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Title: A chemical approach toward low temperature alloying of immiscible iron and molybdenum metals

Graphical abstract: - Highlights: • Low temperature pyrolysis of [Fe(bipy){sub 3}]Cl{sub 2} and [Mo(bipy)Cl{sub 4}] homogeneous powder. • Easy low temperature alloying of immiscible metals like Fe and Mo. • Uniform sized Fe–Mo nanoalloy with particle size of 48–68 nm. • Characterization by EDXRF, AFM, XRPD, magnetometery, {sup 57}Fe Mössbauer and impedance. • Alloy behaves as almost superparamagnetic obeying simple –R(CPE)– circuit. - Abstract: The present research is based on a low temperature operated feasible method for the synthesis of immiscible iron and molybdenum metals’ nanoalloy for technological applications. The nanoalloy has been synthesized by pyrolysis of homogeneous powder precipitated, from a common solvent, of the two complexes, trisbipyridineiron(II)chloride, [Fe(bipy){sub 3}]Cl{sub 2}, and bipyridinemolybedenum(IV) chloride, [Mo(bipy)Cl{sub 4}], followed by heating at 500 °C in an inert atmosphere of flowing argon gas. The resulting nanoalloy has been characterized by using EDXRF, AFM, XRD, magnetometery, {sup 57}Fe Mössbauer and impedance spectroscopies. These results showed that under provided experimental conditions iron and molybdenum metals, with known miscibility barrier, alloy together to give (1:1) single phase material having particle size in the range of 48–66 nm. The magnetism of iron is considerably reduced after alloy formation and shows its trend toward superparamagnetism. The designedmore » chemical synthetic procedure is equally feasible for the fabrication of other immiscible metals.« less
Authors:
 [1] ;  [2] ;  [1] ;  [3] ; ;  [4] ;  [5] ;  [6] ;  [4]
  1. Department of Chemistry, Quaid-i-Azam University, Islamabad 45320 (Pakistan)
  2. (Pakistan)
  3. Department of Chemistry, University of Malaya, Lembah Pantai, 50603 Kuala Lumpur (Malaysia)
  4. Physics Division, PINSTECH, P.O. Nilore, Islamabad (Pakistan)
  5. Material Science Laboratory, Department of Physics, Quaid-i-Azam University, Islamabad 45320 (Pakistan)
  6. HEJ Research Institute of Chemistry, University of Karachi, Karachi 75270 (Pakistan)
Publication Date:
OSTI Identifier:
22285202
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 48; Journal Issue: 11; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALLOYS; ATOMIC FORCE MICROSCOPY; CHLORIDES; CHLORINE; IMPEDANCE; INERT ATMOSPHERE; IRON; IRON 57; MAGNETIC PROPERTIES; MOLYBDENUM; PARTICLE SIZE; PYROLYSIS; SPECTROSCOPY; SUPERPARAMAGNETISM; SYNTHESIS; X-RAY DIFFRACTION; X-RAY FLUORESCENCE ANALYSIS