J. Mater. Sci. Technol. ›› 2009, Vol. 25 ›› Issue (02): 208-210.

• Articles • 上一篇    下一篇

A Study of Structure and Thermal Parameters of Ni20Pd80 Alloy

amer ziya   

  1. Bahauddin Zakariya University ;Multan
  • 收稿日期:2007-11-17 修回日期:2008-07-24 出版日期:2009-03-28 发布日期:2009-10-10
  • 通讯作者: amer ziya

Structure and Thermal Parameters of Ni20Pd80 Alloy

S. Ahmad1), A.B. Ziya1)†, A. Aziz1) and Z.I. Zafar2)   

  1. 1) Department of Physics, Bahauddin Zakariya University, Multan-60800, Pakistan
    2) Department of Chemistry, Bahauddin Zakariya University, Multan-60800, Pakistan
  • Received:2007-11-17 Revised:2008-07-24 Online:2009-03-28 Published:2009-10-10
  • Contact: amer ziya

Abstract:

The structure and thermal parameters of Ni20Pd80 alloy were studied by X-ray diffraction(XRD). The diffraction experiments performed in the temperature range of 308-1100 K revealed that the alloy formed a face centered cubic (fcc) A1-type structure. The temperature dependence of the lattice parameters was investigated by using the Bragg line displacement method showing that the lattice parameter increases with the increase of temperature. The mean linear thermal expansion (MLTE(%)), coe±cient of thermal expansion (CTE, α), the characteristic Debye temperature (θD) and mean square amplitudes of vibration were determined from XRD data. The value of Debye temperature was found to be 253 K. It was found that temperature factor was independent of the static displacements.

Key words: Alloys, Structure, Thermal parameters, X-ray diffraction (XRD)