Production of Non-Equilibrium Transition Metal Fine Particles by Mechanical and Chemical Fragmentation

通过机械和化学破碎生产非平衡过渡金属细颗粒

• 批准号: 06452323
• 负责人: SUMIYAMA Kenji
• 金额: $ 4.86万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06452323/
• 关键词: mechanical milling; leaching; ultrasonic fragmentation; nonequilibrium phase; metal particle; magnetism; hydrogel; thermal analysis; 非平衡微粒子; 強磁性体; EXAFS; メカニカル・アロイング; 遷移金属合金; 希土類金属合金

In this project, we tried to produce nonequilibrium metal and compound fine powders using the combined process of mechanical milling and chemical reaction, and observed their structures and magnetic properties. The following is the summary of our experimental results.1) Combined Process of Mechanical Milling and LeachingNonequilibrium precursory particles of Ni-Al, Mn-Al, Ru-Al, Ni-Fe-Al and Cu-Fe-Al were produced using mechanical milling. The main portion of Al was leached out of these milled powders in basic solution. The X-ray diffraction measurements indicate that the nonequilibrium structures, bcc Ni, alpha-Mn, bcc Ru, bcc Ni-Fe and bcc Cu-Fe, retain even after leaching, where Cu-Fe powders are highly oxidized. The DSC traces of these powderes show a exothermic peak owing to nonequilibrium-to equilibrium-phase transformation. Magnetic measurements indicate that bcc Ni and bcc Ru are paramagnetic, while alpha-Mn and bcc Ni-Fe(25at%Fe) are ferromagnetic. These results clearly demons … More trate formation of nonequilibrium phases.2) Enhanced Decomposion of Chemical Solution by Ultrasonic IrradiationPentacarbonyl, Fe(CO)_5 solutions in decane were irradiated using a high-intensity ultrasonic probe and sooty powders were obtained by filtereing and rinsing with dry pentane. The X-ray diffraction experiment show a halo pattern, indicating these powderes are amorphous-like. Magnetization of these powders is one order smaller than that of bulk Fe. This indicates insufficient decomposion of carbonyl solutions, being consistent with presence of C and O detected by the chemical analyzes.3) Homogeneous Complex Formation in Mixed Hydrogel by Mechanical MillingProcesses of complex formation between alumina and titania hydrogels was verified by X-ray diffraction, DSC, NMR and EXAFS.The Knight shift and symmetric to asymmetric change in the of ^<27>Al as well as modification of Ti-K edge EXAFS sepctra clearly demonstratethe chemical bonding, Al-O-Ti is formed during the millig process. Less

在这个项目中，我们试图使用机械铣削和化学反应的合并过程来生产非平衡金属和复合细粉，并观察到它们的结构和磁性。以下是我们实验结果的摘要。1）使用机械铣削产生了Ni-Al，Mn-Al，Ru-Al，Ni-Fe-Al和Cu-Fe-Al的机械铣削和裂解的液化前肌肉颗粒的合并过程。 Al的主要部分被排除在基本溶液中的这些铣削粉末之外。 X射线衍射测量值表明，即使在行走后，Cu-Fe粉末被高度氧化，即使在行走后仍保留了非平衡结构，即BCC Ni，Alpha-Mn，BCC RU，BCC Ni-FE和BCC Cu-Fe。这些粉末的DSC迹线由于非平衡性转化而显示出放热峰。磁性测量表明BCC Ni和BCC RU是顺磁性的，而Alpha-Mn和BCC Ni-Fe（25AT％Fe）是铁磁。这些结果显然是恶魔……更多的非平衡阶段形成。2）通过使用高强度的超声探针和软粉被干燥并用干pentane进行辐射，通过高强度超声探测器和软粉末来辐照脱烷中的超声辐照pentacarbonyl，Fe（CO）_5溶液对化学溶液的分解。 X射线衍射实验显示出光环图案，表明这些粉末类似于无定形。这些粉末的磁化比大量FE小的阶小。这表明羰基溶液的分解不足，与化学分析检测到的C和O的存在一致。3）通过机械磨凝胶在混合水凝胶中的均匀复合物形成的氧化铝和二氧化钛水凝胶之间的复杂形成的机械磨凝胶形成。正如Ti-K边缘EXAFS SEPCTRA的修饰清楚地证明了化学键合，在Millig过程中形成了Al-O-Ti。较少的

项目成果

Y. Kojima: "Comparison of Mechanical Complexation and Themal Behaviour of Metal, Oxide and Hydrogel Mixtures of the Al-Ti-O System," Int. J. Mechanochemistry and Mechanical Alloying. 1. 32-41 (1994)

Y. Kojima：“Al-Ti-O 系统的金属、氧化物和水凝胶混合物的机械络合和热行为的比较”，Int。

K. J. Kim: "Structure and Magnetic Properties of Mechanically Ground ε-Fe_<2.3>N" Jpn. J. Appl. Phys.33. 6539-6541 (1994)

K. J. Kim：“机械研磨 ε-Fe_<2.3>N 的结构和磁性”J. Appl. 33 (1994)。

Y.Kojima, T.Isobe, M.Senna, M.Sherif El-Eskandarany, K.Sumiyama and K.Suzuki: "Comparison of Mechanical Complexation and Thermal Behavior of Metal, Oxide and Hydrogel Mixtures of the Al-Ti-O System" Int. J.Mechanochemistry and Mechnical Alloying. 1. 32-41

Y.Kojima、T.Isobe、M.Senna、M.Sherif El-Eskandarany、K.Sumiyama 和 K.Suzuki：“Al-Ti-O 系统金属、氧化物和水凝胶混合物的机械络合和热行为比较

Y. Kojima: "An NMR Study on the Mechanochemical Interaction between Al and Ti in Metals and Hydrogels," J. Alloys & Compounds. 227. 97-101 (1995)

Y. Kojima：“金属和水凝胶中铝和钛之间机械化学相互作用的核磁共振研究”，J. Alloys

K. J. Kim: "Formation of Nanocrystalline and Amorphous Phases in Cu_<80>P_<20>, Ni_<82>P_<18> and Cu_<87>Ni_<13> Mechanically Alloyed Systems," J. Non-Cryst. Solids. 168. 232-246 (1994)

K. J. Kim：“Cu_<80>P_<20>、Ni_<82>P_<18> 和 Cu_<87>Ni_<13> 机械合金系统中纳米晶相和非晶相的形成”，J. Non-Cryst。