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

基本信息

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

项目摘要

(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)在快速淬火的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)纳米晶颗粒具有直径为5至10 nm的细晶粒并且是分散的(3)纳米晶颗粒具有富铜成分的亚稳立方结构，为我们揭示了过冷液体中稳定的富铜团簇的形成机制。 (4)两种合金体系中的初次相变过程都得到了阐明，其中形成了另一个亚稳态CuZr相，而Cu-Zr-Ti合金中的纳米晶立方相仍处于淬火状态。然而，Cu-Hf-Ti合金中的玻璃态和亚稳立方相转变为Cu8Hf3相。(5)Cu-Zr-Ti合金中的纳米结构-金属玻璃复合材料表现出高机械强度，初级结晶状态得到改善。这是由于两种不同纳米晶相的形成所致。(6)Zr65Al7.5Cu27.5金属玻璃的初级阶段发现纳米二十面体准晶相的形成，其中二十面体簇在过冷液态下具有较高的稳定性。 (7)研究了纳米二十面体准晶弥散Zr-Pt二元非晶合金的断裂机理。我们发现断裂发生在分散的二十面体颗粒之间的玻璃态区域。（8）在这些研究中，我们可以得出结论，使用稳定的分散器和/或局部结构的基于金属玻璃的纳米级结构控制是非常有效的对提高力学性能以及研究材料的形成机制和转变过程等基本性能非常重要。

项目成果

期刊论文数量（38）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

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。

DOI：
发表时间：
期刊：
影响因子：
0
作者：
通讯作者：

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

DOI：
发表时间：
2003
期刊：
Science and Technology of Advanced Materials 4
影响因子：
0
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.

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。