Microstructure and Microanalysis Studies of Copper-Nickel-Tin Alloys Obtained by Conventional Powder Metallurgy Processing

Abstract:

The aim of this article was to analyze the microstructural development in samples of Cu-Ni-Sn alloys (weight %) obtained by powder metallurgy (P/M). The powders were mixed for 1/2 hour. After this, they were pressed, in a cold uniaxial pressing (1000 kPa). In the next step the specimens were sintered at temperatures varying from 650 up to 780°C under vacuum. Secondly, the samples were homogenized at 500oC for several special times. The alloys were characterized by optical microscopy, electrical conductivity and Vickers hardness. X rays powder diffraction data were collected for the sintered samples in order to a structural and microstructural analysis. The comparative analysis is based on the sintered density, densification parameter, hardness, macrostructures and microstructures of the samples.

• Periodical: Materials Science Forum (Volumes 660-661)
• Pages: 29-34
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.660-661.29
• Online since: October 2010
• Authors: Waldemar Alfredo Monteiro, Juan Alfredo Guevara Carrió, Terezinha Jocelen Masson, C.D. Abreu, I.M. Marques, L.C.E. da Silva
• Keywords: Copper-Nickel-Tin Alloy, Electrical Properties, Mechanical Property, Microstructure, Powder Metallurgy (PM), Structural Characterisation

References

[1] J. Crane and J. Winter, Copper: Encyclopedia of Materials Science and Engineering, vol. 2, Ed. MB Bewer, Pergamon Press and the MIT Press (1986), p.848 – 855.

[2] P. W. Taubenblat: Encyclopedia of Materials Science and Engineering, vol. 2, Ed. MB Bewer, Pergamon Press and the MIT Press (1986), pp.863-866.

[3] ASM Specialty Handbook: Copper and Copper Alloys, Metal, chapter 1, section 1, ASM International, (2001).

[4] C. R. Brooks: Heat Treatment, Structure and Properties of Nonferrous Alloys, ed. ASM, Metals Park, 1988, chapter 8.

[5] A. Butts: Copper, the Science and Technology of the Metal, its Alloys and Compounds, ed. Reinhold Publishing Corporation, New York, 1954, 3th printing (1960).

[6] G. Gosh, J. Kiyake and M. E. Fine: JOM (1997), p.56.

[7] A. Rotem, D. Shechtman, and A. Rosen: Metall. Trans. A Vol. 19A (1988), p.2279.

[8] D. Steiner, R. Beddoe, V. Gerold, G. Kostorz and R. Schmelczer: Scripta Metall. Vol. 17 (1983), p.733.

DOI: 10.1016/0036-9748(83)90483-0

[9] A. Guha: Development of a high-strength, high-conductivity Cu-Ni-Be Alloy, high conductivity Copper and Aluminum Alloys, eds. E. Ling and P. Taubenblat W., TMS – AIME Publ. (1984), pp.133-145.

[10] Y. Sakai, K. Inoue, and H. Maeda: Acta Metall. Mater. Vol. 43 (1995), p.1517.

[11] W. A. Monteiro: in Proceedings of IX CBECIMAT, Águas de São Pedro /SP, (1990), p.546.

[12] W. A. Monteiro, M. A. G. Silveira e O. Júlio Jr: Metalurgia & Materiais Vol. 51 (1995), p.440.

[13] W. A. Monteiro, F. Cosandey and P. Bandaru: in Proceedings of THERMEC'97, Wollongong, Australia, July (1997).

[14] W. A. Stadtler Production of Metallurgy Parts ASTM, Powder Metallurgy, Ohio (1989), p.449.

[15] M. Ghadiri, F.A. Farhadpour, R. Clift and J. P. K. Seville: Particle characterization size and morphology, The Institute of Metals Series on Powder Metallurgy - An Overview. London, (1991), p.56.

[16] Powder metallurgy - An overview. 1. Ed. The Institute of Metals Series on Powder Metallurgy, London, Great Britain, (1991).

[17] W. A. Kaysser: Solid State Sintering. The Institute of Metals Series on Powder Metallurgy - an overview London (1991), p.45.

[18] Thümmler F. and R. Oberacker: Introduction to Powder Metallurgy, The Institute of Materials, (1993).

[19] J. A. G. Carrió, W. A. Monteiro, V. A. Rodrigues, M. C. Terence, T. J. Masson, and L. F. Miranda: European Powder Diffraction Conference – EPDIC 11, 19-22 September, Warsaw, Poland (2008).