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The Friction and Wear Properties of Ti–Al–Nb Intermetallics by Plasma Surface Alloying

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Abstract

Both plasma chromizing and carburization following plasma chromizing (duplex treatment) for Ti–Al–Nb alloy were performed, respectively, and the microstructure, dynamic ultra-microhardness, and elastic modulus of the alloying layer were determined. Using silicon nitride (Si3N4) balls as the counterface materials, dry sliding friction tests on the substrate, the chromized layer, and the duplex-treated layer were completed by ball-on-disk tribometer at room temperature. The results indicated that the duplex-treated layer was mainly composed of Cr23C6, Cr2Nb, pure chromium, and carbon phases, while the chromized layer consisted of Al8Cr5 and Cr2Nb phases. The ultra-microhardness of the duplex-treated layer was higher than that of the chromized layer, whereas the elastic modulus of the duplex-treated layer was lower than that of the chromized layer. The friction coefficient of the duplex-treated layer was about three times lower than that of the chromized layer, while the wear rate was one order of magnitude lower than that of the chromized layer.

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Acknowledgment

This work was supported by the Natural Science Foundation of Jiangsu Province China through the Project No.BK2005128.

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Authors and Affiliations

  1. College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China

    Hongyan Wu, Pingze Zhang & Zhong Xu

  2. Department of Material Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China

    Jianliang Li

  3. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China

    G. Hussain

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  1. Hongyan Wu
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  2. Pingze Zhang
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  3. Jianliang Li
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  4. G. Hussain
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  5. Zhong Xu
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Correspondence to Pingze Zhang.

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Wu, H., Zhang, P., Li, J. et al. The Friction and Wear Properties of Ti–Al–Nb Intermetallics by Plasma Surface Alloying. Tribol Lett 30, 61–67 (2008). https://doi.org/10.1007/s11249-008-9314-5

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  • DOI: https://doi.org/10.1007/s11249-008-9314-5

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