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Research Papers: Friction and Wear

High Temperature Lubricating Behavior of NiAl Matrix Composites With Addition of CuO

[+] Author and Article Information
Shengyu Zhu, Jun Cheng, Zhuhui Qiao

State Key Laboratory of Solid Lubrication,
Lanzhou Institute of Chemical Physics,
Chinese Academy of Sciences,
Lanzhou 730000, China

Yuan Tian

Aerospace Research Institute of Materials
and Processing Technology,
Beijing 100076, China

Jun Yang

State Key Laboratory of Solid Lubrication,
Lanzhou Institute of Chemical Physics,
Chinese Academy of Sciences,
Lanzhou 730000, China
e-mail: jyang@licp.cas.cn

1Corresponding author.

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received May 13, 2015; final manuscript received February 20, 2016; published online May 18, 2016. Assoc. Editor: Robert Wood.

J. Tribol 138(3), 031607 (May 18, 2016) (9 pages) Paper No: TRIB-15-1156; doi: 10.1115/1.4033133 History: Received May 13, 2015; Revised February 20, 2016

High temperature self-lubricating NiAl matrix composites with addition of CuO (15, 20, and 25 wt.%) were fabricated by powder metallurgy technique, and the tribological behavior from room temperature to 1000 °C was investigated. It was found that Ni–Cu and Al2O3 phases formed during the fabrication process due to reaction of NiAl and CuO. The tribological results showed that the composite with addition of 25 wt.% CuO has a favorable friction coefficient of about 0.2 and excellent wear resistance with the magnitude of 10−6 mm3 N−1 m−1 at high temperatures (800 and 1000 °C).

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Figures

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Fig. 1

XRD spectrum of CU25

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Fig. 2

FESEM images show elemental distribution of CU25 (Ni, Al, Cr, Mo, Cu, and O)

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Fig. 3

Curves of the evolution of friction coefficients of the samples with sliding time at different temperatures: (a) and (b) frictional curves of CU15 at 20, 600, 800, and 1000 °C; (c) and (d) frictional curves of CU20 at 20, 600, 800, and 1000 °C; (e) and (f) frictional curves of CU25 at 20, 600, 800, and 1000 °C

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Fig. 4

Variation of wear rates of the samples with addition of different CuO content at different temperatures

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Fig. 5

Worn surfaces of CU15 at different temperatures

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Fig. 6

Worn surfaces of CU20 at different temperatures

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Fig. 7

Worn surfaces of CU25 at different temperatures

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Fig. 8

Cross sections of CU25 after wear at 800 °C (a) and 1000 °C (b)

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Fig. 9

XPS results of worn surfaces of CU25 at different temperatures

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Fig. 10

Worn surfaces of the coupled Si3N4 ceramic balls at different temperatures: 20 °C (a) and 600 °C (b), 800 °C (c), and 1000 °C (d)

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Fig. 11

EDS results of worn surfaces of the coupled Si3N4 ball at different temperatures: 800 °C (a) and 1000 °C (b)

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