简介：Inthisstudy,twokindsofWC–Cocoatingswithdifferentdecarburizationlevelsweredepositedbyhigh-velocityoxy-fuel(HVOF)sprayingusingtheultrafineWC–Cocompositepowderandcommercialmicronsizedpowder,respectively.Thehardnessandelasticmodulusweremeasuredonthetopsurfaceandcrosssectionsofthepreparedcoatingsbythenanoindentationmethod.Theresultsshowthattheultrafine-structuredcoatinghasmuchhigherdensityandinhibiteddecarburizationthantheconventionalcoating,whichthusresultsinhigherhardnessandelasticmodulusvaluesthanthemicronsizedcoating.Thewearresistanceofthermal-sprayedcermetcoatingsgreatlydependsonthecross-sectionalhardnessandelasticmoduluswhichreflectsthebondstrengthbetweensplatstosomeextent.Basedontheanalysis,abetterunderstandingofthemicrostructureandpropertiesincermetcoatingmaterialswasobtained.