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Research Papers: Friction & Wear

Friction and Wear Behavior of Nano-Al2O3 Particles Reinforced Copper Matrix Composites

[+] Author and Article Information
Guobin Li

Marine Engineering College,
Dalian Maritime University,
Dalian 116026, China
e-mail: guobinli88@163.com

Ningning Peng

Marine Engineering College,
Dalian Maritime University,
Dalian 116026, China
e-mail: 245339177@qq.com

Di Sun

Marine Engineering College,
Dalian Maritime University,
Dalian 116026, China
e-mail: sundi6329@sina.com

Shude Sun

Marine Engineering College,
Dalian Maritime University,
Dalian 116026, China
e-mail: vikingssd@gmail.com

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received March 23, 2014; final manuscript received July 1, 2014; published online October 3, 2014. Assoc. Editor: Dae-Eun Kim.

J. Tribol 137(1), 011604 (Oct 03, 2014) (7 pages) Paper No: TRIB-14-1063; doi: 10.1115/1.4028486 History: Received March 23, 2014; Revised July 01, 2014

A series of copper–Al2O3 composite materials (CACMs) with 0, 2, 4, and 6 wt.% of Al2O3 (average size about 80 nm) was fabricated by powder metallurgy method. The tribological behavior of CACMs was investigated by a ring-on-block sliding friction test. The results show that the hardness and the wear resistance of CACMs are improved by the addition of Al2O3. The CACMs with 0% Al2O3 (pure copper) shows the mechanism of adhesive wear and have very poor wear resistance. By comparing with the pure copper, the wear resistance of the CACMs with 2% and 6% Al2O3 is improved. When the proportion of Al2O3 is 4%, slightly abrasive wear occurs at the interface between two sliding surfaces, and the CACMs achieve higher wear resistance in comparison to that with 2% and 6% Al2O3.

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Figures

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Fig. 1

Schematic illustration of CFT-I tribometer. (a) Tribometer and (b) sample.

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Fig. 2

SEM image of CACMs with different proportion of Al2O3 (wt.%): (a) 0%, (b) 2%, (c) 4%, and (d) 6%

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Fig. 3

Surface indentation with different proportion of Al2O3 (wt.%): (a) 0%, (b) 2%, (c) 4%, and (d) 6%

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Fig. 4

Variations of the friction coefficient in the running-in process for CACMs with different proportions of Al2O3 (wt.%): (a) 0%, (b) 2%, (c) 4%, and (d) 6%

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Fig. 5

Variations of the friction coefficient with time under different loads for CACMs with different proportion of Al2O3 (wt.%): (a) 0%, (b) 2%, (c) 4%, and (d) 6%

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Fig. 6

Profiles curves across the center of the wear scars after test. (a) 0%, (b) 2%, (c) 4%, and (d) 6%.

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Fig. 7

LSCM image of worn and the unworn regions of block sample surfaces after test. (I) 0%, (II) 2%, (III) 4%, and (IV) 6%.

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