中低体积分数SiC<sub>p</sub>增强铝基复合材料的性能研究

温冬宝; 朱德智; 詹泉泉; 陈龙

doi:10.15980/j.tzzz.2020.06.021

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中低体积分数SiC_p增强铝基复合材料的性能研究
Properties of Medium and Low Volume Fraction SiC Reinforced Aluminum Matrix Composites
2020年40卷第6期页码：667-672
纸质出版日期： 2020 ，
DOI： 10.15980/j.tzzz.2020.06.021

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[1]温冬宝,朱德智,詹泉泉,陈龙.中低体积分数SiC_p增强铝基复合材料的性能研究[J].特种铸造及有色合金,2020,40(06):667-672.

Wen Dongbao, Zhu Dezhi, Zhan Quanquan, et al. Properties of Medium and Low Volume Fraction SiC Reinforced Aluminum Matrix Composites[J]. Special Casting & Nonferrous Alloys, 2020,40(6):667-672.
[1]温冬宝,朱德智,詹泉泉,陈龙.中低体积分数SiC_p增强铝基复合材料的性能研究[J].特种铸造及有色合金,2020,40(06):667-672. DOI： 10.15980/j.tzzz.2020.06.021.

Wen Dongbao, Zhu Dezhi, Zhan Quanquan, et al. Properties of Medium and Low Volume Fraction SiC Reinforced Aluminum Matrix Composites[J]. Special Casting & Nonferrous Alloys, 2020,40(6):667-672. DOI： 10.15980/j.tzzz.2020.06.021.

摘要

采用压力浸渗法制备了SiC的体积分数分别为25%、30%、35%、40%、45%、50%的SiC

/2024和SiC

/6061铝基复合材料

并研究了SiC

体积分数对复合材料的组织和性能的影响

以及复合材料在热处理状态的力学性能。结果表明

随着SiC

体积分数增加

SiC

/2024和SiC

/6061复合材料的硬度、抗拉强度和抗压强度均明显增加

伸长率明显降低

材料断裂方式为脆性断裂。其中当SiC

体积分数为50%时

SiC

/2024和SiC

/6061复合材料的硬度（HB）分别达到243.34和154.97

抗压强度分别达到840.63和519.83MPa

抗拉强度分别达到340.2和300.5MPa。经过固溶时效处理后

复合材料的强度、硬度均提高

伸长率均降低

其中SiC

体积分数较高的复合材料经热处理后性能提升更明显

SiC

/6061复合材料的性能提升比SiC

/2024更明显。

Abstract

SiC

/2024 and SiC

/6061 composites were prepared by pressure infiltration method with volume fraction of SiC of 25%

30%

35%

40%

45%and 50%

respectively.The effects of the volume fraction of SiC particles on the microstructure and properties of the composites prepared were investigated by SEM

EDS and tensile testing

and the effects of heat treatment on the mechanical properties of the composites were analyzed.The experimental results show that the hardness

tensile strength and compressive strength of SiC

/2024 and SiC

/6061 composites are increased obviously with the increase of SiC volume fraction

while the elongation is obviously declined.The fracture mode of the composites is characterized by brittle fracture.With the volume fraction of SiC of 50%

the hardness

compressive strengths and tensile strengths of SiC

/2024 and SiC

/6061 composites reach up to HB243.34 and HB154.97

840.63 MPa and 519.83 MPa

340.2 MPa and 300.5 MPa

respectively.After solid solution and aging treatment

the strength and hardness of the two kinds of composite are increased

while the elongation is decreased.The properties of the composites with higher volume fraction of SiC are improved greatly after heat treatment

and the improvement of properties of SiC

/6061 composites is more obvious than that of SiC

/2024 composites.