简介：蓝星集团承诺：从2004年到2008年，将以沈阳化工为主体在沈阳市至少投资75亿元，用于建设包括：110kt／a丙烯酸及酯、50kt／aPVC糊树扩产、30kt／a抗冲击改性剂、10kt／a气相白碳黑、500kt／aCPP及300kf／aPVC（包括200kt／a离子膜烧碱装置）6kt／a环氧丙烷及聚醚、

简介：Samplesofacobalt-basedalloythatunderwentasurfacetreatmentwereevaluated.Thesamples,whichwereobtainedbycastingalloyASTMF75,weregroundandpolishedononesideuntilamirrorfinishwasobtained.Thesampleswereencapsulatedinwollastonite(W)usinguniaxialpressure,treatedat1220℃for1handsubsequentlytemperedinwater.Thecharacterisationofthesampleindicatedthatpartoftheceramicencapsulatingmaterialwasmechanicallyincorporatedonthemetallicsurfacebygrowthoftheoxidelayerofthealloy.Afterthermaltreatment,aseriesofspecimensweresubmergedinasolutionwith5-foldsimulatedbodyfluid(5SBF)for3,5and21days.Characterisationbyscanningelectronmicroscopy(SEM),energydispersivespectroscopy(EDS)andX-raydiffraction(XRD)indicatednucleationandgrowthofahomogenouslayerofapatite,beginningonthethirddaywhenthesamplewassubmerged.

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简介：TheatomicscalecomputersimulationforinitialprecipitationmechanismofNi75Al6V19alloywascarriedoutforthefirsttimebyemployingthemicroscopicdiffusionequation.Theinitialprecipitationprocesswasinvestigatedthroughsimulatingtheatomicpicturesandcalculatingtheorderparametersofthetwokindsoforderedphases.Simulationresultsshowthattheγ′orderedphaseprecipitatedearlierthanθorderedphasebycongruentordering+spinodaldecompositionmechanismandthusproducedanonstoicheometricγ′singleorderedphase.Then,thenonstoichiometricθphaseprecipitatedbyanon-classicalnucleationandgrowthmechanismattheAPBSofγ′phase.

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