cu晶粒的細化和Al2O3顆粒的彌散分布，從而提高燒結(jié)材料的顯微硬度和抗拉強度。燒結(jié)材料的導電率隨著La含量的增加先升后降，當La的質(zhì)量分數(shù)為0.10%時，Al2O3/Cu復合材料的導電率提高11.3%IACS

    Abstract:

    Dispersion strengthened copper-base composites Al2O3/Cu were fabricated by mechanical alloying and spark-plasma sintering. The effect of the content of rare earth La on the microstructure and properties of Al2O3/Cu composite powder and the sintered materials were studied. The results show that 0.05%La addition to the Al2O3/Cu composite powder accelerates grain refinement and alumina particle dispersion in the mechanical alloying process, so as to improve the microhardness and tensile strength of the composites. The conductivity of the composite increases and then decreases with the increase of the content of La, and the conductivity increases by 11.3%IACS when the La content is 0.10%.

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李 斌,劉貴民,丁華東,鄭曉輝,閆 濤.稀土La對Al2O3/Cu復合材料組織與性能的影響[J].稀有金屬材料與工程,2014,43(5):1272~1274.[Li Bin, Liu Guimin, Ding Huadong, Zheng Xiaohui, Yan Tao. Effect of Rare Earth La on Microstructures and Properties of Al2O3/Cu Composites[J]. Rare Metal Materials and Engineering,2014,43(5):1272~1274.]
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  • 收稿日期:2013-05-14
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  • 在線發(fā)布日期: 2014-10-13
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