电子陶瓷材料在多芯片组件(MCM)中的应用

论述了电子陶瓷在多芯片组件（MCM）中的应用、性能要求及优点。重，最叙述低温共烧陶瓷基板技术以及A1N陶瓷基板材料的合成与优异性能。     

工业管道测厚技术在化工厂的应用

本文较为详细地介绍了工业管道的规范化管理及其在化工厂的应用。指出管道定期定点测厚和计算机管理是工业管道规范化管理的重要内容。通过实施这一管理措施可以提高企业的经济效益和社会效益。     

Viscoelastic and Processing Effects on the Fiber-Matrix Interphase Strength. Part I. The Effects of Loading Rate, Test Temperature, Fiber Sizing and Global Strain Level

The effects of loading rate, fiber sizing, test temperature and global strain level on the adhesion strength between carbon fibers and a thermosetting epoxy (Epon 815) are studied using the single fiber fragmentation test procedure. Analytical methodology describing the viscoelastic behavior observed is also presented. The possibility of rate-temperature-interphase thickness superposition for the interfacial strength function is illustrated based on the analytical models discussed. Experimental data are discussed using Weibull statistics and also presented in the form of percent relative frequency histograms for the fiber fragments in a collective fashion. The use of histograms allows for interpretation of the skewness in the data population.     

宽厚板厚度控制模型的优化

宽厚板厚度控制的目的是轧制出板形良好、板凸度小、同板差和异板差尽可能小的产品.莱钢宽厚板生产线自投人生产以来,在板凸度、厚度的均匀性、同板差和异板差等宽厚板厚度控制的瓶颈问题上都难以达到要求.为了实现对轧制厚度的要求,我们在现有的厚度控制模型的基础上,深入理解其控制功能、补偿功能的作用,找到引起厚度难以控制的主要因素,采取轧辊刚度补偿、轧辊偏心补偿、支撑辊油膜厚度补偿、工作辊热膨胀补偿及冲击力补偿等措施来优化厚度控制模型.自优化相应厚度参数和增加相关补偿控制功能以来,宽厚板厚度控制的精度得到很大的提高,具有很高的推广价值.     

胶层厚度对拉伸试样应力分布影响的数值分析

运用弹塑性有限元法研究了胶层厚度对承受拉伸载荷的对接接头胶层内应力分布的影响．三维有限元法数值分析的结果表明，随胶层厚度减小，胶层中正应力SZ与剪应力SYZ的分布趋于均匀；而对正应力SY而言，胶层厚度为0．15mm时，其边缘峰值应力最低。     

平板边界层湍流的数值分析

对于不可压缩平板边界层的时间模式的直接数值模拟（DNS）而言,在转捩后继续计算,就可以得到湍流直接数值模拟结果．分析计算结果发现,当湍流充分发展后,其平均流剖面、各种量的脉动均方根值和雷诺应力等沿平板法向的分布都具有相似性．不过,从转捩完成至湍流充分发展之间有一过渡过程,其间上述相似性不成立．这一结果为简化但又较准确地计算工程技术问题中的湍流提供了一种可能性．此外,还分析了其他一些湍流特征,如形状因子和位移排移厚度随时间的演化规律．为了观察到相干结构,须将展向的计算域缩小一半,以增加分辨率,研究结果表明,湍流边界层近壁区存在相干结构,其主要表现是准流向涡或涡对．     

Effect of Deflected Discs Thickness to the Damping Characteristic of Tube Shock Absorbers

Research is conducted on the relationship between thickness of deflected disc and damping force of tube shock absorbers. By analyzing performing characteristics of the throttling valve using throttling theory of small clearance space and thin place deformation theories, mathematical correlation between disc thickness and magnitude of damping force is formulated. Moreover, a rule concerning change of damping force in terms of disc thickness is concluded.     

Si(111)上生长LiNbO_3薄膜的研究

利用射频磁控溅射的方法,在Si(111)衬底上制备了LiNbO3薄膜。采用X射线衍射(XRD)和扫描电子显微镜(SEM)研究了衬底温度、退火温度和溅射气体压强对LiNbO3薄膜结晶和表面形貌的影响,并用椭圆偏振仪测量了薄膜的厚度和折射率。结果表明:衬底温度为450℃时制备的薄膜,退火前后都没有LiNbO3相生成;衬底温度为500～600℃时,LiNbO3薄膜出现(012)、(104)和(116)面衍射峰,经600℃退火后3个衍射峰的强度加强;衬底温度为600℃时,经600～900℃退火得到的LiNbO3薄膜,除出现(012)、(104)和(116)面衍射峰外,还出现(006)面衍射峰;溅射气体压强从0.8 Pa增大到2.4 Pa时,经800℃退火后得到的LiNbO3薄膜表面晶粒团簇变小,而0.8 Pa制备的薄膜经800℃退火后LiNbO3相的结晶程度较其它压强下完善;900℃退火后得到的LiNbO3薄膜折射率为2.25,与LiNbO3晶体相当。     

Corner forming of AZ61A magnesium alloy tube within warm hydroforming

The corners with small radii on cross sections are crucial for forming hydroformed components with polygonal sections.In this paper,warm hydroforming experiments of AZ61A magnesium alloy tubes were carried out to study the forming regularity of round corners by using a demonstration part with square sections.Effects of temperature on radius forming,thinning ratio distribution and microstructure were revealed and a component with relative outer corner radius of 3.0 was obtained by warm hydroforming at 240℃.The minimum thickness of the formed square section was located in the transition position between the corner and the straight wall.The thinning ratio of the round corner increased with the increase of forming temperature.Formability of the magnesium tube was improved by raising temperature under the effect of dynamic recrystallization at 240℃.     

考虑冷变形加工硬化的翻边力理论计算

在分析现有计算公式存在不足的基础上,根据翻边变形区材料的应力应变特点,考虑了冷变形加工硬化(取幂函数硬化规律)和变形区材料厚度变化(翻边为变薄)两个因素的影响,利用金属塑性成形问题求解理论中的主应力法,推导和提出了圆孔翻边力计算的一个新公式.通过用钢板(SPCC)和铜板(T1)进行了翻边工艺试验的验证,并与经验公式和现有理论公式的计算结果进行了比较,表明新公式计算结果能接近于实际,且原理上更为科学合理.