以柔克刚-提高耐火材料抗热震性

以柔克刚—提高耐火材料抗热震性郑州大学高温材料研究所叶国田以柔克刚—提高耐火材料抗热震性•Justtotouchthehugeandcomplicatedtopic•Nottoanswer/solvequestions•Buttoraisequestions/suggestions•Theideasarenotnecessarilynew.•Theideaswereproposedbeforebyotherpeopleinawayoranother,oreveninpractice题外话–研究题目•我们高温所研究生的研究题目：“加入Al粉对MgO-C砖结构和性能的影响”•结果：AP,BD,CCS,MOR,HMOR，PLC,TRS,SCR,XRD,SEM•结论：把对Al粉对以上性能、相组成、显微结构的影响进行总结•以上题目和结论有没有问题？题外话–研究题目•【药品名称】品名：维C银翘片•【功能主治】用于流行性感冒引起的发热、头痛、咳嗽、口干、咽喉疼痛。•【不良反应】尚无报道。•“加入Al粉对MgO-C砖结构和性能影响”•主要目标：对什么具体性能的影响？•结论提及：对其他性能有没有负面影响？Hasselman’sthermalshocktheory•AccordingtoHasselman’sthermalshocktheory,thedrivingforceforcrackpropagationisproportionaltothestoredelasticenergyinthebodyatonsetoffracture.Hasselman,D.P.H.Unifiedtheoryofthermalshock,fractureinitiationandcrackpropagationinbrittleceramics.JournalofAmericaCeramicSociety,V.52,No.11,600-604,1969.Thermalstressdependenceonmodulusofelasticity•Thermalstress=E·=E··T•TEC：dependentonthematerial•T：determinedbytheapplicationconditions•Inordertoreduce，Ehastobereduced•Eisdeterminedbymicrostructure（microcracks,phasedistribution,etal）•Microstructureisgeneratedbyprocessing“Refractoriesselectionforsteelladles”(MarcoAntonioQuintela,FabioDuarteSantos,CelsoAnizioPessoa,JoseAnchietaDeRodrigues,VictorCarlosPandolfelli,UNITECR'05-ProceedingsoftheUnifiedInternationalTechnicalConferenceonRefractories,p380-384).以柔克刚–微裂纹SofteningthroughmicrocracksRefractoriesselectionforsteelladlesMarcoAntonioQuintela,FabioDuarteSantos,CelsoAnizioPessoa,JoseAnchietaDeRodrigues,VictorCarlosPandolfelli,UNITECR'05-ProceedingsoftheUnifiedInternationalTechnicalConferenceonRefractories,p380-384“Refractoriesselectionforsteelladles”(MarcoAntonioQuintela,FabioDuarteSantos,CelsoAnizioPessoa,JoseAnchietaDeRodrigues,VictorCarlosPandolfelli,UNITECR'05-ProceedingsoftheUnifiedInternationalTechnicalConferenceonRefractories,p380-384).MgO-Cladlebrickbinderanti-oxidantMC1pitchAlMC2pitch-MC3resinAlMC4resin-SamplesofMgO-Cbricks“Refractoriesselectionforsteelladles”(MarcoAntonioQuintela,FabioDuarteSantos,CelsoAnizioPessoa,JoseAnchietaDeRodrigues,VictorCarlosPandolfelli,UNITECR'05-ProceedingsoftheUnifiedInternationalTechnicalConferenceonRefractories,p380-384).HMORoftheMgO–CrefractorybricksHotmodulusofrupture(HMOR)asafunctionoftemperature“Refractoriesselectionforsteelladles”(MarcoAntonioQuintela,FabioDuarteSantos,CelsoAnizioPessoa,JoseAnchietaDeRodrigues,VictorCarlosPandolfelli,UNITECR'05-ProceedingsoftheUnifiedInternationalTechnicalConferenceonRefractories,p380-384).Carbonlossandoxidationindexat1400Cafter30minuteinair.Oxidationresistance“Refractoriesselectionforsteelladles”(MarcoAntonioQuintela,FabioDuarteSantos,CelsoAnizioPessoa,JoseAnchietaDeRodrigues,VictorCarlosPandolfelli,UNITECR'05-ProceedingsoftheUnifiedInternationalTechnicalConferenceonRefractories,p380-384).ThermalshockresistanceoftheMgO–CbricksLongitudinalcrosssectionofsamplesafterThermalspallingtest:metalinfiltration().BehaviorofthethermalshockresistanceasafunctionoftheHMOR(1400˚C).“Refractoriesselectionforsteelladles”(MarcoAntonioQuintela,FabioDuarteSantos,CelsoAnizioPessoa,JoseAnchietaDeRodrigues,VictorCarlosPandolfelli,UNITECR'05-ProceedingsoftheUnifiedInternationalTechnicalConferenceonRefractories,p380-384).Thermalshocktestingwascarriedoutinaninductionfurnaceat1560C.Aprismaticsample(40mmx40mmx160mm)waspartlyimmersedinthesteelandmaintainedattestingtemperaturefor60s.Following,thesamplewascooledinwaterfor15sandtheninair.Thethermalcycling(heatingandcooling)wasrepeated3times.Thermalshockdamagewasevaluatedbythesizeandnumberofcracksgeneratedinthesamples.SlagcorrosionresistanceFig.2RelativecorrosionindexoftheMgO-Cbricks.Rotaryslagtestswerecarriedoutonsamplesmeasuring(88mm;68mm)x30mmx190mmat1650°Cfor6h.Thecorrosionindexwasdeterminedbytheratiobetweenthecrosssectionareaafterandbeforetesting.“Refractoriesselectionforsteelladles”(MarcoAntonioQuintela,FabioDuarteSantos,CelsoAnizioPessoa,JoseAnchietaDeRodrigues,VictorCarlosPandolfelli,UNITECR'05-ProceedingsoftheUnifiedInternationalTechnicalConferenceonRefractories,p380-384).Resultsofindustrialperformance•Consideringthetraditionalevaluationmethodformaterials,basedonmechanicalstrength,oxidationandcorrosion,whichonewouldbethebestmaterialforslaglineofsteelladle?•ThebestoneshouldnotbeMC2,becauseitscorrosionresistancearesimilartotheotherthreeanditsHMORisremarkablylowerthanMC1andMC3.“Refractoriesselectionforsteelladles”(MarcoAntonioQuintela,FabioDuarteSantos,CelsoAnizioPessoa,JoseAnchietaDeRodrigues,VictorCarlosPandolfelli,UNITECR'05-ProceedingsoftheUnifiedInternationalTechnicalConferenceonRefractories,p380-384).ResultsofindustrialperformanceButMC2presentedsuperiorindustrialperformance!“Refractoriesselectionforsteelladles”(MarcoAntonioQuintela,FabioDuarteSantos,CelsoAnizioPessoa,JoseAnchietaDeRodrigues,VictorCarlosPandolfelli,UNITECR'05-ProceedingsoftheUnifiedInternationalTechnicalConferenceonRefractories,p380-384).Resultsofindustrialperformance•ButMC2presentedsuperiorindustrialperformancetoMC1,MC3andMC4.•Thesuperiorperformanceatindustrialscaleofbrick