简介:Themorphology,structureanddistributionoftherareearthcompoundsintheYG8R.YT5RandYT14Rcementedcarbideswithadditionsoftracelightrareearthswerestudiedwithananalyticalelectronmicroscope.TheparticlesoftherareearthcompoundsinthesealloysareallsphericalanddistributeatinterfacesbetweentheCo-cementphaseandWChardphaseor(TiW)Csolidsolution,andinthe(TiW)Csolidsolution.IntheYG8RandYTI4Ralloys,therareearthcompoundisRE2O3withabccstructure,whileintheYT5Ralloy.therareearthcompoundisRE2O2Swithahcpstructure.
简介:InvitedbyInnerMongolianSocietyofRareEarth,Dr.V.D.Kosynkin,directorofRareEarthDepartmentofAllRussiaResearchInstituteofChemi-calTechnology,RussianFederationMinistryforAtomicEnergy,lecturedrareearthcirclesinBaotouMar.5—10,1993.Morethan300rareearthre-searchersandexpertslistenedtothelecturesonthefollowingtopics:GeneralSituationofRareEarthIn-dustryintheCommenwealthofIndependentStates
简介:指导思想与理论依据《英语课程标准》指出:英语课程承担培养学生基本英语素养和发展学生思维能力的任务。语言既是交流的工具,也是思维的工具。学习一门外语能够促进人的心智发展,有助于学生认识世界的多样性,形成社会责任感和创新意识,提高人文素养。英语教育的价值在于促进人的心智发展,塑造健康的品格,培养思维能力。