简介:简要介绍了托烷类化合物去甲基的方法。改进了文献报道了6β-乙酰氧基-3-酮基去甲托烷的合成方法,加入除酸剂,提高了原料的转化率。
简介:[篇名]Amethodofmakingborideandvitreouscompoundbypowdermetallurgy,[篇名]Ceramic-metalcompositesobtainedbyreactiveprcssurclcsscountcrflowinlitration/pcnctration(RPCI)ofaceramicsubstratewithtwodifferentmetallicinfiltrants,[篇名]CharacterizationofDirectionallySolidifiedB{sub}4C-TiB{sub)2andB{sub)4C-SiCEutecticCompositesPreparedbyFloating-ZoneMethod,[篇名]Corrosionresistanceofanironbaseboridccermetswithoxidesurfacelayersnamoltenalalloy,[篇名]Crackpropagationcharacteristicsandfracturesurfaceenergyofborideconners,[篇名]Depositionofhardand/orcorrosionresistant,singleandmultielementcoatingsonferrousandnonferrousalloysinfluidizedbedreactor,[篇名]Depositionofprotectivecoatingsontungstenfreehardalloys。
简介:Developmentandpracticalapplicationofborideasengineeringceramics;Developmentandpracticalapplicationofborideasengineeringceramics;Effectofboronmicro-alloyingonmicrostructureandmechanicalpropertiesoffine-grainedCM247LCsuperalloy;Effectsofmetallicelementsonthermoelectricpropertiesofsiliconborides