High-Energy Ball Milling of Ni-Ti and Ni-Ti-Nb Powders


Article Preview

This work reports on the preparation of Ni-50Ti and Ni-40Ti-10Nb and Ni-30Ti- 20Nb (at.%) powders by high-energy ball milling and subsequent heat treatment. The milling process was carried out at room temperature in a planetary ball mill under Ar atmosphere. The as-milled powders were than heat-treated at 900oC for 1h under Ar atmosphere. X-ray diffraction (XRD), scanning electron microscopy (SEM), and microanalysis via energy dispersive spectroscopy (EDS) were used to characterize the milled and heat-treated powders. A metastable phase was initially formed in Ni-50Ti and Ni-40Ti-10Nb powders milled for 1h. Following the ball milling, the B2-NiTi compound was formed in these powder mixtures. The disordering of the B2-NiTi compound occurred owing the internal lattice strain after milling for 30h. Two phases were identified in Ni-50Ti and Ni-40Ti-10Nb powders milled for 60h: the metastable phase previously reported, and an amorphous phase. In Ni-30Ti-20Nb powders, it was noted the presence of an amorphous halo only. A structural relaxation of the B2-NiTi phase occurred in heat-treated Ni-50Ti, Ni-40Ti-10Nb, and Ni-30Ti-20Nb powders. A small amount of Ni3Ti and NiTi2 was also formed after heat treatment at 900oC for 1h, and an iron contamination lower than 2at.% was found.



Materials Science Forum (Volumes 530-531)

Edited by:

Lucio Salgado and Francisco Ambrozio Filho




C.B. Martins et al., "High-Energy Ball Milling of Ni-Ti and Ni-Ti-Nb Powders", Materials Science Forum, Vols. 530-531, pp. 211-216, 2006

Online since:

November 2006




[1] M.E. Schlesinger, Journal of Phase Equilibria, 15 (1994), p.90.

[2] E.C.T. Ramos, C.A. Nunes, G.C. Coelho, A.S. Ramos, J. Metastable and Nanocrystalline Materials, 20-21 (2004), p.201.

[3] E.C.T. Ramos, C.A. Nunes, G.C. Coelho, 57 o Intern. ABM Congress (2002), p.359.

[4] N. Bensebaa, S. Alleg, J.M. Grenèche, J. Alloys and Compounds, 393 (2005), p.194.

[5] C.J. Lu and Z.Q. Li, Journal of Alloys and Compounds, 395 (2005), p.88.

[6] O. Isnard, V. Pop, I. Chicinas, J. Magnetism and Magnetic Mat, 290-291 (2005), p.1535.

[7] Y.W. Gu, C.W. Goh, L.S. Goi, C.S. Lim, A.E.W. Jarfors, B.Y. Tay, M.S. Yong, Mat. Sci. Eng. A, 392 (2005), p.222.

[8] G. Silva, E.C.T. Ramos, D.M. Silvério, A.S. Ramos, K.R. Cardoso, C.A. Nunes, J. Metastable and Nanocrystalline Mat, 20-21 (2004), p.145.

[9] B.B. Fernandes, E.C.T. Ramos, P.A. Suzuki, A.S. Ramos, J. Met. and Nan. Mat (in press).

[10] B.B. Fernandes, C.A. Nunes, G. Rodrigues, E.C.T. Ramos, H.R.Z. Sandim, A.S. Ramos, In: 16th International Plansee Seminar, 1 (2005), p.593.

[11] C. Suryanarayana, Progress in Materials Science. 46 (2001), p.1.

[12] JCPDS: Selected Powder Diffraction Data for Metals and Alloys, Swarthmore, (1979).

[13] G. Nolze, W. Kraus, PowderCell 2. 0 for Windows, Powder Diffr. 13 (1998), p.256.

Fetching data from Crossref.
This may take some time to load.