DSC在新材料研究中

會(huì)計(jì)學(xué)1DSC在新材料研究中磁性合金TheFe–Si–B–Cu–Nbamorphousalloywiththecompositions:Fe73.5Si13.5B9Nb3Cu1afterappropriateannealingexhibitsexcellentmagneticproperties,thesesuperiorpropertiesresultfromcrystallizationofaninitiallyamorphousmaterial,leadingtotheformationofnanocrystals(about10nminsize)oftheFe3Siphaseintheremainingamorphousmatrix第1頁(yè)/共23頁(yè)ThisalloyisnowavailablecommerciallyasFinemet.一個(gè)非常了不起的發(fā)明。YoshizawaY,OgumaS,YamauchiK(1988)第2頁(yè)/共23頁(yè)TheeffectofCopperalloyingadditionsonthecrystallizationofanamorphousFe–Si–BalloyY.R.Zhang，R.V.Ramanujan第3頁(yè)/共23頁(yè)第4頁(yè)/共23頁(yè)第5頁(yè)/共23頁(yè)ThefirstpeakcorrespondstotheformationoftheFe3SiphaseandthesecondpeakindicatestheappearanceoftheFe3Bcompound.第6頁(yè)/共23頁(yè)ItshowedthatCualloyingadditionmadeprimarycrystallizationeasiersuggestingthatitenhancesthekineticsofcrystallization.FortheFe–Si–B–CualloythemicrostructuralMicrostructuralevolutionwassignificantlydifferent:foraheattreatmenttemperatureof420C,insteadofadendriticmorphology,spheroidalcrystalslessthan100nminsizewereobservedasthefirstcrystallizationproducts第7頁(yè)/共23頁(yè)IntheFe–Si–Balloysystems,adendriticmorphologyiscommonlyobservedduetosoluterejectionduringcrystallizationresultinginconstitutionalsupercooling.反差多么強(qiáng)烈！第8頁(yè)/共23頁(yè)更復(fù)雜的合金第9頁(yè)/共23頁(yè)納米Al合金第10頁(yè)/共23頁(yè)第11頁(yè)/共23頁(yè)第12頁(yè)/共23頁(yè)第13頁(yè)/共23頁(yè)第14頁(yè)/共23頁(yè)第15頁(yè)/共23頁(yè)焊接釬料第16頁(yè)/共23頁(yè)第17頁(yè)/共23頁(yè)你選擇什么工藝制造釬料？第18頁(yè)/共23頁(yè)第19頁(yè)/共23頁(yè)第20頁(yè)/共23