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文章编号:1004-0609(2008)10-1819-06 利用FE-SEM分析Al-Si-Mg系和Al-Mg-Si系合金中Mg2Si沉淀相 李建国,谭红艳,史子木,何 迁 (清华大学 材料科学与工程系,北京 100084) 摘 要:以Al-Si-Mg系的A356合金和Al-Mg-Si系的6061合金中的Mg2Si沉淀相为研究对象,通过场发射扫描电子显微镜(FE...沉淀相;FE-SEM;In-lens探头 中图分类号:TG 146.2 文献标识码: A Analysis of Mg2Si precipitates in Al-Si-Mg and Al-Mg-Si alloys by FE-SEM LI Jian-guo, TAN Hong-yan, SHI Zi......
emission-scanning electron microscopy(FE-SEM) technique was employed to observe the shape, size and distribution of AlN+MnS inclusions in oriented electrical steels. Specimens used for FE-SEM observation were deeply electrolytic etched at room temperature in non-aqueous acetylacetone(AA) solution. The results indicate that the FE-SEM technique has obvious advantage in specimen preparation. Therefore......
基于压汞,氮气吸附与FE-SEM的无烟煤微纳米孔特征赵迪斐,郭英海,毛潇潇,卢晨刚,李咪,钱福常摘 要:煤微纳米孔隙结构特征是揭示煤层气体赋存富集机理与扩散运移规律的基础.以阳泉矿区新景矿样品为例,利用氩离子抛光-场发射扫描电镜对纳米级孔隙形貌直观观测,结合低温氮吸附实验,高压压汞实验对微孔隙结构进行定量表征,以研究无烟煤微纳米级孔隙的发育特征.结果表明:煤储层纳米孔广泛发育,形貌特征复杂,类型包括植物细胞结构残余孔,镜质体基质气孔,有机显微组分间孔,黏土矿物孔隙,石英粒内孔,组分间孔,微裂隙等,与微米级孔隙共同构成完整的煤孔隙系统;煤样孔隙主体处于纳米量级,平均孔径约为39.31 nm,80%以上储集空间分布于100 nm以下,集中在1040 nm;纳米孔分形维数介于2.722.90,显示较强的非均......
-SEM). The results represent much closer hardness distribution in the upper and lower plates at the lowest rotational speed. It indicates the Fe-compounds in the fracture surface of the nugget zone... scanning electron microscope (FE-SEM, FEI, Nova NanoSEM 230). Grain sizes of samples were measured by Heyn method. Vickers hardness (HV) of the FSW region was measured on cross-section perpendicular......
microscopy (FE-SEM), and the size distribution of the as-prepared particles was obtained from the image analysis. It was found that the particle size increased with increasing the reactant... at 40 °C for 12 h. The morphologies of the synthesized particles were observed with a field emission scanning electron microscope (FE-SEM, model JSM-6700F). 3 Results and discussion The SEM images......
显微镜(FE-SEM),X射线衍射仪(XRD)和X射线光电子能谱(XPS)对纳米多孔结构进行表征.结果表明:孔径随着氧化电压的升高而增大,且延长氧化时间有利于制备孔径均匀的纳米孔;Ti3SiC2试样经阳极氧化后除含有Ti,Si,C元素外,还含有O元素,且以TiO2的形态存在. 关键词:Ti3SiC2;阳极氧化;纳米孔;电解液;氧化电压 中图分类号:O646  ...孔形貌,尺寸以及组成的影响,并用SEM,XRD和XPS对其进行了表征. 1 实验 1.1 试样的制备与处理 制备Ti3SiC2的原料为以下3种:TiC粉(粒度≤2.6 μm,纯度99.9%,北京兴荣源科技有限公司生产),Ti粉(粒度≤45 μm,纯度99.5%,宝鸡市赛特钛业有限公司生产),Si粉(粒度≤45 μm,纯度99.5%,中钢集团洛阳耐火材料研究院生产).将原料按......
7075-T6铝合金阳极氧化的影响,采用场发射扫描电子显微镜(FE-SEM)对7075-T6铝合金在不添加和添加己二酸铵的硫酸电解液中制备的阳极氧化膜表面的微观形貌进行分析,采用线性阳极极化研究7075-T6铝合金在两种电解液中的极化行为.利用动电位极化技术和电化学阻抗谱(EIS)研究两种电解液中制备的阳极氧化膜的耐腐蚀性能.结果表明:硫酸电解液中添加己二酸铵可以通过降低电流密度来改善氧化膜的结构,减少氧... studied by using field emission scanning electron microscopy (FE-SEM). The anodizing behavior of 7075-T6 aluminum alloy was investigated under linear polarization conditions in sulphuric acid anodizing......
) and field emission scanning electron microscope (FE-SEM) were used to characterize the crystalline structure, chemical valence states and morphology of TiO2 nanoparticles. UV-Vis absorption spectrum... TiO2 nanoparticles were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FE-SEM) and UV-Vis absorption spectrum......
ethylenediaminetetraacetic acid (EDTA) as template. The obtained products were characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), energy dispersive... products were characterized via X-ray powder diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HRTEM), and UV/Vis/NIR......
by filed emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), nitrogen adsorption–desorption isotherm and galvanostatic charge/discharge. The results indicate...) were carried out according to the Barrett–Joyner–Halenda (BJH). Filed emission scanning electron microscope (FE-SEM) (Sirion 200, FEI) and transmission electron microscope (TEM) (JEM-2100F, JEOL) were......