尹爱君
,
李晶
,
李新海
,
黄克雄
,
蒋汉瀛
金属学报
在热力学平衡的基础上，利用描述闪速熔炼中微量元素行为的数学模型，结合闪速熔炼整体平衡计算结果，对Ａｓ，Ｓｂ，Ｂｉ在铜闪速熔炼中的行为进行了计算机模拟．计算结果与文献结果及工业观测数据吻合较好。同时，模拟计算了冰铜品位、氧气浓度、温度及精矿中微量元素含量等因素对微量元素行为的影响．
关键词:
微量元素行为
,
mathematical model
,
computer simulation
,
flash smelting
,
copper metallurgy
,
null
,
null
,
null
林子敬
,
张晓华
无机材料学报
计算机模拟是燃料电池设计的一个重要辅助工具。本文在分析了燃料电池的电学和热学性质之后,设计了一套二维平板型团体氧化物燃料电池(SOFC)的模拟软件,软件能回答诸如温度场分布、电流场分布、输出功率等问题,作为应用例子,该软件被用于分析比较不同气流流向(交叉流、并流、对流)设计的燃料电池工作情况,指出了它们的优缺点,为燃料电池设计提供了有益的信息。
关键词:
燃料电池
,
electrochemistry
,
thermal balance
,
computer simulation
李声慈
,
朱国明
,
康永林
,
吕超
机械工程材料
参考已有的元胞自动机(CA)模型,提出不同的元胞转变规则,建立了基于热激活理论和曲率驱动机制的晶粒长大二维元胞自动机模型,并利用圆形晶粒的收缩过程对模型进行了验证;根据所建模型对晶粒长大过程进行模拟,得到了晶粒显微组织的演变与动力学曲线,分析了晶粒尺寸和晶粒边数的分布规律.结果表明:晶粒长大是大晶粒吞噬小晶粒的过程;晶粒稳定时应当为正六边形,且晶界为直线;晶粒长大指数为0.481,与理论值接近;晶粒尺寸和边数分布具有时间不变性,不同边数的晶粒生长动力学不同;模拟结果与相关理论和文献结论一致.
关键词:
晶粒长大
,
元胞自动机
,
计算机模拟
,
动力学
Y.H. Xia 1)
,
T.P. Lou 1)
,
Z.T. Sui 1) and B. Li 2) 1) School of Material & Metallurgy
,
Northeastern University
,
Shenyang 110006
,
China 2) Jiamusi University
,
Jiamusi 154007
,
China
金属学报(英文版)
The fractal and spinodal decomposition models combined Monte Carlo method were used in computer simulation of phase separation from CaO MgO Fe 2O 3 Al 2O 3 SiO 2 glass. The fractal dimension was applied to quantitative analysis. The mechanism of phase separation was investigated. The results showed that the fractal dimensions and simulated micrographs of phase separation were in good agreement with the experimental results. And the mechanism of phase separation was spinodal decomposition.
关键词:
glass
,
null
,
null
,
null
,
null
,
null
,
null
L. Chen
,
W. Xia and X. J. Chen Department of Materials Science and Engineering
,
Nanchang Institute of Aeronautical Technology
,
Nanchang 330034
,
China
金属学报(英文版)
A computer software to simulate the phase transformation during quenching is designed based on Avrami equation and Scheil additivity principle of incubation period. The isothermal transformation diagrams of supercooled austenite are described by cubic spline functions. This software is possess of a good graphic interface of Windows style, can simulate the whole process in austenite decomposition during continuous cooling. If the cooling rate was given, the fraction of various microstructures transformed of austenite decomposition during continuous cooling at any temperature can be calculated. The simulation results are checked with the quenching experiment of 45 steel. The results indicate that the simulation results are comparatively close to the experimental results.
关键词:
quenching
,
null
,
null
,
null
A. G. Liu
,
X.F. Wang
,
L.P. Wang
,
S. Y. Wang
,
B. Y. Tang and P.K. Chu 1) Advanced Welding Production Technology National Key Laboratory
,
HIT
,
Harbin 150001
,
China 2) Department of Physics and Material Science
,
City University of Hong Kong
,
83 Tat Chee Avenue
,
Kowloon
,
Hong Kang
,
China
金属学报(英文版)
Plasma immersion ion implantation (PIII), unrestricted by sight-light process, is considered a proper method for inner surface strengthening. Two-dimensional simulation oj inner surface PIII process of cylindrical bores were carried out in this paper using cold plasma fluid model, and influence of the bore's dimension on impact energy, retained dose and uniformity of inner surface were investigated.
关键词:
plasma immersion ion implantation
,
null
,
null
,
null
M.D. Starostenkov
,
B. F. Demyanov
,
E.A. Kuklina and E. G. Sverdlova General Physics Department
,
Altai State Technical University
,
Lenin st 46
,
Barnaul
,
656099
,
Russia
金属学报(英文版)
Computer simulation of grain boundaries(GB) was carried out in Fe and ordered alloys NiAl and FeAl with B2 superlattice. In this work symmetrical tilt grain boundaries =5[100](012) and = 5[100](013) are studied. The atomic interaction has been described by Morse empirical central- force potentials.The atomic structure and energy of GB were investigated by means of construction of -surface using full atomic relaxation by method of molecular statics. It is shown that = 5 tilt GBs in Fe, Ni3Al and NiAl have several steady states. Comparison of our results with geometrical model of coincidence site lattice (CSL) was carried out. GBs in model CSL are unstable, the stabilization is achieved by additional displacement at some vector along the plane of defect.
关键词:
grain boundary
,
null
,
null
,
null
,
null
