简介：GB/T26563-20111ScopeThisstandardspecifiestheterms,definitions,classification,brands,technicalrequirements,testmethods,inspectionrules,packing,marking,trans-portation,storage,andquality

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简介：Themechanicalpropertiesatelevatedtempera-turesofcorundum-mullitematerialsandtheeffectsofzirconiaandtitaniaadditionshavebeeninvesti-gated.Theresultsarecorrelatedwithchangesinmicrostructure,Basedontheresultsoftheseinvesti-gations,reaction-sinteredcorundum-mullite-zirco-niamaterialswithimprovedhotstrengthandther-malshockresistancehavebeendevelopedforrefractor-riesusage.

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简介：多晶的四角形的氧化锆的低温度老化行为被调查在阶段转变发生在这个过程期间上探索效果。XRD分析为阶段鉴定被进行并且对单斜晶的阶段转变四角形被决定。四角形的氧化锆多晶体的老化仅仅在标本的表面上与对单斜晶的阶段转变四角形的3个mol%Y2O3扳机做了，当在标本的体积内的穿入是很有限的时。在机械性质的细微减少也为40h在老化以后被观察。转变动力学表演标本上的一个成核和生长机制出现在在水环境的低温度老化主导。

简介：Inthispaper,zirconiaisusedastopmoldmaterialforTiinvestmentcasting.Topmoldsamplesaremadebypropermoldbuildingtechnology.Theeffectofdifferentsinteringtemperatureonchemicalcomposition,microstructureandresidualbendingstrengthofthetopmoldsampleisstudied.Thevolumeandhomogeneityoftheairholesinthetopmoldaredeterminedbysinteringtemperature,andfinallydeterminedtheresidualbendingstrengthofthemoldsamplewasdetermined.

简介：Theelectronicstructureof(001)polarsurfaceofcubiczirconiawasstudiedbyGGA(WC)approximation.Wefoundthecubiclatticenear(001)surfaceshowedanintensivetendencytotransfertotetragonallattice.Themetallicstateappearedonboththeterminations.ForO-termination,someO2pstateswerevacatedandholecarriersconcentratedonsurfaceoxygen-ions.ForZr-ermination,someZr4dstatesbecamepartialoccupiedforthelossofO2pstates.Weobservedtheholestatesweremainlylocalizedatthecorrespondingionsonsurfaceforboththeterminations,whilethechargestatesonZr-terminationweredispersedonsurface.

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简介：Yttria-stabilizecl-zirconia（YSZ）hollowspheresarewidelyutilizedfortheirnovelphysicalandchemicalproperties.However,developingasimpleandlow-costmethodforpreparingsuchhollowspheresstillremainsagreatchallenge.Inthispaper,anatmosphericplasmaspray（APS）methodisintroduced,andtheformationmechanismofhollow7YSZ（ZrO2-7wt%Y2O3）spheresispresented.Thehollowspheremorphologywasobservedbyscanningelectronmicroscopy（SEM）whenagglomeratedandsintered7YSZpowderswereused.Additionally,additivecompositionchanges,phasetransformations,andthethermalbehaviorof7YSZpowderswereanalyzedbyenergydispersivespectroscopy（EDS）,X-raydiffractometry（XRD）,thermogravimetricanalysis（TG）anddifferentialscanningcalorimeteranalysis（DSC）.Furthermore,thephasetransformationsofagglomeratedandsintered7YSZpowders,7YSZhollowspheresthatannealedatvarioustemperaturesfordifferenttimesareanalyzed.

简介：InthispaperwepresenttheresultsofstudiesonmakingMgOzirconiasinteredparts(intendedtobeusedasmeteringnozzlesincontinuouscastingofsteel)frommonocliniczirconiaandMgOpowdersviaagranulationprocess.Thepartswerepressedandsinteredunderdifferentconditions,andanalysedforphysicalproperties,microstructureandphasecomposition.WefoundastronginfluenceoftheMgOconcentrationandthesinteringcycle,especiallythecoolingrateonthethermalshockresistance.Thepaperconcludeswithrecommendationsfortheproductionofzirconiameteringnozzlesinaneconomicway.

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简介：掺杂物在在协议的sintering期间定制微观结构起一个关键作用。这些掺杂物可以在体积以内形成稳固的答案，或分离到谷物边界(GB)和稳固蒸汽的接口(免费表面)，引起管理质量的一种不同精力充沛的情形的各个在densification和谷物生长期间搬运。在这个工作，控制掺杂物分发的力量，特别地在表面和GB的并发的分离的可能性，基于分离的各自的热含量被讨论。一个方程基于系统的最小的吉布斯精力被导出从试验性的接口精力数据决定分离的热含量，并且当氧化钇的接口energetics上的掺杂物在它sintering的最后的阶段期间稳定了氧化锆，结果适用描绘La的角色。La实质地减少，这被显示出GB和表面精力(不同地)当sintering进行，动态地在这个阶段影响它的驱动力，和作为结果的谷物生长和densification。

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简介：Reactionsintereddensezirconia-mullitecompositeswerepreparedbyisostaticallypressingfromzirconflourandreactivealuminawithdifferentproportionsofTiO2andCr2O3additives.Thepressedcompactsweresinteredatdifferentelevatedtemperatureswithvariablesoakingtimes.Microstructuresandphasedevelopmentinthesinteredcompactswereanalysedtoassesstheinfluenceoftheadditivesonthepropertiesofthezirconiamullitecomposite.