Formation mechanism of self-organized nanostructured -metallic glass composite

自组织纳米结构-金属玻璃复合材料的形成机理

• 批准号: 15510096
• 负责人: SAIDA Junji
• 金额: $ 2.43万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15510096/
• 关键词: metallic glass; nanostructured material; transformation; mechanical properties; local structure; cluster; nano icosahedral quasicrystal; 透過電子顕微鏡; 小角散乱X線回折; 変形

(1)The formation pf nanostructured-metallic glass composite has been found in the rapidly quendied Cu-(Zr or Hf)-Ti alloys.(2)The nanocrystalline particles have a fine grain size of 5 to 10 nm in diameter and are dispersed homogeneously in the glassy matrix.(3)The nanocrystalline particles have a metastable cubic structure with Cu-rich composition, which are brought us the formation mechanism of the stable Cu-rich clusters in the supercooled liquid state.(4)The primary transformation process is clarified in both the alloy systems, where another metastable CuZr phase is formed remaining the nanocrystalline cubic phase in the as-quenched state in the Cu-Zr-Ti alloy. However, the glassy and metastable cubic phases are transformed into the Cu8Hf3 phase in the Cu-Hf-Ti alloy.(5)The high mechanical strength is exhibited in the nanostructured-metallic glass composite in the Cu-Zr-Ti alloy and it is improved in the primary crystallized state. It is due to the formation of two different nanocrystalline phases.(6)Nano icosahedral quasicrystalline phase formation is found in the primary stage in the Zr65Al7.5Cu27.5 metallic glass, where the icosahedral cluster has a high stability in the supercooled liquid state.(7)The fracture mechanism of the nano icosahedral quasicrystal dispersed Zr-Pt binary amorphous alloy is investigated. We have found that the fracture takes place in the glassy region among the dispersed icosahedral particles.(8)In these studies, we can conclude that the nanoscale structure control based on the metallic glasses using the stable duster and/or local structure is very effective on the improvement of mechanical properties as well as is very important on the investigation of fundamental properties such as the formation mechanism and transformation process in the materials.

(1)在快速冷却的Cu-(Zr或Hf)-Ti合金中发现了纳米结构-金属玻璃复合材料的形成。(2)纳米晶颗粒直径为5~10 nm，均匀地分散在玻璃基质中。(3)纳米晶颗粒具有亚稳的立方结构，具有富铜成分，这为我们提供了过冷液态下稳定的富铜团簇的形成机制。(4)两种合金体系中的一次转变过程都得到了明确的解释。在此基础上形成了另一个亚稳的CuZr相，使得该合金中的纳米晶立方相保持在淬火状态。而在Cu-Hf-Ti合金中，玻璃相和亚稳态立方相转变为Cu8Hf3相。(5)纳米结构-金属玻璃复合材料具有较高的机械强度，且在初晶化阶段有所改善。(6)研究了纳米二十面体准晶弥散分布的非晶合金的断裂机制。(6)纳米二十面体准晶存在于非晶合金的初始阶段，二十面体团簇在过冷液相中具有较高的稳定性。在这些研究中，我们可以得出结论，利用稳定的除尘器和/或局部结构来控制金属玻璃的纳米结构对提高材料的力学性能是非常有效的，对于研究材料中的形成机制和转变过程等基本性能也是非常重要的。

项目成果

Influence of hydrostatic pressure during casting on as cast structure and mechanical properties in Zr65Al7.5Ni10Cu17.5-xPdx (x = 0, 17.5) alloys

• DOI: 10.1016/j.scriptamat.2004.08.004
• 发表时间: 2004-11
• 期刊: Scripta Materialia
• 影响因子: 6
• 作者: H. Kato;J. Saida;A. Inoue

J.Saida et al.: "Microstructure of tensile fracture in nanoicosahedral quasicrystal dispersed Zr80Pt20 amorphous alloy"Scripta Materialia. 50. 1297-1301 (2004)

J.Saida 等人：“纳米二十面体准晶分散 Zr80Pt20 非晶合金中拉伸断裂的微观结构”Scripta Materialia。

Nano structure of rapidly quenched Cu-(Zr or Hf)-Ti alloys

快淬Cu-(Zr或Hf)-Ti合金的纳米结构

• 发表时间: 2003
• 期刊: Science and Technology of Advanced Materials 4
• 作者: Kubo;H.;Player;T.N.;Shinoda;S.;Tsukube;H.;Nariai;H.;Takeuchi;T.;Q.Shen;J.Saida et al.
• 通讯作者: J.Saida et al.

Pressure effect on crystallization temperature in Zr70Pd30 metallic glass

• DOI: 10.1063/1.1655684
• 发表时间: 2004-04
• 期刊: Journal of Applied Physics
• 影响因子: 3.2
• 作者: Jianzhong Jiang;S. Jeppesen;J. Saida;C. Lathe

Influence of hydrostatic pressure during casting and Pd content on as-east phase in Zr-Al-Ni-Cu-Pd bulk alloys.

铸造过程中的静水压力和 Pd 含量对 Zr-Al-Ni-Cu-Pd 大体合金中 as-east 相的影响。

• 发表时间: 2004
• 期刊: Appl.Phys.Lett. 85
• 作者: J.Saida et al.;J.Saida et al.;A.Inoue et al.;H.Kato et al.;H.Kato et al.
• 通讯作者: H.Kato et al.