简介：Apreliminaryapplicationofthedigitalimagecorrelation(DIC)ispresentedaimingtodetectandanalyzecracknetworkswhichareinducedbystressesarisingduringcuringanddrying(CD)ofMgOcontainingrefractorycastableslabs.SurfaceimagesofcastablesamplesplacedinaspeciallydesignedclimaticchamberwererecordedovertheCDstageswithadigitalcameraandprocessedbytheDICtechniquetomeasurethedisplacementfields.Post-processingDICresultswerecarriedouttoestimatethelength,orientationandopeningofcracksinthenetworks.Themethodologyishighlightedandthefirstexperimentalresultsareshownpointingoutitsfuturepotentialtobetterunderstandtheeffectofthephysicalaspects(particlesize,chemicalanalysis,temperature,etc.)andthestructuralones(slabshapeandsize)onprocessingandperformanceofadvancedrefractorycastables.

简介：NickelnitratewasintroducedintocarbonblocksbyusingECAaggregatesascatalyst-carrier.TheNi-containinganthraciteaggregateswerefirstlypreparedbymixinganthraciteaggregatesinnickelnitrateethanolsolutionandthenincorporatedintocarbonblocksafterpre-treating.Thephasecomposition,microstructureandpropertiesofallcarbonblocksfiredat1000℃or1400℃inacokebedwerestudiedwiththeaidofanX-raydiffractomer,afieldemissionscanningelectronmicroscope,amercuryporosimetryandalaserthermalconductivitymeter.TheresultsshowedthattheadditionofNi-containinganthraciteaggregatespromotedtheformationofone-dimensionalnanocarbonandβ-SiCwhiskersat1000℃andthegrowthofβ-Sialonat1400℃,respectively.Moreover,thecoldcompressivestrengthandmicroporositycharacteristicsofthecarbonblockswiththeadditionofNi-containinganthraciteaggregateswereenhancedandthethermalconductivitywasremarkablyimprovedattributingtothehighheatconductivenetworkformedbytheceramicphases.