The enhanced range of temperature for coefficient of low thermal expansion, electrical and thermal conductivities of Cu substituted Fe-Ni invar alloys

Six alloys of Fe65Ni35−xCux (x = 0, 0.2, 0.6, 1, 1.4, 1.8 at.%) have been prepared by conventional arc-melting technique and characterized by utilizing high temperature x-ray diffraction (HTXRD) technique at a range from room temperature to 773 K for determination of phase, lattice parameter (a), co...

Full description

Saved in:
Bibliographic Details
Published in:Physica scripta 2016-03, Vol.91 (3), p.35701-35707
Main Authors: Khan, S A, Ziya, A B, Ibrahim, A, Atiq, S, Ahmad, N, Bashir, F
Format: Article
Language:English
Subjects:
Alloys
Debye temperature
Ferrous alloys
Heat transfer
invar alloys
lattice constant
Low expansion alloys
Thermal conductivity
Thermal expansion
Vibration
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Six alloys of Fe65Ni35−xCux (x = 0, 0.2, 0.6, 1, 1.4, 1.8 at.%) have been prepared by conventional arc-melting technique and characterized by utilizing high temperature x-ray diffraction (HTXRD) technique at a range from room temperature to 773 K for determination of phase, lattice parameter (a), coefficient of thermal expansion ( (T)), mean square amplitude of vibration ( characteristic Debye temperature (ΘD), electrical resistivity ( ) and thermal conductivity (κ). The studies showed that these alloys form face centered cubic structure (fcc) throughout the investigated temperature range. The values of (T) were found to be comparable to those for conventional Fe-Ni invar alloys but have increased temperature span to a significant extent. The mean square amplitude of vibration ( and Debye temperature were found to remain almost unchanged in the invar temperature range, whereas the electrical and thermal conductivity were found to improve.
ISSN:0031-8949
1402-4896
DOI:10.1088/0031-8949/91/3/035701