Formation of non-equilibrium phases and associated structural transition in the Pd-Ta system induced by ion beam mixing

被引：1

作者：

Zhao Man ^{[1
]}

Dai Ye ^{[1
]}

Li JiaHao ^{[1
]}

Liu BaiXin ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Mat Sci & Engn, Adv Mat Lab, Beijing 100084, Peoples R China

来源：

SCIENCE CHINA-TECHNOLOGICAL SCIENCES | 2011年 / 54卷 / 03期

基金：

中国国家自然科学基金;

关键词：

amorphous phase; Pd-Ta alloy; ion beam mixing; metastable crystalline phase; fractal; AMORPHOUS ALLOY FORMATION; GLASS-FORMING ABILITY; AMORPHIZATION; IRRADIATION; MULTILAYERS; PREDICTION;

D O I：

10.1007/s11431-010-4286-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

For the Pd-Ta system characterized by a negative heat of formation of -78 kJ/mol, 200 keV xenon ion beam mixing with nano-sized Pd-Ta multilayered films was conducted to study the non-equilibrium phase formation. The results showed that uniform amorphous alloys can be formed within a composition range of 25 at%-78 at% Ta, which falls in the maximum possible amorphization range of 22 at%-80 at% Ta predicted by the empirical model. Moreover, two metastable crystalline phases both of FCC structure, yet with different lattice constants were obtained. Interestingly, a self-assembled fractal pattern was observed in the Pd52Ta48 multilayered films after irradiation to a dose of 1x10(15) Xe+/cm(2) and its dimension was determined to be 1.75 +/- 0.05. The possible mechanisms for the formation of amorphous and metastable crystalline phases as well as for the growth of the fractal pattern were discussed.

引用

页码：676 / 681

页数：6

共 47 条

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ZHAO Man
Science China(Technological Sciences), 2011, (03) : 676 - 681
[2] Formation of non-equilibrium phases and associated structural transition in the Pd-Ta system induced by ion beam mixing
Man Zhao
Ye Dai
JiaHao Li
BaiXin Liu
Science China Technological Sciences, 2011, 54 : 676 - 681
[3] Formation of non-equilibrium phases and associated structural transition in the Pd-Ta system induced by ion beam mixing
ZHAO Man DAI Ye LI JiaHao LIU BaiXin Advanced Materials Laboratory Department of Materials Science and Engineering Tsinghua University Beijing China
Science China(Technological Sciences), 2011, 54 (03) : 676 - 681
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Wang, W. C.
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