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Preparation of Cu-TiC Nanocomposite and Investigation of Microstructure, physical and Mechanical Properties

Bagheri, Gholamali | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 44340 (07)
  4. University: Sharif University of Technology
  5. Department: Materials Science and Engineering
  6. Advisor(s): Pourazarang, Kazem; Abachi, Parvin
  7. Abstract:
  8. In this study, Cu-TiC nanocomposites were produced by high energy ball milling of elemental powders and in situ formation of TiC in the copper base. Cu and 5,10,20 and 40 wt% Ti powder blend were milled for 60 h, then graphite powders were added and milling was continued for 10 h again and Finally Cu-TiC composite powders with 10.68, 20.16, 36.24 and 60.25 vol% of reinforcements (6.18, 12.2, 23.82 and 45.47 wt%) were produced. The effect of time on the solution of titanium in the copper was studied by X-Ray diffraction analysis (XRD). crystallite size and lattice strain of copper were determined 12nm and 1.04% subsequently for Cu-40wt%TiC after 60 h milling. to ensure the formation of titanium carbide XRD analysis was done after pressing at 300 MPa and sintering at 900ºC for an hour (rate of heating was 2.5ºC/min). powders morphology in different times of milling process and microstructure of composites were investigated with scanning electron microscopy (SEM) and field emission scanning electron microscopy (FESEM). Finally, densitometry, hardness, determination of electrical resistance and pin on disk wear test were done and effect of reinforcement percentages on the physical and mechanical properties of composites was investigated
  9. Keywords:
  10. Nanocomposite ; Mechanical Alloying ; X Ray Diffraction ; In-Situ Reaction

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