热挤压对内氧化法制备Cu-Al<sub>2</sub>O<sub>3</sub>组织性能的影响

田保红; 夏承东; 刘勇; 任凤章; 贾淑果; 刘平

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热挤压对内氧化法制备Cu-Al₂O₃组织性能的影响
Effects of Hot Extrusion on Microstructure and Properties of Cu-Al₂O₃ Composites Prepared by Simplified Internal Oxidation
2008年第3期页码：199-201
纸质出版日期： 2008 ，
DOI：

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[1]田保红,夏承东,刘勇,任凤章,贾淑果,刘平.热挤压对内氧化法制备Cu-Al_2O_3组织性能的影响[J].特种铸造及有色合金,2008(03):199-201+161.

Tian Baohong, Xia Chengdong, Liu Yong, et al. Effects of Hot Extrusion on Microstructure and Properties of Cu-Al₂O₃ Composites Prepared by Simplified Internal Oxidation[J]. Special Casting & Nonferrous Alloys, 2008,(3):199-201.
[1]田保红,夏承东,刘勇,任凤章,贾淑果,刘平.热挤压对内氧化法制备Cu-Al_2O_3组织性能的影响[J].特种铸造及有色合金,2008(03):199-201+161. DOI：

Tian Baohong, Xia Chengdong, Liu Yong, et al. Effects of Hot Extrusion on Microstructure and Properties of Cu-Al₂O₃ Composites Prepared by Simplified Internal Oxidation[J]. Special Casting & Nonferrous Alloys, 2008,(3):199-201. DOI：

摘要

采用一种新型简化内氧化工艺结合热挤压工艺

制备了Cu-Al2O3复合材料。对热挤压后复合材料的微观组织和硬度、抗拉强度和电导率进行了研究。结果表明

热挤压明显细化了复合材料的组织

提高了组织均匀性

减少了孔隙等粉末烧结缺陷

得到了较为致密的Cu-Al2O3复合材料;密度达到8.82g.cm-3;热挤压后其硬度、抗拉强度和电导率显著提高

分别达到HV111、242MPa、40.6MS/m。拉伸断口分析表明

烧结态和挤压态断口均为韧窝聚集型断裂

热挤压改善了烧结态的韧性。

Abstract

The Cu-Al2O3 composites were prepared by a simplified internal oxidation method combining with hot extrusion.Effects of hot extrusion on microstructure

hardness

tensile strength and electric conductivity of the composites have been examined.The results show that the microstructure of the hot extruded composites can be refined with more homogeneous.The pore defects in the composites are decreased

which leads to the densification of the composites with density of 8.82 g/cm3.The hardness

tensile strength and electric conductivity of the hot extruded composites reach up to 111HV

242 MPa

41.76 S/m

respectively.The fracture morphology observation reveals that the fractures of both sintered and hot extruded composites are characterized by dimple aggregation crack

in which the hot extrusion can improve the ductility of sintered composites.