Substantial Study of Viscosity in Metallic Supercooled Liquids

金属过冷液体粘度的实质性研究

• 批准号: 13450261
• 负责人: KAWAMURA Yoshihito
• 金额: $ 9.6万
• 依托单位: Kumamoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13450261/
• 关键词: supercooled liquid; viscosity; amorphous alloy; metallic glass; glass transition; 自由体積; 緩和; フラジリテイー; 過冷却; アモルファス合金

(1)Constitutional equations showing the temperature and strain rate dependence on the viscosity were established using a stretched exponential function for supercooled liquids of La_<55>Al_<25>Ni_<20>, Zr_<65>Al_<10>Ni_<10>Cu_<15>, Pd_<40>Ni_<40>P_<20> and Pt_<60>Ni_5P_<25>. The coefficient of the stretched exponential function of the metallic supercooled liquids was in the ranging from 0.82 to 0.90, showing higher uniform structure than polymer supercooled liquids.(2)The fragility of the metallic supercooled liquids was 54,46,35 and 30 for Pd_<40>Ni_<40>P_<20>, Pt_<60>Ni_5P_<25>, La_<55>Al_<25>Ni_<20> and Zr_<65>Al_<10>Ni_<10>Cu_<15>, respectively. The metal-metalloid supercooled liquids of the Pd_<40>Ni_<40>P_<20> and Pt_<60>Ni_5P_<25> exhibited more fragile than the metal-metal supercooled liquids of the La_<55>Al_<25>Ni_<20> and Zr_<65>Al_<10>Ni_<10>Cu_<15>. The metallic supercooled liquids had an intermediate fragility between the strong liquid of SiO2 and the fragile liquid of o-terphenyl.(3)Although the famous Vogel-Fulcher-Tammann relation gave a good description of the metallic supercooled liquid in the neighborhood of the glass transition temperature, sufficient description of the viscosity was not obtained both for supercooled liquid and melt. The equilibrium viscosity over the entire temperature range can be well fitted by the Cohen-Grest free-volume relation.

（1）对La_<55>Al_<25>Ni_<20>，Zr_<65>Al_<10>Ni_<10>Cu_<15>，Pd_<40>Ni_<40>P_<20>和Pt_<60>Ni_5P_的过冷液体，采用拉伸指数函数建立了粘度与温度和应变速率关系的本构方程<25>。金属过冷液体的拉伸指数函数的系数在0.82 ~ 0.90之间，显示出比聚合物过冷液体更高的均匀结构。（2）Pd_<40>Ni_<40>P_<20>、Pt_<60>Ni_5P_<25>、La_<55>Al_<25>Ni_<20>和Zr_<65>Al_<10>Ni_<10>Cu_<15>的金属过冷液体的脆性分别为54、46、35和30。Pd_<40>Ni_<40>P_<20>和Pt_<60>Ni_5P_<25>的金属-类金属过冷液体比La_<55>Al_<25>Ni_<20>和Zr_<65>Al_<10>Ni_<10>Cu_的金属-金属过冷液体更脆<15>。金属过冷液体的脆性介于SiO2的强液体和邻三联苯的脆性液体之间。（3）虽然著名的Vogel-Fulcher-Tammann关系式对金属过冷液体在玻璃化转变温度附近的粘度有很好的描述，但对过冷液体和熔体的粘度却没有得到充分的描述。在整个温度范围内的平衡粘度可以很好地拟合的Cohen-Grest自由体积关系。

项目成果

H.Kato, T.Hirano, A.Inoue, H.S.Chen, Y.Kawamura: "Influence of ZrC Dispersion on Viscous Flow Behavior of the Zr-Al-Ni-Cu Bulk Glassy Alloy"The Proceedings of The Fourth Pacific Rim International Conference on Advanced Materials and Processing (PRICM4). 1

H.Kato, T.Hirano, A.Inoue, H.S.Chen, Y.Kawamura：“ZrC弥散对Zr-Al-Ni-Cu块状玻璃合金粘性流动行为的影响”第四届环太平洋国际会议论文集

Y.Kawamura, T.Nakamura, H.Kato, H.Mano, A.Inoue: "Newtonian and Non-Newtonian Viscosity of Supercooled Liquid in Metallic Glasses"Materials Science and Engineering. A304-306. 674-678 (2001)

Y.Kawamura、T.Nakamura、H.Kato、H.Mano、A.Inoue：“金属玻璃中过冷液体的牛顿和非牛顿粘度”材料科学与工程。

Y.Kawamura, Y.Ohno: "Successful Electron-Beam Welding of Bulk Metallic Glass"Materials Transactions. 42. 2476-2478 (2001)

Y.Kawamura、Y.Ohno：“大块金属玻璃的成功电子束焊接”材料交易。

河村能人, 井上明久, 増本健, 上原武雄, 垣内久嗣: "高速超塑性を利用した金属ガラスの粉末固化・鍛造加工技術の開発とゴルフクラブへの応用"まてりあ. 40. 280-282 (2001)

Yoshito Kawamura、Akihisa Inoue、Ken Masumoto、Takeo Uehara、Hisatsugu Kakiuchi：“利用高速超塑性的金属玻璃粉末凝固和锻造加工技术的开发及其在高尔夫球杆中的应用” Materia 40. 280-282 (2001)。

T.Itoi, T.Takamizawa, Y.Kawamura, A.Inoue: "Fabrication of Co_<40>Fe_<22>Nb_8B_<30> Bulk Metallic Glasses by Consolidation of Gas-Atomized Powders and their Soft-Magnetic Properties"Scripta Materialia. 45. 1131-1137 (2001)

T.Itoi、T.Takamizawa、Y.Kawamura、A.Inoue：“通过气雾化粉末固结及其软磁性能制备 Co_<40>Fe_<22>Nb_8B_<30> 块状金属玻璃”Scripta Materialia