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The effect of reinforcement percentages on properties of copper matrix composites reinforced with TiC particles

Bagheri, Gh. A ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jallcom.2016.03.085
  3. Publisher: Elsevier Ltd
  4. Abstract:
  5. In this research, copper matrix composites reinforced with different amounts of titanium carbide particles were produced by mechanical milling and in-situ formation of reinforcements. Morphology and size of milled powders were inspected by scanning electron microscopy (SEM) several times during milling process. Changes in lattice parameter, crystallite size, lattice strain, dislocation density and Gibbs free energy changes (due to increasing in dislocation densities and grain boundaries) in different samples (with different TiC particles contents) were studied by X-Ray Diffraction technique with Cu-kα radiation and using Nelson-Riley method and Williamson-Hall equation. Microstructure of samples after sintering was investigated by FESEM. Finally, densitometry, hardness, determination of electrical resistance and pin on disk wear test were performed and effect of reinforcement percentages on the physical and mechanical properties of composites was studied. Results show incredible improvement in mechanical properties with increasing in TiC value, even though, electrical conductivity dropped off considerably
  6. Keywords:
  7. Copper ; Crystallite size ; Free energy ; Gibbs free energy ; Grain boundaries ; Mechanical alloying ; Mechanical properties ; Metallic matrix composites ; Milling (machining) ; Reinforcement ; Scanning electron microscopy ; Sintering ; Titanium carbide ; X- ray diffraction ; Copper matrix composite ; Electrical conductivity ; Electrical resistances ; Gibbs free energy changes ; Mechanical milling ; Physical and mechanical properties ; Williamson-Hall equation ; X-ray diffraction techniques ; Particle reinforced composites
  8. Source: Journal of Alloys and Compounds ; Volume 676 , 2016 , Pages 120-126 ; 09258388 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0925838816306545