Microstructure and properties of Cu–Mg alloy treated by internal oxidation

ABSTRACT A Cu–0.24Mg alloy bar was treated by internal oxidation using Cu2O as an oxidiser at 1123–1273 K for 10 h. The thermodynamic diagram for oxidation of a Cu–Mg alloy was confirmed by the critical oxygen pressure. The results show that the thickness of the MgO/Cu layer and the electrical conductivity of the Cu–0.24Mg alloy increase with increasing internal oxidation temperature, whereas the average hardness of the MgO/Cu layer initially increases and subsequently decreases. Examination of the microstructure of the MgO/Cu layer revealed that Mg precipitation in the form of MgO particles and their uniform dispersion in the Cu matrix were the primary reasons for increases in the comprehensive properties of the Cu–Mg alloy treated by internal oxidation.

[1]  X. Wang,et al.  Effect of Al2O3 Particle Size on Electrical Wear Performance of Al2O3/Cu Composites , 2016 .

[2]  F. Ren,et al.  Preparation of Cu–Al2O3 bulk nano-composites by combining Cu–Al alloy sheets internal oxidation with hot extrusion , 2015 .

[3]  Kei Watanabe,et al.  Stability of {111}Pd/{0002}ZnO polar interface formed by internal oxidation of Pd-Zn alloys. , 2014, Microscopy.

[4]  Wenshu Yang,et al.  Interfacial microstructure and its effect on thermal conductivity of SiCp/Cu composites , 2014 .

[5]  Hongbo Zhang,et al.  Effect of heat treatment temperature on sliding wear behaviour of C/C-Cu composites under electric current , 2014 .

[6]  X. Wang,et al.  Effect of the Thermal Expansion Characteristics of Reinforcements on the Electrical Wear Performance of Copper Matrix Composite , 2014 .

[7]  Xinqing Guo,et al.  Relationship between interfacial stress and thermal expansion coefficient of copper–matrix composites with different reinforced phases , 2014 .

[8]  Z. Zhang,et al.  Stability of interfaces in a multilayered Ag–Cu composite during cold rolling , 2013 .

[9]  S. C. Vettivel,et al.  Thermal, electrical and wear behavior of sintered Cu–W nanocomposite , 2013 .

[10]  C. Jia,et al.  Improvement of interface and mechanical properties in carbon nanotube reinforced Cu–Cr matrix composites , 2013 .

[11]  Yi Feng,et al.  Electrical sliding friction and wear properties of Cu–MoS2–graphite–WS2 nanotubes composites in air and vacuum conditions , 2013 .

[12]  K. Song,et al.  Thermal expansion behavior of MgO/Cu composite with lower MgO volume fraction , 2012 .

[13]  A. Moghanian,et al.  Production and properties of Cu/Cr2O3 nano-composites , 2012 .

[14]  王文魁,et al.  Tribological properties of Cu-La2O3 composite under different electrical currents , 2011 .

[15]  S. Hannula,et al.  The Microstructural Effects on the Mechanical and Thermal Properties of Pulsed Electric Current Sintered Cu-Al2O3 Composites , 2011 .

[16]  Gao Jianxin,et al.  Morphology and Frictional Characteristics Under Electrical Currents of Al2O3/Cu Composites Prepared by Internal Oxidation , 2008 .

[17]  S. Tjong,et al.  Low-cycle fatigue behavior of in situ TiB2/Cu composite prepared by reactive hot pressing , 2006 .

[18]  Ping Liu,et al.  Optimization of the processing parameters during internal oxidation of Cu–Al alloy powders using an artificial neural network , 2005 .

[19]  Ping Liu,et al.  Stabilization of Nano-Al2O3p/Cu Composite after High Temperature Annealing Treatment , 2005 .

[20]  Ping Liu,et al.  Internal oxidation of dilute Cu–Al alloy powers with oxidant of Cu2O , 2004 .

[21]  L. Fang,et al.  Internal oxidation of Cr in Cu–Cr/Cu2O composite powder prepared by mechanical activation , 2004 .

[22]  J. D. De Hosson,et al.  Determination of near coincident site lattice orientations in MgO/Cu composite , 2002 .

[23]  I. Bertóti,et al.  Cu–MgO Samples Prepared by Mechanochemistry for Catalytic Application , 2002 .

[24]  L. Froyen,et al.  Microstructure and interface characteristics of B4C, SiC and Al2O3 reinforced Al matrix composites: a comparative study , 2001 .

[25]  Lin H. Yang,et al.  Atomic Scale Observations of Metal-Induced Gap States at \{222\} MgO/Cu Interfaces , 1998 .

[26]  J. Groza,et al.  Principles of particle selection for dispersion-strengthened copper , 1993 .

[27]  J. Groza.  Heat-resistant dispersion-strengthened copper alloys , 1992 .

[28]  F. Pettit,et al.  Introduction to the high-temperature oxidation of metals , 2006 .

[29]  M. V. Speight,et al.  Growth kinetics of grain-boundary precipitates , 1968 .