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Thermodynamic consideration and experimental study on the preparation of heat-treated hollow nickel fibres

  • Fan Li and Du Sichen
Published/Copyright: June 11, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 99 Issue 9

Abstract

In the present work, heat-treated hollow nickel fibres were prepared by thermal decomposition from nickel viscose composite. The thermodynamic properties of viscose fibre, namely standard enthalpy of formation, heat capacity, absolute entropy, and standard Gibbs free energy of formation were estimated by bond enthalpy. Thermodynamic analysis showed that viscose fibres could decompose at any reachable temperature, when the kinetic conditions were favourable. The results of thermogravimetric analysis experiments indicated that viscose filling could be removed by heat treatment in air. The thermogravimetric analysis results along with X-ray diffraction, scanning electron microscopy and X-ray energy dispersive spectrum analysis showed that hollow nickel fibre could be prepared by direct thermal decomposition in air flow at low temperatures, e. g. 573 K. Decomposition of the viscose filling could also be carried out at higher temperatures. However, serious oxidation of nickel would also take place during the decomposition. To remove nickel oxide, reduction by hydrogen gas could be applied.

Keywords: Hollow nickel fibre; Thermal decomposition; Bond enthalpy method
* Correspondence address, Prof. Du Sichen, Department of Material Science and Engineering, Royal Institute of Technology, Brinellvägen 23, SE-10044, Stockholm, Sweden, Tel.: +46 8 790 8359, Fax: +46 8 790 0939, E-mail:

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Received: 2007-8-1
Accepted: 2008-5-15
Published Online: 2013-06-11
Published in Print: 2008-09-01

© 2008, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.101726
Keywords for this article
Hollow nickel fibre; Thermal decomposition; Bond enthalpy method

Articles in the same Issue

  1. Contents
  2. Contents
  3. Basic
  4. Critical temperature for massive transformation in ultra-low-carbon Fe–C alloys
  5. Are data correctly fitted by the sin2 ψ and similar methods?
  6. Liquidus surface projection of the Fe–Co–C ternary system in the iron-rich corner
  7. Prediction of thermodynamic activities in binary iron-based alloys using two-point Padé approximants
  8. Study of fatigue dislocation structures in [233] coplanar double-slip-oriented copper single crystals using SEM electronic channelling contrast
  9. Microstructures at high temperature of Fe-30 wt.% Cr-xC Alloys with x varying from 0 to 2 wt.%
  10. The effect of cooling rate on the microstructure and mechanical properties of Mg–Zn–Gd-based alloys
  11. The effect of thermal exposure on the microstructure and hardness of as-cast Mg–Zn–Al alloys with Sn addition
  12. Applied
  13. Deformation and fracture of Ti-base nanostructured composite
  14. Microstructure and some properties of FeCr25Co15 alloy subjected to plastic deformation by complex load
  15. Determination of the concentration dependent diffusion coefficient of nitrogen in expanded austenite
  16. Suitability of maraging steel weld cladding for repair of die casting tooling
  17. Catalytic performance of Fe-, Pd-, and Pd–Fe- mordenites in simulated hydrocarbon-selective catalytic reduction of N2O by methane in a model flue-gas from nitric acid plants
  18. Thermodynamic consideration and experimental study on the preparation of heat-treated hollow nickel fibres
  19. A model for the intrinsic kinetic parameters of the direct reduction of MoS2 with hydrogen
  20. Notification
  21. DGM News
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