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The effects of slippage on rolling contact of pearlitic wheel–rail steels (rail-U71Mnk/wheel-ER8 steels for China high-speed railway) have been investigated in the laboratory on a twin disc tester under different slippages (varying from 0.17%, 0.91%, 2.38%, 4.55%, to 9.43%). The morphology of the worn surface and the cross-sections have been detected by scanning electron microscopy (SEM), and the...
In this paper, spark plasma sintering is employed to synthesize a variety of self-lubricating ZrO 2 (Y 2 O 3 ) matrix composites by tailoring the chemical compositions. The additives of BaF 2 , CaF 2 , Ag, Ag 2 O, Cu 2 O, BaCrO 4 , BaSO 4 , SrSO 4 and CaSiO 3 were incorporated into the ceramic matrix to evaluate...
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