Synthesis, structure and electronic properties of noble quasicrystals under high pressure and temperature

高温高压惰性准晶的合成、结构及电子性质

• 批准号: 17360308
• 负责人: HASEGAWA Masashi
• 金额: $ 10.47万
• 依托单位: Nagoya University (2007)Tohoku University (2005-2006)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17360308/
• 关键词: Quasicrystal・approximant; Complex compound; Super high pressure and temperature; Phase transition; Phase stability; atomic arrangement; Electronic property; Diamond Anvil Cell; ダイアモンドアンビルセル(DAC)

In this research, the LASER-DAC that is the system of the diamond anvil cell combined with the laser heating was used as a very high pressure high temperature synthesis system. First of all, the LASER-DAC system that has used it up to now has been improved. That is, it succeeded in the development of the LASER-DAC system in which the mobile fiber-laser having almost the same wavelength as the YAG and YLF lasers was installed for synthesizing new quasicrystals more easily. In addition, it was also installed instead of the YAG laser of the similar system in the synchrotron radiation facility and made it possible to do in-situ X-ray diffraction measurements under high pressure and temperature. The very high pressure high temperature experiments were tried by using nano polycrystalline diamond anvils that had been developed recently because the expensive natural diamond anvils might become disadvantageous for the new quasicrystal synthesis research under high pressure and temperature. It w … More as found that the mentioned fiber LASER-DAC newly developed in this study was more suitable for heating sample using nano polycrystalline anvils than the previous YAG-LASER-DAC. However, it was also found that very strong diffraction spots from the nano-crystal diamonds was troublesome when the X-ray diffraction experiments. Synthesis of new quasicrystals and relevant compounds and alloys was tried by using the developed fiber LASER-DAC system at high pressure and temperature. It has not arrived to identify new phases by the powder X-ray diffraction measurements and the transmission electron microscope observation although the result with the possibility being synthesized for the material having a new structure was obtained. The phase stability of the compounds and alloys related to quasicrystals was clarified in the cluster level. In addition, phase stability, compression behavior and pressure-induced structural defects were investigated and analyzed by in-situ high pressure powder synchrotron radiation X-ray diffraction measurement at room temperature. Less

在这项研究中，激光加热的系统是非常高的压力温度纤维激光器几乎具有YAG和YLF激光器的开发。 X射线离子测量值和温度很高，使用纳米多晶型铁砧，这些砧座是新的cuasisicrysicrysthl esis esis研究，这些天然钻石砧座不利使用纳米多晶砧座的样品在先前的YAG-LASER-DAC中，但是当X射线衍射实验的合成和相关的CompoAd Compaudons和合金是由发达的Fiber Laser-dac System在高压系统中，X射线衍射实验是麻烦尽管获得了具有新结构的倾斜度，但ALECTRON显微镜观察的温度。在室温下进行测量

项目成果

Effect of lattice preferred orientation on lattice strains in polycrystalline materials deformed under high pressure : Application to hcp-Co

晶格择优取向对高压变形多晶材料晶格应变的影响：在 hcp-Co 中的应用

• 发表时间: 2006
• 期刊: J. Phys. Chem. Solids 67
• 作者: S.Merkel;T.Yagi
• 通讯作者: T.Yagi

Compression behaviour and pressure-induced strain of icosahedral Zn-Mg-Yquasicrystal

二十面体Zn-Mg-Y准晶的压缩行为和压力应变

• 发表时间: 2007
• 期刊: J. Phys. 92
• 作者: M. Hasegawa;A.P.Tsai;T. Yagi;M. Hasegawa
• 通讯作者: M. Hasegawa

X-ray transparent gasket for diamond anvil cell high pressure experiments

用于金刚石砧座高压实验的 X 射线透明垫片

• 发表时间: 2005
• 期刊: Rev.Sci.Instruments 76
• 作者: S. Merkel;T. Yagi;M.Hasegawa;M.Hasegawa;M.Hasegawa;T.Yagi;S.Merkel;S.Merkel;M.Hasegawa;M.Hasegawa;M.Hasegawa;八木 健彦;A.K.Arora;S.Merkel
• 通讯作者: S.Merkel

Pressure stability, compression behavior and pressure-induced disorder of quasicrystals

准晶的压力稳定性、压缩行为和压力引起的紊乱

• 发表时间: 2007
• 作者: S. Merkel;T. Yagi;M.Hasegawa;M.Hasegawa;M.Hasegawa;T.Yagi;S.Merkel;S.Merkel;M.Hasegawa;M.Hasegawa;M.Hasegawa;八木 健彦;A.K.Arora;S.Merkel;M. Hasegawa
• 通讯作者: M. Hasegawa

Preparation and mechanical properties of dispersed-ZrN glassy composite alloys containing pores

• DOI: 10.1016/j.actamat.2006.03.008
• 发表时间: 2006-07
• 期刊: Acta Materialia
• 影响因子: 9.4
• 作者: M. Hasegawa;D. Nagata;T. Wada;A. Inoue