SUCCESSFUL INSTALLATION OF ARC MELTER AT PINSTECH FOR THE SYNTHESIS OF BULK AMORPHOUS MATERIALS

Authors

  • M. Iqbal Microsrtuctural Studies Group, Physics Division, Directorate of Science, PINSTECH, P.O. Nilore, Islamabad, Pakistan
  • B. Ahmad Microsrtuctural Studies Group, Physics Division, Directorate of Science, PINSTECH, P.O. Nilore, Islamabad, Pakistan

Abstract

In this paper the results on production of [Zr0.65Cu0.18Ni0.09Al0.08]98Nb2 bulk amorphous alloy synthesized by the Arc Melter WK-II are presented. The machine is installed at MSG-PD-PINSTECH for the synthesis of bulk metallic glasses (BMGs). Actually this machine is the combination of arc and induction melting furnaces with Cu mold casting facility. With the installation of this machine, it is possible to produce various types of materials locally such as bulk amorphous materials and polycrystalline materials. Both rods and sheets can be produced. The specifications of machine and procedures of materials synthesis are described. Thermal properties, crystallization behaviour and activation energy of [Zr0.65Cu0.18Ni0.09Al0.08]98Nb2 BMG have been reported. Characterization of materials was done by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) techniques. The alloy shows wide supercooled liquid region of more than 120 K. DSC results show double stage crystallization. The activation energy for first and second stage crystallization was calculated to be 198.6 and 156.7 kJ/mol. The NiZr2 (metastable phase) and CuZr2 (stable phase) were found in the annealed samples. XRD, DSC and EDS results are in good agreement.

References

W. Klement, R.H. Willens and P. Duwez,

Nature 187 (1960) 869.

A. Inoue, Acta Mater. 48 (2000) 279.

M. Telford, Mater. Today. 7 (2004) 36.

M. Iqbal and J.I. Akhter, Key Eng. Mater. 442

(2010) 41.

M. Iqbal, Ph. D. Dissertation, Institute of

Metal Research, Chinese Academy of

Sciences, Shenyang, China, May (2008).

A.L. Greer, Nature 366 (1993) 303.

W. Chen, Y. Wang, J. Qiang and C. Dong,

Acta Mater. 51 (2003) 1899.

C. Dong, Y.M. Wang, J.B. Qiang, D.H. Wang,

W.R. Chen and C.H. Shek, Mater. Trans. 45

(2004) 1177.

W. H. Wang, Prog. Mater. Sci. 52 (2007)

M. Iqbal, W.S. Sun, H.F. Zhang, J.I. Akhter

and Z.Q. Hu, Mater. Sci. Eng. A 447 (2007)

Z.P. Lu and C.T. Liu, J. Mater. Sci. 39 (2004)

A. Takeuchi and A. Inoue, Mater. Trans. 46

(2005) 2817.

O.N. Senkov and D.B. Miracle, Mater. Res.

Bull. 36 (2001) 2183.

Z.P. Lu, H. Bei and C.T. Liu, Intermetallics 15

(2007) 618.

Q.J. Chen, J. Shen, D.L. Zhang, H.B. Fan, J.

F. Sun and D.G. McCartney, Mater. Sci. Eng.

A433 (2006) 155.

Z.Z. Yuan, S.L. Bao, Y. Lu, D. P. Zhang and

L. Yao, J. Alloy. Compd. 459 (2008) 251.

Z.L. Long, G. Xie, H. Wei, J. Peng, P. Zhang

and A. Inoue, Mater. Sci. Eng. A 509 (2009)

A. Hruby, Czech. J. Phys. B 22 (1972) 1187.

M. Saad and M. Poulain, Mater. Sci. Forum

(1987)11.

M.L.F. Nascimento, L.A. Souza, E.B. Ferreira

and E.D. Zanotto, J. Non-Cryst. Solids 351

(2005) 3296.

Y. Li, J. Mater. Sci. Technol. 15 (1999) 97.

H.E. Kissinger, Ana. Chem. 29 (1957) 1702.

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Published

06-12-2010

How to Cite

[1]
M. Iqbal and B. Ahmad, “SUCCESSFUL INSTALLATION OF ARC MELTER AT PINSTECH FOR THE SYNTHESIS OF BULK AMORPHOUS MATERIALS”, The Nucleus, vol. 48, no. 1, pp. 11–16, Dec. 2010.

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