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中文摘要：
In this paper,NiCr-Cr3C2 coating was deposited onto AISI 1045 steel substrate by employing supersonic plasma spraying technique.The surface and cross-section morphologies of the NiCr-Cr3C2 coating were observed by SEM.The phase constituents of the coating were identified by XRD.The SEM images showed that the coating was very dense,and it had a low porosity structure.The XRD pattern implied that the coating was mainly composed of NiCr,Cr3C2 and Cr7C2.Nanoindentation tests were performed on the coating surface by a Nano indenter.The widely used Oliver-Pharr method was adopted to extract the mechanical properties of the coating.The hardness exhibited a strong peak-load-dependence,i.e.indentation size effect;the elastic modulus was not affected by indentation size effect.
英文摘要：
In this paper,NiCr-Cr3C2 coating was deposited onto AISI 1045 steel substrate by employing supersonic plasma spraying technique.The surface and cross-section morphologies of the NiCr-Cr3C2 coating were observed by SEM.The phase constituents of the coating were identified by XRD.The SEM images showed that the coating was very dense,and it had a low porosity structure.The XRD pattern implied that the coating was mainly composed of NiCr,Cr3C2 and Cr7C2.Nanoindentation tests were performed on the coating surface by a Nano indenter.The widely used Oliver-Pharr method was adopted to extract the mechanical properties of the coating.The hardness exhibited a strong peak-load-dependence,i.e.indentation size effect;the elastic modulus was not affected by indentation size effect.
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