XU Ji-fang
,
ZHANG Jie-yu
,
JIE Chang
,
TANG Lei
,
CHOU Kuo-chih
钢铁研究学报(英文版)
The densities of the selected quaternary CaO-MgO-Al2O3-SiO2 slag with low silica were measured by the Archimedean method in a wide temperature range from 1773 to 1873 K. Nine different slag compositions were chosen based on three different levels of CaO content and three different levels of SiO2 content. wMgO was equal to 7.0%. wCaO were varied from 40.04% to 50.64%, for wSiO2=10.25%-20.70%. The effects of temperature, SiO2 content and optical basicity were studied. It is shown that density decreases approximately linearly with an increase in temperature. Under the same CaO content, the density decreases with increasing of SiO2 content, and increases with optical basicity increasing. Based on the experimental data as the boundary of the homogenous phase region predicated by FACTSAGE software, the mass triangle model is used to calculate the density of selected limited homogenous phase region. The results showed that the mass triangle model works well.
关键词:
density
,
slag
,
low silica
,
optical basicity
,
model
ZHANG Guo-hua
,
CHOU Kuo-chih
钢铁研究学报(英文版)
The Nernst-Einstein equation is used to calculate the diffusion coefficient of calcium ion in the CaO-Al2O3-SiO2 system based on the data of the density and electrical conductivity. It is assumed that all the aluminium ions form tetrahedral structure and merge with chain or ring in the case of molar concentration of CaO higher than Al2O3. And in this case, calcium ion is assumed to be the conclusive charge carrier. A formula between the diffusion coefficient and concentration of calcium ion as well as temperature is deduced, which gives an increasing function relation between the diffusion coefficient and the concentration of calcium ions.
关键词:
Nernst-Einstein equation
,
diffusion coefficient
,
electrical conductivity
,
Arrhenius law
员江娟
,
陈铮
,
李尚洁
材料导报
双模晶体相场模型是研究复杂晶体结构相变的重要方法.分别介绍了Kuo-An Wu和Greenwood提出的两种双模晶体相场模型,简述了两种模型各自的构造特点:Kuo-An Wu通过在模型中多引入一族倒易矢量来描述复杂晶体结构,Greenwood则通过在自由能函数中引入多峰和构造两点直接相关函数来完成,两者都在模拟三角结构相向正方结构相的转变中得到了广泛应用;进一步指出了Kuo-An Wu模型相转变的影响因素及高斯峰对Green-wood模型相图的影响;最后指明了晶体相场在相变模拟研究中的发展方向.
关键词:
晶体相场模型
,
双模
,
相图
,
相变
Physical Review E
A head-on collision between two solitary waves from opposite directions in a Rayleigh-Benard convecting fluid is investigated by use of the Poincare-Lighthill-Kuo method. The fluid system is bounded below by an isothermic plane and above a free deformable surface on which a heat flux is fixed. The results show that, near the transition of the long-wavelength oscillatory instability, the solitary waves emerging from the collision can preserve their original identities to the second order. The phase shifts due to the collision are calculated explicitly.
关键词:
traveling waves;binary fluid;equation;surface
薛松柏
,
马鑫
,
钱乙余
,
中国稀土学报
采用二元系Miedema生成热模型及其Tanaka过剩熵修正和三元系Chou几何模型, 分析了稀土元素La与Sn-Pb软钎料合金体系中组元元素的相互作用关系. 热力学计算表明, 在Sn-Pb合金体系中, La具有"亲Sn"倾向. 这是添加稀土元素改变Sn-Pb软钎料合金金属学性能的一个基本前提.
关键词:
稀土
,
镧
,
Sn-Pb合金
,
热力学
蔺晓明
,
刘振国
,
卢子兴
复合材料学报
doi:10.3321/j.issn:1000-3851.2006.06.028
在作者已有的内胞模型基础上,结合陈利等的面胞纱线走向及Chou等对表面纤维束截面形状的描述,建立了由面胞和内胞组合的有限元分析模型,比较真实地模拟了三维四向编织复合材料的真实结构.通过有限元计算预测了其弹性性能,并同实验结果进行了比较,分析讨论了三维四向编织复合材料的面胞对整体弹性性能的影响.研究结果证明了面胞在三维四向编织复合材料弹性性能有限元预测中的重要性.
关键词:
复合材料
,
三维编织
,
几何模型
,
弹性性能
