Metallurgical and Materials Transactions A

, Volume 37, Issue 7, pp 2033–2038

Enhanced solubility Ag-Cu nanoparticles and their thermal transport properties

  • Abdullah Ceylan
  • Katie Jastrzembski
  • S. Ismat Shah
Article

DOI: 10.1007/BF02586123

Cite this article as:
Ceylan, A., Jastrzembski, K. & Shah, S.I. Metall and Mat Trans A (2006) 37: 2033. doi:10.1007/BF02586123

Abstract

Ag-Cu alloy nanoparticles were prepared by the inert gas condensation (IGC) process. X-ray diffraction (XRD) patterns show that particles were phase separated as pure Cu and Ag with some Cu incorporated in the Ag matrix. The particle size obtained either from Scherer’s formula or electron microscopy images shows no systematic change of the size of either pure Cu or Ag-Cu particles in the evaporation temperature range between 800 °C and 1400 °C. By using lattice constant values and Vegard’s law, the composition of Cu in Ag particles was calculated to be 6.6 vol pct. Analyses of the alloy nanoparticles suspended in hydrocarbon rotary pump oil were also carried out in order to determine the changes in thermal conductivity and viscosity of nanofluids. Thermal transport measurements have shown that there is a limit to the nanoparticle loading for the enhancement of the thermal conductivity. This maximum value was determined to be 0.006 vol pct Ag-Cu nanoparticles, which led to the enhancement of the thermal conductivity of the pump oil by 33 pct. Beyond this maximum loading, thermal conductivity decreased and reached back to the pure oil thermal conductivity value.

Copyright information

© ASM International & TMS-The Minerals, Metals and Materials Society 2006

Authors and Affiliations

  • Abdullah Ceylan
    • 1
    • 2
  • Katie Jastrzembski
    • 3
  • S. Ismat Shah
    • 4
  1. 1.the Department of Physics and AstronomyUniversity of DelawareNewark
  2. 2.the Physics Engineering DepartmentHacettepe UniversityAnkaraTurkey
  3. 3.the Chemical Engineering DepartmentUniversity of DelawareUSA
  4. 4.the Department of Physics and Astronomy and the Department of Materials Science and EngineeringUniversity of DelawareUSA