Sage Journals: Discover world-class research

Abstract

In order to improve the in situ oxidation kinetic condition of Al in copper matrix, Cr, instead of Al was in situ oxidized to form Cu/Cr₂O₃ composites in the present investigation, Cu—Cr powders with different solubilities after mechanical activation were utilized to synthesize Cu/Cr₂O₃ composites, and their microstructure and stability were analyzed. The results show that although the Cu—Cr powders suffer from the same mechanical activation, Cr₂O₃ particles formed by the powders with different solubilities have great differences in size, amount, and distribution. In the range of experiments conducted, the Cu/Cr₂O₃ composite formed by Cu—Cr powders with 67% solution has large amounts of finer Cr₂O₃ particles uniformly distributed in the copper matrix and exhibited the best stability at elevated temperatures.

Keywords

Cu/Cr2O3 composite mechanical activation in situ oxidation solubility high-temperature stability.

Get full access to this article

View all access options for this article.

References

Rajkovic, V. , Bozic, D. and Jovanovica, M.T. (2008). Properties of Copper Matrix Reinforced with Various Sizes and Amounts of Al2O3 Particles, Journal of Materials Processing Technology, 200: 106-114.

Samal, P.K. ( 1984). Dispersion Strengthened Copper, Metal Powder Report, 9(10): 587-589.

Motta, M.S. , Jena, P.K. , Brocchi, E.A. and Solorzano, I.G. ( 2001). Characterization of Cu-Al2O3 Nano-scale Composites Synthesized by In-situ Reduction, Materials Science and Engineering C , 15: 175-177.

Jena, P.K. , Brocchi, E.A. and Motta, M.S. ( 2001). In-situ Formation of Cu-Al2O3 Nano-scale Composites by Chemical Routes and Studies on Their Microstructures, Materials Science and Engineering A, 313: 180-186.

Liang, S.H. , Fan, Z.K. and Fang, L. ( 2004). The Effect of Al Content on the Properties and Microstructure of Al2O3/Cu Composite Prepared by Internal Oxidation, Journal of Composite Materials, 38(17): 1495-1504.

Perez, J.F. and Morris, D.G. ( 1994). Copper-Al2O3 Composites Prepared by Reactive Spray Deposition , Scripta Metallurgica, 31(3): 231-235.

Song, K.X. , Liu, P. and Tian, B.H. ( 2005). Stabilization of Nano-Al2O3p/Cu Composite after High Temperature Annealing Treatment, Materials Science Forum , 475-479: 993-996.

Song, K.X. , Xing, J.D. , Dong, Q.M. , Liu, P. , Tian, B.H. and Cao, X.J. ( 2004). Internal Oxidation of Dilute Cu-Al Alloy Powers with Oxidant of Cu2O, Materials Science & Engineering A, 380: 117-122.

Shen, Y. , Cui, C. , Meng, F. and Wu, R. ( 1999). Fabrication of Cu-Al2O3 Composites with High Strength and Electric Conductivity, Acta Metallurgica Sinica, 35(8): 888-892.

10.

Liang, S. , Liang, F. and Fan, Z. ( 2004). Internal oxidation of Cr in Cu-Cr/Cu2O Composite Powder Prepared by Mechanical Activation, Materials Science and Engineering A, 374: 27-33.

11.

Arami, H. and Simchi, A. ( 2007). Reactive Milling Synthesis of Nanocrystalline Al-Cu/Al2O3 Nanocomposite, Materials Science and Engineering A, 464: 225-232.

12.

Feng, Z. , Xi, S. , Zhang, D. , Song, X.W. and Zhou, J.E. ( 2001). Characteristics of Al, Mg, Si and Cu Element Powders by Mechanical Alloying , The Chinese Journal of Nonferrous Metals, 11(4): 642-646.

13.

Pasterek, R.L. and Rapp, R.A. (1969). The Solubility and Diffusivity of Oxygen in Solid Copper from Electrochemical Measurements , Transactions of the Metallurgical Society AIME, 245: 1711-1720.

14.

Brandes, E.A. and Brook, G.B. ( 1992). Smithells Metals Reference Book, 7th edn, pp. 13-19, Reed Educational and Professional Publishing Ltd, Woburn, MA.

Preparation of Cu/Cr 2 O 3 Composites by Mechanical Activation and In Situ Oxidation

Abstract

Keywords

Get full access to this article

References