Application of MO calculation to plasma-enhanced CVD using organosilicon compounds

Ultra water-repellent films for which contact angles of water drops exceed 150° were prepared by microwave plasma-enhanced CVD using two kinds of organosilicon compound and fluoro-alkyl silane (FAS) at low substrate temperature. Hexamethyldisilane (HMDS) and hexamethyldisiloxane (HMDSO) were used as starting materials. Molecular orbital (MO) calculation suggested that HMDS was more easily decomposable than HMDSO. The films prepared with HMDS and FAS had ultra water repellency. On the other hand, water repellency of the films prepared with HMDSO and FAS was similar to that of polytetrafluoroethylene.     

聚乙二醇400单油酸酯的研发及生产

以油酸、聚乙二醇400(PEG400)为原料,对甲苯磺酸为催化剂,酯化合成聚乙二醇400单油酸酯(PEG400MO)。考察了反应溶剂、温度、催化剂用量、溶剂用量、萃取用量等因素对酯化反应的影响,最终确定最佳的反应条件为油酸与PEG400的摩尔比为1:1.2,对甲苯磺酸投料量为油酸质量的10%,环己烷投料量为油酸的10倍体积,在68℃加热回流反应约7 h,反应完全后加入与对甲苯磺酸等摩尔的碳酸氢钠中和,再以油酸1.0倍质量的PEG400分成等量3次萃取,萃取后减压蒸馏除去环己烷,再经过滤得到产品PEG400MO。以研发的工艺进行工业化生产,平均摩尔收率在90%左右,产品各项指标符合标准要求。     

TMN中被管对象与被管资源之间的通信

本文提出了在被管对象和被管资源之间设计一个网关作为二者通信的中介体。并介绍了被管对象与被管资源之间的关系 ,阐述了设计网关的原理和它作为中间媒介与被管对象、被管资源的交互方法。     

Effects of Mo and Al Additions on the Sulfidation Behavior of 310 Stainless Steel

The high-temperature sulfidation behavior of 310stainless steel (310SS) with Mo and Al additions (up to10 at.%) was studied over the temperature range700-900°C in pure-sulfur vapor over the range of 10^-3 to 10^-1 atm. Thecorrosion kinetics followed the parabolic rate law inall cases and the sulfidation rates increased withincreasing temperature and sulfur pressure. Thesulfidation rates decreased with increasing Mo and Al contents and it wasfound that the addition of 10 at.% Mo resulted in themost pronounced reduction among the alloys studied. Thescales formed on 310SS with Mo additions were complex, consisting of an outer layer of ironsulfide (with dissolved Cr), (Fe,Ni)₉S₈, andCr₂S₃/Cr₃S₄(with dissolved Fe), and an inner heterophasic layer ofFe_1-xS,Cr₂S₃/Cr₃S₄,NiCr₂S₄,Fe_1.25Mo₆S_7.7, FeMo₂S₄, andMoS₂. The scales formed on 310SS with Mo andAl additions had a similar mixture as above, except thatAl_0.55Mo₂S₄ was alsoobserved in the inner layer. The formation ofMoS₂ andAl_0.55Mo₂S₄ partly blocked the transport of cations throughthe inner scale, resulting in the reduction of thesulfidation rates compared to 310SS.     

Degradation in tensile and creep properties of 2.25Cr–1Mo steel by long term service in plant

Abstract

Degradation in tensile and creep properties has been investigated for 2·25Cr–1Mo steel, after long term service at 577°C for 1·9 × 10⁵ h. Creep tests were carried out at 550–690°C for up to about 10 000 h for the long term serviced material. The results are compared with those for virgin material tested for up to 100 000 h. The creep rupture time is shorter but creep ductility is larger for the long term serviced material than for the virgin material at high stress and short time conditions. The difference between the two materials becomes decreased with decreasing stress and increasing time. Microstructure evolution during long term service causes a softening and promotes dynamic recovery or recrystallisation during subsequent creep, which accelerates the onset of acceleration creep. This results in a higher minimum creep rate and a shorter rupture time for the long term serviced material than for the virgin material. The deviation from Monkman–Grant relationship is correlated with a decrease in total elongation.     

基于粒子群优化算法的多目标裁剪优化分配的研究

为解决裁剪优化分配问题,根据分床裁剪实际情况,结合订单信息,以用料成本、利用率、分床裁剪时间为目标,建立多目标优化数学模型。最后采用粒子群优化算法对既定模型进行求解,数据测试结果表明,该模型优化效果较好。     

形神理论源自道家考

通过对中国古代形神理论的发展源头进行追溯,可以认为早期道家的“器”与“道”关系论就是形神理论的源头;到了庄子,形神理论在哲学里已趋成熟,并开始了它向人的转化,至此,中国古代形神理论则已经完全形成。     

孙子军事战略思想与散打应战谋略之研究

从孙子兵法与散打实战之共同特征，即施计运谋这一共性出发，对孙子兵法精华战略思想进行探索，期待能对散打教练员、运动员应战谋略理论上的拓展，起到一定的借鉴和参考功效。     

古韵新做的景观策略——万科紫台景观设计

本文通过介绍万科紫台的景观设计理念,提出古韵新做的景观设计策略,从而探讨将中国古典造园手法与西方现代景观设计理念融会贯通的景观策略。     

Investigation of thermal effects on mechanical properties of 9Cr-1Mo to 9Cr-1Mo welded joints for high-temperature applications

Modified 9CR-1MO usage has been highly increased in recent years mainly under high-temperature application. This paper focusses on microstructure without post heat treatment and hardness, stress analysis of weld zone, heat affected zone and parent metal with and without post heat treatment. Here, among many suitable welding processes, we have been chosen Tungsten Inert Gas Welding with an appropriate filler rod ER308L.The post heat treatment is been carried out by an annealing process. The study of microstructure for 9cr-1mo steel mainly describes size and shape of grains by the Scanning Electronic Microscope, micro, and macro structure examination. The tensile and hardness strength of the 9cr-1mo steel has been determined by using suitable equipment throughout the base metal and weld zone. The microstructure is uniform and free from a dendritic pattern, the ductility of material more after annealing and the hardness of material become uniform overall except in HAZ.