| CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
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The Kinetic Theory of Growth of Zr-Sn Diffusion Layers on Zr55Cu30Al10Ni5 Metallic Glass |
| CHAI Kan1, LIN Tie-Song1, HE Peng1**, SUN Jian-Fei2 |
1State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001
2School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001
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| Cite this article: |
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CHAI Kan, LIN Tie-Song, HE Peng et al 2014 Chin. Phys. Lett. 31 116102 |
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Abstract The growth kinetics of the intermetallic compound layer between molten pure Sn and ZrCu30Al10Ni5 bulk metallic glass (BMG) is mainly controlled by the diffusion mechanism at stage I at which the value of the time exponent is approximately 1/2, also there is unusual or unique stage II whose time exponent of the growth is suppressed to 1/3. It is deduced that phase transition such as nucleation, coalescence occurring in the vicinity of the interface of the diffusion layer within the BMG and the average size growing as one-third power of time, called the Lifshitz–Slezov law. A more elegant means of attack is based upon the Fokker–Planck approach, which permits us to calculate directly the probability of the distribution of steady-state thickness fluctuations. Physical implications of the analytical results also give the one-third power of time of distance scale. The transmission of Sn particles through a disorder system of the BMG, scattered by the local fluctuation levels, is the source of the time exponent from 1/2 to 1/3 as a macroscopic cumulative effect.
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Published: 28 November 2014
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| PACS: |
61.43.Dq
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(Amorphous semiconductors, metals, and alloys)
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63.20.dh
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(Fitted theory)
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64.70.pe
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(Metallic glasses)
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68.35.Fx
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(Diffusion; interface formation)
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68.43.Jk
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(Diffusion of adsorbates, kinetics of coarsening and aggregation)
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