A new CDO zeolite precursor(PreCDO)with a Si/Al ratio of 8.7,the lowest among the layered precursors of this channel-based small-pore zeolite reported so far,has been synthesized using tetraethylammonium(TEA^(+))and t...A new CDO zeolite precursor(PreCDO)with a Si/Al ratio of 8.7,the lowest among the layered precursors of this channel-based small-pore zeolite reported so far,has been synthesized using tetraethylammonium(TEA^(+))and tetramethylammonium(TMA^(+))ions in fluoride media.展开更多
研究了合金元素Al对3种不同Al含量的Fe-28Mn-x Al-1C(x=8,10,12)系低密度钢层错能的影响。结果表明,3种实验钢的层错能范围为67.76~90.64 m J/m^2,Al对层错能的影响呈多项式分布。与28Mn-10Al及28Mn-8Al合金相比,28Mn-12Al合金层错能较...研究了合金元素Al对3种不同Al含量的Fe-28Mn-x Al-1C(x=8,10,12)系低密度钢层错能的影响。结果表明,3种实验钢的层错能范围为67.76~90.64 m J/m^2,Al对层错能的影响呈多项式分布。与28Mn-10Al及28Mn-8Al合金相比,28Mn-12Al合金层错能较高,抗拉强度高但伸长率低,在相同变形量下,28Mn-8Al与28Mn-10Al合金均出现了孪晶组织,且28Mn-8Al中孪晶更明显,而28Mn-12Al合金中未发现孪晶。3种合金的变形机制均为平面滑移变形,这归因于Fe-Mn-Al-C系合金中存在的短程有序会导致"滑移面软化现象",使高层错能的28Mn-12Al合金变形机制也为平面滑移。展开更多
基金supported by the National Creative Research Initiative Program(2012R1A3A2048833)through the National Research Foundation of Korea.We thank the KBSI Western Seoul Center for 19F MAS NMR measurements and PAL for synchrotron diffraction beam time.PAL is supported by the MSIP and the POSTECH.
文摘A new CDO zeolite precursor(PreCDO)with a Si/Al ratio of 8.7,the lowest among the layered precursors of this channel-based small-pore zeolite reported so far,has been synthesized using tetraethylammonium(TEA^(+))and tetramethylammonium(TMA^(+))ions in fluoride media.
文摘研究了合金元素Al对3种不同Al含量的Fe-28Mn-x Al-1C(x=8,10,12)系低密度钢层错能的影响。结果表明,3种实验钢的层错能范围为67.76~90.64 m J/m^2,Al对层错能的影响呈多项式分布。与28Mn-10Al及28Mn-8Al合金相比,28Mn-12Al合金层错能较高,抗拉强度高但伸长率低,在相同变形量下,28Mn-8Al与28Mn-10Al合金均出现了孪晶组织,且28Mn-8Al中孪晶更明显,而28Mn-12Al合金中未发现孪晶。3种合金的变形机制均为平面滑移变形,这归因于Fe-Mn-Al-C系合金中存在的短程有序会导致"滑移面软化现象",使高层错能的28Mn-12Al合金变形机制也为平面滑移。
