C_（60）－C_（70）涂层的激光增碳强化效应

研究了Ｃ６０－Ｃ７０涂层对４５＃钢的激光增碳强化机理对强化层组织和性能的分析表明：Ｃ６０－Ｃ７０涂层使４５＃钢产生增碳强化区，得到了近似亚共晶白口铸铁的定向凝固组织，由细小的马氏体［Ｍ］及莱氏体［Ｌｅ］组成，Ｍ中分布着大量微米级的多边形弥散相，并生成了由不同位向的碳化物细针束构成的组织．淬火后达到的平均硬度为ＨＲＣ６３．８，深冷处理后，平均硬度可达ＨＲＣ６５．４     

渗氮与Ni—Cu—P刷镀复合处理表面的摩擦学性能

利用球一盘摩擦磨损试验机研究了办界润油条件下４５＾＃钢渗氮表面刷镀Ｎｉ－Ｃｕ－Ｐ镀层的摩擦学性能,结果表明,在硬度较高且具热硬性的渗氮层上刷镀较软的Ｎｉ－Ｃｕ－Ｐ镀层,可较４５＾＃钢直接刷镀Ｎｉ－Ｃｕ－Ｐ镀层及未刷镀的渗氮层,摩擦学性能全面显著提高,还利用扫;描电子显微镜和铁谱仪对磨损表面的成分、形貌和磨屑形态进行了分析。     

过硫酸钾—脲氧化还原引发的甲基丙烯酸乙酯基三甲基氯化铵反…

研究了以ｓｐａｎ－８０为乳化剂和过硫酸钾－脲引发体系下，甲基丙烯酸乙酯基三甲基氯化铵反相乳液聚合的动力学，得出在「Ｋ２Ｓ２Ｏ８」为１２．３－７３．８μｍｏｌ．Ｌ＾－１．「ＣＯ（ＮＨ２）２」ｏ为０－０．９５ｍｍｏｌＬ＾－１，乳化剂为４１．７５－６６．８０ｇ．Ｌ＾－１范围内的聚合速率表达式：Ｒｐ＾∞「ＤＭ．ＭＣ」＾１．７１「Ｋ２Ｓ２Ｏ８」＾０．２８「ＣＯ（ＮＨ２）２」＾０．０１「３」＾－１．１８，ＢＣ     

PPO作为[PPO—PDMS—PHS]n／PS增容剂的研究

报导了一种新的共混增容体系，以均聚物ＰＰＯ作为相容共混体系「ＰＰＯ－ＰＤＭＳ－ＰＨＳ」ｍ／ＰＳ的增容剂，ＤＳＣ和ＤＭＡ的研究结果表明，ＰＰＯ对「ＰＰＯ－ＰＤＭＳ－ＰＨＳ」ｎ／ＰＳ共混体系确有增容作用，ＰＰＯ的含量在１３．５％以下时，ＰＳ，ＰＰＰＯ「ＰＰＯ－ＰＤＭＳ－ＰＨＳ」ｎ中的硬段相容为一相；     

洛氏及表面洛氏硬度换算经验公式

以《ＧＢ１１７２－７４黑色金属硬度及强度换算值》为依据，根据硬度对照表中的对应数值，推导出ＨＲＣ与ＨＲＡ、ＨＲ１５Ｎ、ＨＲ３０Ｎ、ＨＲ４５Ｎ及ＨＲＢ与ＨＲ１５Ｔ、ＨＲ３０Ｔ、ＨＲ４５Ｔ之间的相互换算的七套硬度换算公式。公式的硬度使用范围包容了标准中的全部梗度数值。换算公式全部采用了一次函数式，计算简便，换算误差小，使用十分方便。     

用Ar气制备C—60的研究

在ｋｒａｔｓｃｈｍｅｒ碳弧法中用Ａｒ代替Ｈｅ制出Ｃ－６０。研究了Ａｒ压力为１．３３－９０．６４ｋＰａ时产的Ｃ－６０碳灰，功率消耗，提取率等的关系，并与用Ｈｅ制Ｃ－６０作了比较。     

SOFC阴极材料（La0.85Sr0.15）（Mn1—7Cry）O3＋δ的非化学整比,晶体结构,电导

研究了掺杂Ｃｒ２Ｏ对（Ｌａ０．８５Ｓｒ０．１５）ＭｎＯ３（以Ｃｒ只好以代Ｍｎ）Ｍｎ＾４＿离子的含量、氧非化学整比、晶体结构、电导率和热膨胀系数的影响。结果表明，随Ｃｒ取代Ｍｎ的摩尔比ｙ增加「Ｍｎ＾４＋」／「Ｍｎ＋Ｃｒ」比率和氧的非化学整比δ减小，而「Ｍｎ＾３＋」比率不变；ＬＳＭＣ的昌体结构仍属菱表六面体，且结构和成分（δ）从室温到１０００℃保持稳定；ＬＳＭＣ的导电激活能增大，但在１０００℃时电导率     

镍钴离子浓度比对化学镀Co—Ni—P合金工艺的影响

讨论了「Ｎｉ＾２＋」／「Ｃｏ＾２＋」的比值、镀液组成和操作条件对化学镀Ｃｏ－Ｎｉ－Ｐ合金沉积速度的影响。「Ｎｉ＾２＋」／「Ｃｏ＾２＋」的比值越大，沉积速度越快。「Ｎｉ＾２＋」／「Ｃｏ＾２＋」的比值对镀液组成和沉积速度之间的关系有明显影响。当镀液的温度和ＰＨ值较低时，「Ｎｉ＾２＋」／「Ｃｏ＾２＋」的比值对沉积速度的影响我小。     

CA—CA2—C2AS—MgO系统中C2AS转为为Q相的研究

本文研究了１３００℃下ＣＡ－ＣＡ２－Ｃ２ＡＳ－ＭｇＯ系统中Ｃ２ＡＳ转化为Ｑ相的条件，结果表明，在ＣＡ－ＣＡ２－Ｃ２ＡＳ－ＭｇＯ系统中的Ｃ２ＡＳ只有补钙的条件下才能转化为Ｑ相，转化后的矿物组成为ＣＡ－Ｃ１２Ａ７－Ｑ－ＭｇＯ。     

钎焊工艺对WC—Co／NiCrBSi复合涂层性能的影响

采用真空钎焊技术,在４５＾＃钢基体表面焊一层（ＷＣ－Ｃｏ／ＮｉＣｒＢＳｉ）复合涂层,研究了不同钎焊工艺对涂层自身结合强度、涂层与基体间连接强度以及涂层抗磨料磨损性能的影响。钎焊工艺为１０８０℃×１０ｍｉｎ时,涂层自身结合强度为１４６ＭＰａ;涂层与基体间的最高连接强度为３６７ＭＰａ。涂层的抗磨料磨损性能比Ｃｏ－Ｃｒ－Ｗ堆焊涂层和（ＷＣ－Ｃｏ／ＮｉｒＢＳｉ）火焰堆焊层的高。     

HDDR工艺条件及均匀化处理对Nd12.6Fe69.3Co11.6 B6.0 Al0.5合金磁性能的影响

研究了HDDR工艺条件(包括HD温度、HD时间、DR温度、DR时间)对Nd12.6Fe69．3Co11.6B6．0Al0．5合金磁性能的影响；比较了均匀化处理和未均匀化处理的合金经HDDR工艺后磁性能的差异；通过对两种舍金原始态的XRD谱线分析，找出存在差异的原因。     

Recommended values for the thermal conductivity of aluminium of different purities in the cryogenic to room temperature range, and a comparison with copper

The thermal conductivity of pure aluminium at cryogenic temperatures varies by many orders of magnitude depending on purity and treatment, and there is little information in the literature on the likely values to be obtained for samples of a given purity. A compilation of measurements from the literature has been assembled and used to provide recommended ranges of values for aluminium of different purities (4N, 5N and 6N) in the normal (non superconducting) state. The number of direct thermal conductivity measurements is too limited to be used alone. Electrical resistivity measurements have thus also been used by converting to thermal conductivity using the Wiedemann-Franz law, which is shown to be valid. Since low temperature measurements can easily be extrapolated to higher temperatures, the results cover the range from 1.2 K (the superconducting transition temperature) to room temperature. Values for 5N purity copper have also been examined in a similar manner, to allow a comparison between the two materials. The main application of these results is in the design of cryogenic thermal links; a discussion of the advantages and disadvantages of both materials for this use is given. The use of silver is also investigated briefly. Trends in the behaviour of the conductivity of aluminium in the superconducting state (to temperatures as low as 50 mK) are also discussed.     

Prediction of Mechanical Properties of Hot Rolled, Low-Carbon Steel Strips Using Artificial Neural Network

Artificial intelligence (AI) has been used in many application areas of engineering. In the present work, an artificial neural network (ANN)-based model is developed to predict the mechanical properties such as yield strength (YS), ultimate tensile strength (UTS), and elongation (EL) of the hot rolled (HR) steel strips/coils. Different network topologies have been investigated to find the appropriate network to simulate the problem. Finally, the best network was chosen as the one with 7-19-3 topology-7 neurons in the input layer, 19 in the hidden layer, and 3 in the output layer. It has been shown that a single network with three output neurons is sufficient to address the problem. The model has been tested with 121 unknown patterns, and the match between the actual values and the simulated ones is found to be very good. The model has been implemented in the hot strip mill (HSM) of Tata Steel, India. This paper describes the methodology adopted to develop the model.     

Study of optical properties and light induced effects on Inq3 thin film used in organic light emitting devices

In this report, the optical properties of tris-(8-hydroxyquinoline) metal complex Inq₃; used as light-emitting layer in electroluminescent (EL) devices are shown. The material has been synthesized and the thin films have been deposited by thermal evaporation on quartz and silicon substrates. The optical constants (n and k) of Inq₃ thin films have been determined using spectroscopic ellipsometry. Light induced effects on optical properties of films have been studied using ellipsometry, photoluminescence and UV–visible transmission measurements. Enhanced photoluminescence intensity with shift in peak position as well as modification in optical constants on light exposure in vacuum indicates phase transformation in Inq₃ films.     

Thermo-hydraulic analysis of the gradual cool-down to 80 K of the ITER toroidal field coil

A time-dependent thermo-hydraulic simulation for an ITER toroidal field (TF) coil gradual cool-down to 80 K has been performed using a new FORTRAN code. The code is based on a 1D helium flow and 1D multi-region solid heat conduction model. The whole TF coil is simulated taking into account thermal conduction between winding pack and case, which are cooled down separately. To limit coil mechanical stresses and coolant pressure drop in the cooling channels, an improved cool-down mode has been developed based on the analysis. Typical and gradual cool-down temperature distributions of TF coil and case are presented. The results indicate that gradual cool-down to 80 K can be achieved in 3 weeks.     

High-pin density feedthrough for superfluid helium applications

A vacuum tight high-pin density feedthrough for use in superfluid helium has been developed. The design and construction based on commercially available Framatome connectors is described.     

Gold and silver nanoparticles surface functionalized with rhenium carbonyl complexes

Gold and silver nanoparticles have been synthesized and stabilized with 3-mercaptopropionic acid (MPA). The resulting MPA capped nanoparticles have been functionalized by attaching rhenium carbonyl species to the MPA carboxylate groups. The whole process have been carried out in a two-step procedure improved from the literature for radiopharmaceutical applications. The resultant rhenium-coated metal (gold or silver) nanoparticles have been studied by a different techniques, as for example X-ray photoelectron spectroscopy, UV–Visible spectroscopy, Z-potential, thermogravimetric analysis and vibrational infrared spectroscopy, which proves that the metal core has been really coated with the rhenium carbonyl species, so X-ray diffraction and transmission electron microscopy have been used to study the structure, size and shape of the obtained nanoparticles.     

（Pb1-xSrx）TiO3系薄膜铁电性能的工艺因素研究

钛酸锶铅((Pb1-xSrx)TiO3)薄膜是一种重要的铁电薄膜,应用潜力很大,是高新技术研究的前沿和热点之一.通过磁控溅射的方法制备了PST薄膜,详细研究了不同工艺因素对PST薄膜铁电性能的影响.结果表明,选择合适的工艺条件可以制备铁电性能优良的钙钛矿相PST薄膜.     

Dynamic simulation of the helium refrigerator/liquefier for LHD

A real-time dynamic simulation has been carried out for the 10 kW class helium refrigerator/liquefier of Large Helical Device (LHD) at National Institute for Fusion Science (NIFS). The refrigerator consists of eight screw compressors, seven expansion turbines, fourteen heat exchangers and a 20 m³ liquid helium reservoir. A simulation model was implemented to Cryogenic Process REal-time SimulaTor (C-PREST), developed as a platform for the plant process study and optimization. Validity of the simulation model has been confirmed based on the design values as well as the results of commissioning tests. This paper describes the cooldown process and expansion turbine trips during the operation. Difficulties of dynamic simulation for the large cryoplant are also discussed.     

Thermal performance of multilayer insulation around a horizontal cylinder

Thermal performance of multiplayer insulation (MLI) is affected by contact pressure between adjacent layers. In order to evaluate the thermal performance of the MLI fabricated in the horizontal cryostats of superconducting magnets, it is important to investigate the contact pressure in the MLI. In case of a horizontal cryostat, the MLI is wound around horizontal cylindrical surface and is compressed at the upper part of the cylinder due to the MLI self-weight. At first, a single thin film wound around the horizontal cylinder was analyzed to evaluate the contact pressure acting on the cylinder. The analysis has been extended to the multiply wound film around horizontal cylinder, in order to investigate the distribution of contact pressure between adjacent layers. By using experimental data obtained with a flat panel calorimeter, the results of this analysis have been applied to evaluate the thermal performance of MLI around a horizontal cylinder. And the non-dimensional contact pressure parameter P^* has been introduced as a useful parameter to evaluate and compare the thermal performance among different kinds of MLI.