Details

Autor(en) / Beteiligte

• Li, W.L.
• Tao, N.R.
• Han, Z.
• Lu, K.

Titel

Comparisons of dry sliding tribological behaviors between coarse-grained and nanocrystalline copper

Ist Teil von

• Wear, 2012-01, Vol.274-275, p.306-312

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

2012

Quelle

Access via ScienceDirect (Elsevier)

Beschreibungen/Notizen

• ► The COFs of NC and CG Cu are comparable without oxidation and delamination. ► As oxidation and delamination occur, the COF of either CG or NC Cu increases to a constant value. ► The enhanced wear resistance of the NC Cu is mainly attributed to its higher hardness. Dry sliding tribological behaviors of nanocrystalline (NC) and coarse grained (CG) Cu were studied by using a ball-on-plate tribometer with a counterface ball of cemented tungsten carbide. The results showed that prior to oxidation and delamination, the steady-state friction coefficients (FCs) of NC and CG Cu are comparable (∼0.35). As oxidation with delamination of wear surface occur, the FC for either CG or NC Cu increases gradually, approaching a steady-state FC (∼0.63). The wear resistance of the NC Cu was enhanced by at least one order of magnitude under the measured loads ranging from 5N to 25N in comparison with the CG counterpart, which is mainly attributed to the higher hardness of the NC layer.