非平面对称磁场的空间展开及样条函数表述

为了研究带电粒子光学系统的光学特性,需要知道系统中磁场的空间分布。实际磁场往往不具有严格的平面对称性质,一些作者曾就这类磁场的空间展开做过不少工作。但他们的工作是在柱坐标系统中进行的,适用于诸如回旋加速器、双向聚焦磁分析器、环形磁β谱仪等一类装置的磁场分析。对于大型同位素电磁分离器(calutron)那样一类装置,其磁场分布需要     

柱形颗粒群直径分布的激光衍射测量技术

提出了用激光衍射功率谱方法测量柱形颗粒群直径分布的技术方法，解决了长颗粒随机排列时的功率谱探测，及数据快速优化方法等技术难题。此技术已地应用于由羊毛和化纤截成的柱形颗粒群直径分布的测量，实现结果证明了此技术的可行性和实用性。     

固体推进剂中有关粒度分布的数学处理

介绍了固体推进剂中有关颗粒度分布的数学处理方法，用几种数据统计分析的理论分布函数－正态分布，对数－正态分布，Ｋ分布，并以铝粉和含铝推进剂燃烧残渣的颗粒分布为例进行了分析，根据Ｃｕｌｉｃｋ微粒阻尼的理论计算模型，讨论了粒度分析在阻尼效应计算中的应用。     

二钼酸铵(ADM)非团聚晶体的生成试验

探讨了二钼酸铵非团聚晶体生成的机理及制取新工艺。采取该工艺制取的ADM费氏粒度（Fsss)约30μm，激光粒度分布d0.5为370μm，松装比达1.37/cm^3。     

基本粒子简介

介绍了基本粒子的结构和模型，指出了人类对微观世界的认识是无穷无尽的，近代天文观测已证实了宇宙往大、往小都是不可穷尽的。     

高压水射流粉碎原盐

高压水射流粉碎技术是近年发展起来的一项新型粉碎技术。文中介绍了水射流粉碎机理和新研制的后混合靶式水射流粉碎装置 ,并通过原盐粉碎实验证明 ,水射流粉碎具有效率高、工艺简单、产品粒度可调等特点 ,是一项具有良好发展前景的粉碎技术。     

Pad effects on material-removal rate in chemical-mechanical planarization

The role of a porous pad in controlling material-removal rate (MRR) during the chemical-mechanical planarization (CMP) process has been studied numerically. The numerical results are used to develop a phenomenological model that correlates the forces on each individual abrasive particle to the applied nominal pressure. The model provides a physical explanation for the experimentally observed domains of pressure-dependent MRR, where the pad deformation controls the load sharing between active-abrasive particles and direct pad-wafer contact. The predicted correlations between MRR and slurry characteristics, i.e., particle size and concentration, are in agreement with experimentally measured trends reported by Ouma¹ and Izumitani.²     

纳米氧化铝的制备及应用

介绍了高科技产品纳米氧化铝的 3大制备方法 :固相法、气相法、液相法的优缺点 ,以及纳米氧化铝的应用与发展前景     

纳米Fe/C复合材料的原位合成

在石油渣油中加入二茂铁，通过热缩聚反的位合成纳米级铁粒子均匀分散于炭基体中的新型复合材料，研究了在420℃热缩聚时停时间和二茂铁添加量对Fe/C形成的影响，并用TEM和XRD观测和分析了Fe/C的形态和结构，结果表明，在基体中铁粒子的粒径为25－50nm，在一定条件下，二茂铁添加量的增加和停留时间的延长均使Fe/C产率提高，停留时间对热缩聚反应的影响遵循一级反应动力学，二茂铁的添加能显著提高反应速率常数k值。     

Mechanical and thermal properties of HVOF sprayed Ni based alloys with carbide

The objective of the present study is to develop multi-functioned coating to the components, which are made of copper with electroplated Ni and are widely used for steel making industry. In this paper, we report the mechanical and thermal properties of Ni based superalloys with carbide sprayed by high velocity oxygen fuel (HVOF), and the detailed effects of sprayed material, spraying conditions, and initial powder structure on these properties. It was found that, among commercial Ni self-fluxing alloys (without fusing treatment), coating with a carbon content of 0.58 mass% had the most preferable properties, with a good balance of the hardness, strength, and thermal shock resistance. The thermal shock resistance depended not only on the strength of the coating but also on the volume contraction when tested at high temperatures. For the several developed Ni based superalloys with carbide, Ni20Cr8Mo5Fe–WC and Ni16Cr15Mo3–WC demonstrated the prominent adhesion strength and thermal shock resistance with high Galvanic corrosion resistance through optimized spraying condition. Also, 20 mass% NiCr–Cr₃C₂ coating sprayed by using employed relatively small primary particle succeeded in achieving the multi-superior properties; high adhesion strength, high corrosion resistance and thermal shock resistance.