Dry sliding tribological behaviors of nanocrystalline Cu–Zn surface layer after annealing in air
Powder compacting process was employed to fabricate nanocrystalline Cu–Zn alloy layer on the surface of coarse-grained copper matrix. The tribological behaviors of nanocrystalline surface layer after annealing in air were investigated. Sliding wear tests were performed on a pin-on-disk test machine...
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Published in | Wear Vol. 256; no. 7; pp. 747 - 753 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
01.04.2004
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Subjects | |
Online Access | Get full text |
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Summary: | Powder compacting process was employed to fabricate nanocrystalline Cu–Zn alloy layer on the surface of coarse-grained copper matrix. The tribological behaviors of nanocrystalline surface layer after annealing in air were investigated. Sliding wear tests were performed on a pin-on-disk test machine under dry conditions. The morphologies and element chemical states of the worn surfaces were examined with scanning electron microscopy (SEM) and X-ray photoelectron spectrometer (XPS), respectively. It was found that 300
°C annealed nanocrystalline surface layer presented optimum mechanical and tribological properties. The 300
°C annealed nanocrystalline surface layer showed remarkably high load-bearing capacity. A tribo-surface film almost covering entire worn surface was observed at applied load range from 60 to 160
N. This tribo-surface film was found to comprise elements from both the sliding counterparts. XPS analysis revealed the enrichment of nanocrystalline ZnO in the tribo-surface film, which can contribute to reduce friction coefficient and form a more steady and long life tribo-surface film. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0043-1648 1873-2577 |
DOI: | 10.1016/S0043-1648(03)00528-3 |