Shape-dependent composition profile in epitaxial alloy quantum dots: A phase-field simulation

被引：14
|
作者：
Liang, X. D. [1 ,2 ]
Ni, Y. [1 ]
He, L. H. [1 ]
机构：
[1] Univ Sci & Technol China, CAS Key Lab Mech Behav & Design Mat, Hefei 230026, Anhui, Peoples R China
[2] Hefei Univ Technol, Sch Civil Engn, Hefei 230009, Anhui, Peoples R China
来源：
COMPUTATIONAL MATERIALS SCIENCE | 2010年 / 48卷 / 04期
关键词：
Alloy quantum dot; Composition segregation; Diffusion; Phase field; FILMS; NANOSTRUCTURES; NANOCRYSTALS; EVOLUTION; SI(001); MODEL;
D O I：
10.1016/j.commatsci.2010.04.005
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A phase-field microelasticity model is developed to probe the interplay between shape and composition profile in epitaxial alloy quantum dots, and special attention is focused on the competition between chemical mixing and strain energies due to lattice mismatch. Our simulation shows that the inhomogeneous stress distribution in the dot drastically depends on the dot shape and thus leads to a nonuniform composition distribution. The stress-driven composition segregation is size-dependent: the larger the height-to-width ratio of the quantum dot, the more nonuniform the stress map and the larger the composition segregation. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：871 / 874
页数：4
相关论文
共 50 条
  • [31] Effects of external magnetic field on the solidification process in Nd-Fe-B alloy: phase-field simulation
    Feng, Z. K.
    Hong, Y.
    Wang, G.
    Wu, X. H.
    Zeng, D. C.
    MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING, 2018, 26 (02)
  • [32] Phase-field simulation for anisotropic dendrite growth in Mg-3wt.%Zn alloy
    Sun, Kaixin
    Chen, Weipeng
    Pei, Jiaqi
    Hou, Hua
    Zhao, Yuhong
    JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T, 2024, 28 : 2855 - 2867
  • [33] Dynamic multiaxial behaviors of 3D shape memory alloy nanowires: A phase-field study
    Dhote, R.
    Behdinan, K.
    Gomez, H.
    MECHANICS OF ADVANCED MATERIALS AND STRUCTURES, 2016, 23 (11) : 1335 - 1342
  • [34] Simulation of liquid channel of Fe-C alloy directional solidification by phase-field method
    Kang Yong-Sheng
    Zhao Yu-Hong
    Hou Hua
    Jin Yu-Chun
    Chen Li-Wen
    ACTA PHYSICA SINICA, 2016, 65 (18)
  • [35] Simulation of Atypical Dendrite Growth in Ni-Cu Binary Alloy with Phase-Field Method
    Xiao, Rongzhen
    Wang, Zhiping
    Zhu, Changsheng
    Feng, Li
    JOURNAL OF COMPUTATIONAL AND THEORETICAL NANOSCIENCE, 2012, 9 (09) : 1495 - 1499
  • [36] Phase-Field Simulation for Non-isothermal Solidification of Al-Cu Binary Alloy
    Liu Guangguang
    Luo Sen
    Wang Zhaohui
    Wang Weiling
    Zhu Miaoyong
    Wang Xiaohua
    MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS, 2019, 22
  • [37] Phase-field numerical simulation of three-dimensional competitive growth of dendrites in a binary alloy
    Feng, Li
    Gao, Ya-long
    Zhu, Chang-sheng
    An, Guo-sheng
    Deng, Xin
    Jia, Bei-bei
    CHINA FOUNDRY, 2018, 15 (01) : 44 - 50
  • [38] Phase-field simulation of magnetic hysteresis and mechanically induced remanent magnetization rotation in Ni-Mn-Ga ferromagnetic shape memory alloy
    Peng, Qi
    Huang, Junjie
    Chen, Mingxiang
    Sun, Qingping
    SCRIPTA MATERIALIA, 2017, 127 : 49 - 53
  • [39] Geometric Phase of Anisotropic Quantum Dots in the Presence of Time-Dependent Magnetic Field
    Yu, Zhao-Xian
    Jiao, Zhi-Yong
    INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS, 2010, 49 (04) : 786 - 790
  • [40] Phase-field simulation of the solidified microstructure in a new commercial 6xxx aluminum alloy ingot supported by experimental measurements
    Wei, Ming
    Zhang, Lijun
    Yang, Mingjun
    Li, Kai
    Liu, Shuhong
    Zhao, Pizhi
    Du, Yong
    INTERNATIONAL JOURNAL OF MATERIALS RESEARCH, 2018, 109 (02) : 91 - 98
12345