Evaluation of nanoscale inhomogeneity in as-quenched state of Cu–Hf–Ti alloys
Evaluation of nanoscale inhomogeneity in as-quenched state of Cu–Hf–Ti alloys
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Cu-Hf-Ti 合金淬火态纳米级不均匀性的评估
DOI：
10.1557/jmr.2003.0281
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发表时间：
2003
影响因子：
2.7
通讯作者：
M. Onuma
中科院分区：
文献类型：
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作者：
J. Saida;T. Osuna;A. Inoue;M. Onuma
研究了熔纺Cu_60Hf_30Ti_10和Cu_50Hf_40Ti_10合金的显微组织。 Cu_60Hf_30Ti_10 合金的高分辨率透射电子显微镜 (HRTEM) 图像揭示了纳米级不均匀性的存在，这似乎源自纳米晶颗粒。检测到直径约为5 nm的成分偏析，其尺寸与纳米晶颗粒的尺寸一致。熔纺Cu_60Hf_30Ti_10合金的小角X射线散射测量也表明了与纳米晶颗粒尺寸相同的纳米级不均匀性的发展。发现纳米晶颗粒中Cu元素被富集而Hf元素被排斥。由于熔纺Cu_50Hf_40Ti_10合金与熔纺Cu_60Hf_30Ti_10合金的玻璃态区域具有相似的合金成分，在HRTEM图像中具有均匀的玻璃态结构，没有条纹对比度，因此表明过量的Cu导致快速淬火Cu-Hf-Ti合金中晶体结构的纳米级不均匀性。
The microstructure of the melt-spun Cu_60Hf_30Ti_10 and Cu_50Hf_40Ti_10 alloys was investigated. The high-resolution transmission electron microscopy (HRTEM) image in the Cu_60Hf_30Ti_10 alloy reveals the existence of nanoscale inhomogeneity, which appears to originate from nanocrystalline particles. The compositional segregation with a diameter of approximately 5 nm was detected, and its size agrees with the scale of nanocrystalline particle. Small-angle x-ray scattering measurement of the melt-spun Cu_60Hf_30Ti_10 alloy also indicates the development of nanoscale inhomogeneity with the same size as that of nanocrystalline particles. It is found that the Cu element is enriched in and Hf element is rejected from the nanocrystalline particles. Since the melt-spun Cu_50Hf_40Ti_10 alloy, which has a similar alloy composition to that of the glassy region of melt-spun Cu_60Hf_30Ti_10 alloy, has a homogeneous glassy structure without fringe contrast in the HRTEM image, it is suggested that the excess of Cu causes the nanoscale inhomogeneity with crystalline structure in the rapidly quenched Cu–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：
--
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.