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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/4185

Title: Wear characteristic of exfoliated graphite nano sheets/copper metal matrix composite
Authors: Ashraf, Ali A.
Keywords: Wear characteristic
Exfoliated graphite
Nano sheets/copper
Metal matrix
Issue Date: 2008
Publisher: King Saud University
Citation: The Sixth International Scientific Conference
Abstract: Powder Metallurgy technique has been used to prepare composite samples made of exfoliated graphite nano sheets (EGNS) and graphite flakes (GF) of 1, 3 and 5 weight % with copper chips. Effect of both graphite and its size on morphological, mechanical, and tribological behavior of copper matrix composite has been investigated. Some unexpected characteristics have been identified due to the addition of graphite flakes and its exfoliated nano sizes with copper metal matrix. Nano-like grain boundary (NLGB) phenomenon has been reported. A decrease in hardness has been measured within the used weight fractions. Surprisingly, there was an increase in wear rates with an increase in wt% GF added to the copper matrix. In the case of EGNS, an increase in wear rate is reported for a weight fraction of 1%, which then decreases as more EGNS is added until it reaches approximately the same wear rate of pure Cu matrix at 5% EGNS. It is believed that the increase in wear at 1% EGNS is due to delamination domination theory. Measuring the counter part wear characteristics more deeply, evaluating the dispersion quantitatively, and explaining the delaminating theory of the EGNS/Cu metal matrix composites is recommended for future work.
URI: http://hdl.handle.net/123456789/4185
Appears in Collections:College of Engineering in Al-Kharj

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