Properties of Double Scale Al<sub>2</sub>O<sub>3</sub> Particles Reinforced Aluminum Matrix Composites

Gao Hongxia; Yang Dong; Wang Xiuhong; Han Huali

doi:10.15980/j.tzzz.2014.04.003

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Properties of Double Scale Al₂O₃ Particles Reinforced Aluminum Matrix Composites
Vol. 34, Issue 4, Pages: 423-426(2014)
Published： 2014 ，
DOI： 10.15980/j.tzzz.2014.04.003

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[1]高红霞,杨东,王秀红,韩华丽.双尺度Al_2O)3颗粒增强铝基复合材料的组织和性能[J].特种铸造及有色合金,2014,34(04):423-426.

Gao Hongxia, Yang Dong, Wang Xiuhong, et al. Properties of Double Scale Al₂O₃ Particles Reinforced Aluminum Matrix Composites. [J]. Special Casting & Nonferrous Alloys 34(4):423-426(2014)
[1]高红霞,杨东,王秀红,韩华丽.双尺度Al_2O)3颗粒增强铝基复合材料的组织和性能[J].特种铸造及有色合金,2014,34(04):423-426. DOI： 10.15980/j.tzzz.2014.04.003.

Gao Hongxia, Yang Dong, Wang Xiuhong, et al. Properties of Double Scale Al₂O₃ Particles Reinforced Aluminum Matrix Composites. [J]. Special Casting & Nonferrous Alloys 34(4):423-426(2014) DOI： 10.15980/j.tzzz.2014.04.003.

摘要

通过粉末冶金真空热压烧结法制备了双尺度（nm、μm）混杂Al2O3颗粒增强铝基复合材料

并对复合材料的组织、密度、硬度及耐磨性进行了研究。结果表明

双尺度复合材料中增强颗粒在基体中分布均匀

没有明显的团聚现象

微米颗粒含量超过20%时

复合材料的空隙增多;4%的30nm颗粒+15%的75μm颗粒的双尺度复合材料的性能最好

其硬度比基体Al-Si合金提高70%

耐磨性比基体铝硅合金提高7.22倍;双尺度混杂颗粒复合材料的耐磨性高于单一纳米或微米颗粒复合材料

其磨损机制主要为粘着磨损、犁削和磨粒磨损。

Abstract

Double scale（nano

micro）Al2O3particle reinforced aluminum matrix composites were prepared by powder metallurgy combining with vacuum hot pressing sintering method

and the microstructure

density

hardness and wear resistance of the composites prepared were analyzed.The results show that two-scale composite reinforcement is uniformly distributed in the matrix with the absence of agglomeration.With micron particle content more than 20%

the holes in the composites prepared are increased.Two-scale composites with particles in size of 4%30nm and 15%75μm exhibit desirable performance

and its hardness is increased by 70%

and wear resistance is increased by 7.31%

compared with those of Al-Si matrix.Wear resistance of two-scale hybrid particulate composites is higher than a single nanometer or micrometer particulate reinforced composites

and the main wear mechanism is characterized by adhesive wear

plough wear and abrasive particle wear.