2012•Cailiao rechuli xuebaoRequires access
Microstructure and properties of plasma sprayed Cr_3C_(2p)/NiCr coatings on CrZrCu alloy surface
Ye Ruan
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Abstract
Cr3C2p particle reinforced NiCr composite coatings on CrZrCu substrate were prepared by plasma spraying.Microstructure of the coatings was characterized by scanning electron microscopy(SEM) and X-ray diffraction(XRD),and the wear resistance of the plasma sprayed Cr3C2p/NiCr and electroplated NiCo coatings were examined on a abrasive tester.The results show that the plasma-sprayed Cr3C2p/NiCr composite coatings present lamellar structure as characteristics.Unmelted Cr3C2 particles and Cr7C3,Cr2Ni3 and CrNi precipitates disperse in NiCr-base coatings.The Cr3C2p/NiCr coatings have higher hardness and abrasive wear resistance compared with Ni-Co plating coatings,and the weight loss of the composite coatings is only 35% of that of the plating coatings.