| M3型硅酸三钙固溶体超晶胞与伪六方亚晶胞之间的取向关系及转换矩阵 | |
| Orientation Relations and Conversion Matrix Between M3 Supercell and Pseudohexagonal Subcell in Tricalcium Silicate Solid Solution | |
| 摘要: 通过透射电子显微镜(TEM)对M3型硅酸三钙(C3S)固溶体进行了研究。基于伪六方亚晶胞(空间群R3m,a=0.705 9 nm,b=0.705 5 nm,c=2.492 4 nm,α=89.79°,β=90.04°,γ=120.14°)对选区电子衍射花样(SAED)和高分辨透射电子显微镜(HRTEM)像进行了分析。结果表明：在M3型硅酸三钙固溶体中,由超结构产生的衍射斑点沿着[117]H*调制波矢量方向,具有一维调制结构特征,并且可以表示为ha*+kb*+lc*+m/[6(-a*+b*+7c*)],其中m=±1、±2和±3。基于M3超晶胞(空间群Cm,a=3.310 8 nm,b=0.703 6 nm,c=1.852 1 nm,β=94.137°)对SAED花样和HRTEM像进行了模拟,最终确立了M3超晶胞和伪六方亚晶胞之间的取向关系,即：(600)M3、(020)M3和(006)M3分别相当于(111)H、(110)H和(117)H,[100]M3//[772]H、[010]M3//[110]H以及[001]M3//[111]H。此外,还确定了M3超晶胞和伪六方亚晶胞之间的转换矩阵。 | |
| 关键词: 硅酸三钙 调制结构 取向关系 透射电子显微术 | |
| 基金项目: 国家重点基础研究发展计划(No.2015CB352106)、江苏省博士后科研资助计划项目(No.1402037B)、国家自然科学基金(No.31570576, 61574034)和江苏高校优势学科建设工程资助。 | |
| Abstract: A M3 modification of tricalcium silicate (C3S) solid solution was investigated using transmission electron microscope (TEM). Selected area electron diffraction (SAED) patterns and high resolution transmission electron microscopy (HRTEM) images were analyzed based on a pseudohexagonal subcell (Space group R3m; a=0.705 9 nm, b=0.705 5 nm, c=2.492 4 nm, α=89.79°, β=90.04°, γ=120.14°). Reflections caused by the superstructure were proven to occur along the modulation wave vector [117]H* with one-dimensional type and could be expressed as ha*+kb*+lc*+m/[6(-a*+b*+7c*)], where m=±1, ±2 and ±3. SAED patterns and HRTEM images based on the M3 supercell (Space group Cm; a=3.310 8 nm, b=0.703 6 nm, c=1.852 1 nm, β=94.137°) were simulated and finally the orientation relations between M3 supercell and pseudohexagonal subcell were established as follows: (600)M3, (020)M3 and (006)M3 were equivalent to (112)H, (110)H and (117)H respectively, and [100]M3//[772]H, [010]M3//[110]H, and [001]M3//[111]H. Furthermore, the conversion matrix between M3 supercell and pseudohexagonal subcell was established. | |
| Keywords: tricalcium silicate modulated structure orientation relations transmission electron microscopy | |
| 投稿时间：2015-09-01 修订日期：2015-10-19 | |
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| 闵辉华,徐峰,吕忆农,杨静,丁林飞,苏凡,朱健民.M3型硅酸三钙固溶体超晶胞与伪六方亚晶胞之间的取向关系及转换矩阵[J].无机化学学报,2016,32(1):145-152. | |
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