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

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 mill...

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Bibliographic Details
Published in:Journal of alloys and compounds 2016-08, Vol.676, p.120-126
Main Author: Bagheri, GH.A.
Format: Article
Language:English
Subjects:
COMPOSITES
Copper
Copper matrix composite
DENSITY
Dislocation density
LATTICE PARAMETERS
MATHEMATICAL ANALYSIS
Mechanical milling
MECHANICAL PROPERTIES
Particulate composites
PROPERTIES
REINFORCEMENT
Scanning electron microscopy
Titanium carbide
X-ray diffraction
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Summary: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. •Microstructures, mechanical and physical properties of composites have been studied.•Stored Gibbs free energy of dislocations and grain boundaries has been calculated.•Gibbs free energy increased with increasing in titanium percent.•Higher TiC percentage led to better mechanical and unfavorable physical properties.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2016.03.085