简介：ThehotductilityofFe-36NiinvaralloywithdifferentadditionsoftheelementceriumwasinvestigatedusingaGleeble-3800thermal-mechanicalsimulatoroverthetemperaturerange850-1050℃,andtheimprovementmechanismofthehotductilitywasanalyzedusingacombinationofSEM,EDS,andOM.TheresultsindicatedthatFe-36Niinvaralloyexhibitedpoorhotductilitybelow1050℃,whichwasmainlyattributedtoweakgrainboundariesandtheactionofgrainboundarysliding.However,thealloyswithceriumcontentsof0.016%and0.024%bothdemonstratedsubstantialimprovementinthehotductilityovertheentiretestingtemperaturerange.Theobservedimprovementofthehotductilityofthealloywith0.016%ceriumat950℃andthealloywith0.024%ceriumat900℃wasassociatedmainlywiththegrainboundarystrengtheningandtherestrictionofthegrainboundaryslidingbecausetheadditionofceriumreducedthesegregationofsulfuratgrainboundariesandrefinedthegrainstructure.Theoccurrenceandaccelerationofdynamicrecrystallizationwerefoundtoberesponsibleforthehighhotductilityofthealloywith0.016%ceriumat1000℃andthealloywith0.024%ceriumat950-1000℃asaresultoftherefinementofthegrainstructurebyadditionofcerium.

简介：研究了P507-N235无皂化萃取体系稀土分离系数的变化规律，实验结果表明，P507中加入N235可提高La/Ce分离系数，

简介：氧化镧-氧化铈体系结构及性质研究采用共沉淀法制备了不同镧、铈摩尔配比的混合稀土氧化物La2O3-CeO2,进行了X射线衍射结构分析;采用氢气还原La2O3-CeO2实验,确定了La2O3-Ce2O3稳定存在的成分范围;研究了La2O3-Ce2O3水热法转化氢氧化物的特性。实验结果表明：混合稀土氧化物La2O3-CeO2,当La摩尔配比0.85~0.05范围均以CeO2面心立方结构存在;

简介：8月17～21日，第23届国际稀土永磁会议在美国马里兰安纳波利斯召开，大会为北京大学物理学院杨应昌院士以及来自英国、日本和美国的共4位科学家颁发了杰出成就奖，表彰他们长期以来在探索、开发新型稀土永磁材料方面所作出的卓越贡献。