Influence of Ag addition on the microstructure and properties of copper-alumina composites prepared by internal oxidation
Influence of Ag addition on the microstructure and properties of copper-alumina composites prepared by internal oxidation
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Ag添加量对内氧化铜铝复合材料组织与性能的影响
DOI：
10.1016/j.jallcom.2017.06.176
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发表时间：
2017-10
影响因子：
6.2
通讯作者：
Yi DQ
中科院分区：
文献类型：
--
作者：
Zhou Xiyi;Yi Danqing;Hu Zhan;Huang Jing;Zhou Xiyi;Yi Danqing;Hu Zhan;Huang Jing;Zhou Xiyi;Nyborg Lars;Cao Yu;Yi DQ
摘要本文采用Cu-Al和Cu-Al-Ag片在950° C下内氧化2 h的方法制备了具有较高显微硬度和电导率的Cu-Al 2 O3复合材料。少量的Ag作为添加剂掺杂，Ag/Al的原子比范围为0至0.25。研究了Ag的加入对合金显微组织、导电性和显微硬度的影响。结果表明，内氧化Cu-Al合金中Al 2 O3的形貌和尺寸分布对Ag的加入非常敏感。随着Ag含量的增加，Al 2 O3析出相的尺寸由原来的约63 nm减小到约37 nm.此外，通过场发射扫描电子显微镜（FESEM）和高分辨透射电子显微镜（HRTEM）观察到Ag掺杂的Cu-Al 2 O3复合材料中存在大量尺寸相近的三角形Al 2 O3沉淀物。三角形Al 2 O3与Cu基体之间的取向关系为[112] Cu//[110] Al 2 O3，（11 1 <$）Cu//（002）Al 2 O3和（2 2 <$0）Cu//（2 2 <$0）Al 2 O3。增加Ag的量同时提高导电性和机械强度。当Ag/Al原子比为1：4时，内氧化Cu-Al 2 O3-Ag合金的电学性能和力学性能最佳，分别为85.9%IACS和162 HV。
Abstract In present study, Cu-Al 2 O 3 composites with both higher micro-hardness and electrical conductivity were fabricated by internal-oxidizing Cu-Al and Cu-Al-Ag sheets at 950° C for 2 h. A small amount of Ag was doped as additives with atomic ratio of Ag/Al ranging from 0 to 0.25. Effects of Ag addition on microstructures, electrical conductivity and micro-hardness were investigated. Results show that the morphology and size distribution of Al 2 O 3 in internal-oxidized Cu-Al alloys were highly sensitive to Ag addition. The size of Al 2 O 3 precipitates decreased from∼ 63 nm to∼ 37 nm when increasing Ag content. Moreover, a large number of triangular Al 2 O 3 precipitate with similar size was observed by field emission scanning electron microscope (FESEM) and high-resolution transmission electron microscopy (HRTEM) in Ag-doped Cu-Al 2 O 3 composites. The orientation relationship between triangular Al 2 O 3 and Cu matrix was [112] Cu//[110] Al2O3,(11 1¯) Cu//(002) Al2O3 and (2 2¯ 0) Cu//(2 2¯ 0) Al2O3. Increasing the amount of Ag enhances the electrical conductivity and mechanical strength simultaneously. The optimal electrical and mechanical properties which were 85.9% IACS and 162 HV respectively, were obtained when atomic ratio of Ag/Al was∼ 1: 4 in internal-oxidized Cu-Al 2 O 3-Ag alloy.
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影响因子：
3
作者：
D. W. Lee;B. K. Kim
通讯作者：
D. W. Lee;B. K. Kim
影响因子：
5.5
作者：
Lee, Jaekyoung;Jeon, Himchan;Kwak, Ja Hun
通讯作者：
Kwak, Ja Hun
DOI：
10.1016/j.msea.2013.07.074
发表时间：
2013-11
影响因子：
6.4
作者：
C. Krüger;A. Mortensen
通讯作者：
C. Krüger;A. Mortensen
通过稀土掺杂改变单分散双功能碱土氟化物纳米晶的尺寸和形状
影响因子：
15
作者：
Chen, Daqin;Yu, Yunlong;Wang, Yuansheng
通讯作者：
Wang, Yuansheng
DOI：
10.1107/s0567739469001549
发表时间：
1969-01-01
期刊：
ACTA CRYSTALLOGRAPHICA SECTION A-CRYSTAL PHYSICS DIFFRACTION THEORETICAL AND GENERAL CRYSTALLOGRAPHY
影响因子：
--
作者：
STRAUMANIS, ME;YU, LS
通讯作者：
YU, LS