简介：Ultra-finetitaniumcarbonitride(TiCN)matrixmaterialswithagrainsizelessthan1μmweresuccessfullypreparedbyvacuummicrowavesintering.ThemillingprocessforrawTiCNparticlesandthemicrostructureandpropertiesofcermetsproducedwithacompositionof15wt.%WC-17wt.%(Co+Ni)-9wt.%Mo2C-59wt.%Ti0.7N0.3andsinteredbyvacuummicrowavewereanalyzedbyscanningelectronmicroscopy(SEM)andX-raydiffraction(XRD).Theresultsshowthataball-to-powdermassratioof8:1andamillingtimeof50hprovidedappropriateconditionsfortheproductionofultra-fineTiCNsolidsolutionpowders.Theuseofvacuummicrowavesinteringproducedcermetswithmuchfinergrainandblackcorestructuresandhigherrelativedensityandhardnessthanthoseproducedbyvacuumsinteringtechnology.

简介：采用多靶磁控溅射技术，制备TiCN、VCN单层膜及一系列调制比为1的不同调制周期的TiCN／VCN多层膜。利用X射线衍射仪、纳米压痕仪、高温摩擦磨损测试仪和扫描电子显微镜，研究各种薄膜的微结构、力学性能及室温和高温摩擦磨损性能。研究表明：不同调制刷期的TiCN／VCN多层膜的硬度围绕混合法则计算的硬度值上下波动，没有出现致硬现象。TiCN和VCN单层薄膜室温下的摩擦因数很低，TiCN／VCN多层膜调制周期较小时摩擦因数较高，调制周期大于10nm时摩擦因数逐渐接近TiCN和VCN单层膜。700℃下，TiCN／VCN多层膜的摩擦因数主要取决于表面生成的TiO2和v205的共同作用，与TiCN相比，TiCN／VCN多层膜的高温摩擦因数较小。

简介：Inordertosolvethehigh-priceandshort-lifetimeproblemsofthecutterofagriculturalmachinery,andimprovethewearresistanceofthecutter,theTiCN/FemetalceramiccompositecoatingwaspreparedonthesubstrateofQ235steelbyreactionnitrogenarccladdingtechnique.ThemixturepowderoftitaniumandgraphitewaspreplacedontheQ235steelsurfaceafterintensivemixingbyplanetaryballmillandgluingwithstarchbinder.Themicrostructureandphaseofthecoatings,interfacebehaviorbetweencoatingsandthesubstratewereinvestigatedbyscanningelectronicmicroscopeandX-raydiffractometer.Themicro-hardnessdistributionofthecoatingsectionwastestedbymicro-hardnesstester.Frictioncoefficientandwearweightlossweremeasuredbyabrasionmachine.Wearingsurfacemorphologywasinvestigatedbyscanningelectronicmicroscope.TheresultsshowthatanexcellentbondingbetweenthecoatingsandtheQ235steelsubstrateisensuredbythestrongmetallurgicalinterfaceandphaseofthecoatings.ThecoatingsaremainlycomposedofTiCN.Thehighestmicrohardnessofthecoatingsreaches1089HVO.2,whilethemicro-hardnessofQ235steelsubstrateisonlyabout286HVO.2.Theanti-abrasivetestresultsshowthatthewearresistanceofthecladdingcoatingisbetterthanthatofquenchedandtempered65Mnsteelwhichisoftenusedascutterofagriculturalmachinery.ThefieldtestresultsshowthattheTiCN/Femetalceramiccompositecoatingpreparedbyreactionnitrogenarccladdingisfeasibletothemanufactureandremanufactureofthecutterofagriculturalmachinery.