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Si對原位自生Mg2Si/AM60復合材料組織及性能的影響
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國家自然科學基金(50465003，50765005)；江西省科技廳和江西省教育廳資助項目


Effects of Si on Microstructure and Properties of in Situ Synthesized Mg2Si/AM60 Composites
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    摘要:

    采用原位合成技術制備Mg2Si/AM60復合材料，研究不同Si含量對其組織及性能的影響。結果表明：鎂合金中加入結晶Si后，出現(xiàn)短棒狀及中國漢字狀的Mg2Si相；當Si含量較高時，中國漢字狀的Mg2Si相消失，變成不規(guī)則的塊狀。制備過程中對復合材料進行機械攪拌，Mg2Si相的分布較未攪拌更加均勻、彌散。復合材料的抗拉強度、硬度隨Si含量的增加呈上升趨勢，延伸率則下降。當Si量為1.0%(質量分數(shù), 下同)時，強度較基體提高12%，含量為5%時，硬度較基體提高48.6%

    Abstract:

    Mg2Si/AM60 composites were fabricated by in situ synthesis, and their microstructures and properties were investigated for the composites adding different Si contents. The results indicate that some fine Mg2Si particles of cosh shape and chinese script shape appeared in the microstructure by adding crystal Si, but were changed to irregular bulks when the content of Si is high. The composites with more homogeneous distribution of Mg2Si particles were produced by mechanical stirring. The ultimate tensile strength and hardness of composites were increased with the increase of Si, but the elongation was reduced. The ultimate tensile strength increased by 12 % for 1.0 % Si addition and the hardness increased by 48.6 % for 5 % Si addition

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胡 勇,閆 洪,陳國香,梅楹煜. Si對原位自生Mg2Si/AM60復合材料組織及性能的影響[J].稀有金屬材料與工程,2009,38(2):343~347.[Hu Yong, Yan Hong, Chen Guoxiang, Mei Yingyu. Effects of Si on Microstructure and Properties of in Situ Synthesized Mg2Si/AM60 Composites[J]. Rare Metal Materials and Engineering,2009,38(2):343~347.]
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  • 收稿日期:2008-01-25
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