J. Phys. IV France 112 (2003) 579
Preparation of Cu-Al-Nb shape memory alloys by high energy ball milling and powder metallurgyM.C.A. da Silva1, C.J. Araujol2, R.E. Coelho1, T.A.A. Melo1, R.M. Gomes1 and S.J.G. de Lima1
1 Universidade Federal da Paraiba, Centro de Tecnologia, Departamento de Tecnologia Mecânica, Laboratorio de Solidificaçao Rapida, Joao Pessoa-PB, CEP 58059-900, Brazil
2 Universidade Federal da Paraiba, Departamento de Engenharia Mecânica, Campus Il, Caixa Postal 10069, Campina Grande-PB, CEP 58109-970, Brazil
This work focuses on the necessary conditions for obtaining Cu-Al-Nb based shape memory alloys by means of mechanical alloying powder metallurgy. The Cu, AI, and Nb elemental powders were pre-alloyed using a pulverisette high energy ball milling for Cu-13. 0wt%AI-2.0wt%Nb alloy. The microstructural evolution during the milling was investigated by using X-ray diffraction. It was observed that the Cu(AI) solid solution can be obtained with short milling times. A relative sintered density on the order of 93% on the theoretical value was achieved. Additionally, after quenching the microstructure of the sintered compacts was formed by the 18R type martensite and Cu(AI) solid solution.
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