蒋青
纳米材料相变热力学与动力学、界面热力学与动力学、纳米材料电子理论、高熵轻合金。
个性化签名
- 姓名:蒋青
- 目前身份:
- 担任导师情况:
- 学位:
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学术头衔:
博士生导师, 国家杰出青年科学基金获得者, 教育部“新世纪优秀人才支持计划”入选者,
- 职称:-
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学科领域:
材料科学
- 研究兴趣:纳米材料相变热力学与动力学、界面热力学与动力学、纳米材料电子理论、高熵轻合金。
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主页访问
2348
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成果阅读
1212
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成果数
20
【期刊论文】Bi-phase transition diagrams of metallic thin multilayers
蒋青, J.C. Li, W. Liu, Q. Jiang*
Acta Materialia 53(2005)1067~1071,-0001,():
-1年11月30日
Phase transitions of metallic multilayers induced by differences in interface energy are considered thermodynamically, based on a thermodynamic model for interface energy and the Goldschmidt premise for lattice contraction. Bi-phase transition diagrams of Co/Cr, Zr/Nb, Ti/Nb and Ti/Al multilayers are constructed, which are in agreement with experimental results.
Multilayers, Metastable phases, Bi-phase diagram
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蒋青, C.C. Yang, Q. Jiang*
Acta Materialia 53(2005)3305~3311,-0001,():
-1年11月30日
Based on a size-dependent cohesive energy model, the size-dependent critical transition temperatures Tc(D) of ferromagnetic, ferroelectric and superconductive nanocrystals are modeled in a unified form without any adjustable parameter, where D denotes the diameter of nanoparticles and nanowires or the thickness of thin films. In terms of this model, Tc(D) depends on both size and interface conditions. The predicted results are in good agreement with the experimental and other theoretical results for free nanoparticles and nanowires and thin films with different substrate conditions.
Critical temperatures, Nanocrystalline materials, Thermodynamics
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蒋青, Q. JIANG†, H. X. SHI and M. ZHAO
,-0001,():
-1年11月30日
It is demonstrated that a simple model, free of any adjustable parameter, can be developed to predict the free energy of a crystal
Liquids, Superconductors,, metallic,, organic, Thermodynamics, Surfaces &, interfaces
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【期刊论文】Thermodynamic phase stabilities of nanocarbon
蒋青, Q. Jiang*, Z.P. Chen
Carbon 44(2006)79~83,-0001,():
-1年11月30日
Despite the intense interest in nanocarbon for a variety of engineering applications, many details of their relative thermodynamic stabilities remain mysterious. Here, a unified thermodynamic model for the thermodynamic stabilities of nanocarbon in different polymorphs is presented based on energetic contributions of surface energy and surface stress on total Gibbs free energy of systems. Through considering thermodynamically size-dependent phase stabilities among graphite, diamond, fullerenes, and carbon onions, size-temperature phase diagram of nanocarbon is established. The equilibrium temperatures among these phases increase as their sizes decrease. The obtained results are consistent with the available experimental and theoretical results. Moreover, related phase stability of bucky diamond in comparison with above phases are also discussed.
Diamond, Graphite, Fullerenes, Carbon onions, Phase equilibria
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161下载
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【期刊论文】A valence electron concentration criterion for glass-formation ability of metallic liquids
蒋青, Q. Jiang, a) B. Q. Chi, J. C. Li
Appl. Phys. Lett., Vol. 82, No. 18, 5 May 2003, 2984~2986,-0001,():
-1年11月30日
Critical cooling rate of a metallic liquid (Rc) necessary to form glass is correlated to the valence concentration e/a of the liquid (e and a denote valence and atom number in a unit cell, respectively!. Rc of liquid is minimized at e/a53.5. The principles of the composition design to form bulk metallic glasses are as follows: e/a53.5, the component number (n) in the alloy is larger than three, and the component percentage of the ith component (xi) approaches 1/n.
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【期刊论文】Nucleation temperature of elements
蒋青, Q. Jiang, a) X. H. Zhou, and M. Zhao
J. Chem. Phys., Vol. 117, No. 22, 8 December 2002, 10269~10273,-0001,():
-1年11月30日
A general equation, supported by two reasonable asymptotic limits and being free of any adjustable parameters, for the size-dependent and temperature-dependent solid-liquid interface free energy is developed. The prediction of the equation for homogeneous nucleation temperature of metallic elements corresponds well to Turnbull's experiments. Moreover, the heterogeneous nucleation temperatures of Al nanowires and Pb thin films are predicted, which is in agreement with experimental results.
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【期刊论文】Melting thermodynamics of organic nanocrystals
蒋青, Q. Jiang, a) H. X. Shi, and M. Zhao
J. Chem. Phys., Vol. 111, No. 5, 1 August 1999, 2176~2180,-0001,():
-1年11月30日
The size-dependent melting temperature and the size-dependent melting entropy of organic nanocrystals are predicted by use of our simple model being free of any adjustable parameter. The model predictions for the size-dependent melting temperature and the size-dependent melting entropy are supported by the experimental results on benzene, chlorobenzene, heptane, and naphthalene nanocrystals.
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【期刊论文】Size-dependent continuous binary solution phase diagram
蒋青, L H Liang, D Liu and Q Jiang
Nanotechnology 14(2003)438~442,-0001,():
-1年11月30日
Size-dependent solution phase diagrams for binary systems are established based on models of size-dependent melting temperature and melting enthalpy of components and a newly developed model for the size-dependent interaction energy. The results show that as the size of the components decreases, the temperatures of solidus and liquidus curves drop and the two-phase zone becomes small. As the size of the components decreases to a critical size, the two-phase zone deteriorates into a curve where the liquid phase and the solid phase are indistinguishable in structure and thus the phase numbers transform from two to one.
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【期刊论文】Lattice Contraction and Surface Stress of fcc Nanocrystals
蒋青, Q. Jiang, * L. H. Liang, and D. S. Zhao
J. Phys. Chem. B, Vol. 105, No. 27, 2001, 6275~6277,-0001,():
-1年11月30日
General equations for lattice contraction and surface stress of fcc nanocrystals are established based on the Laplace-Young equation and a consideration for the size-dependence of the solid-liquid interface energy. The predictions of our equations are in agreement with the experimental results on the measurement of lattice contraction and surface (interface) stress of nanoparticles and thin films and theoretical calculations.
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104下载
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【期刊论文】Size-Dependent Surface Energies of Nanocrystals
蒋青, H. M. Lu and Q. Jiang*
J. Phys. Chem. B 2004, 108, 5617~5619,-0001,():
-1年11月30日
A model for size-dependent surface energy of nanocrystals, free of any adjustable parameter, has been established based on a previous model for the size-dependent cohesive energy. The surface energy falls as the size of crystals decreases to several nanometers while the surface energy ratio between different facets is size-independent and is equal to the corresponding bulk ratio. The predictions agree with experimental or theoretical results for beryllium, magnesium, sodium, aluminum, and gold.
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