| 气相急冷制备Fe超微粒子及表征的研究 | |
| 蔡瑜玲 | |
| Subtype | 硕士 |
| Thesis Advisor | 庄育智 |
| 1989 | |
| Degree Grantor | 中国科学院金属研究所 |
| Place of Conferral | 中国科学院金属研究所 |
| Abstract | 本文从三个方面去研究超微粒子，即超微粒子的制备；结构及表面状态的研究；微粒子几何特性的分形表征。首先对ZDG-300型真空镀膜机进行改进，利用气相急，冷沉积制备出超微Fe粉，然后利用X-射线衍射分析了Fe微粒子的组成与晶体结构，用透射电镜观察其形貌及分布，通过LAS3000表面分析系统研究了微粒子的表面结构与化学价态。最后，以分形表征方法研究了微粒子的几何特性，介绍了分形的基本概念、特性及应用范围，概述了分数维的测试原理与具体方法，利用数点法与分割法分别测试了Fe微粉与SiC微粉的分数维。另外，作为分数维测量方法的推广，本文又研究了SiC粉／环氧的复合结构，用分割法测量了其分数维。 |
| Other Abstract | In the present research nanocrystalline particles wee studied in three aspects: the preparation of nanocrystalline partides; the examination of structure and surface features; the fractal characterization of nanocrystalline particles. Fe nanocrystalline particles were processed through vapour quench deposition in improved ZDG-300 vacuum vapour deposition equipment. Their composition, surface and bulk crystal structure, valence state as well as their morphology and distribution were studied by X-ray Diffraction, Transmission Electron Microscopy and Surface Analysis System. The basic fractal concept, fractal properties and its application were introduced. The main principle and specific methods based on the measurement of fractal dimension were described. The geometric properties of particles were studied by fractal characterization. By using the Point-Counting and "Division" Method the fractal dimension of nanocrystalline particles Fe and SiC were measured. In addition, the SiC/EPOXY RESIN compound structure was analysed. Its fractal dimentsin was found by the "Division" method which is of wide potential applicability. |
| Pages | 82 |
| Language | 中文 |
| Document Type | 学位论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/17396 |
| Collection | 中国科学院金属研究所 |
| Recommended Citation GB/T 7714 | 蔡瑜玲. 气相急冷制备Fe超微粒子及表征的研究[D]. 中国科学院金属研究所. 中国科学院金属研究所,1989. |
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