用甲酸盐／柠檬酸盐制备（Sr_（1－x）Ca_x）TiO_3微粉的研究

本文采用甲酸盐／柠檬酸盐溶液酒精脱水的方法制备出均匀的、结晶的、立方钙钛矿结构的（Ｓｒ１－ｘＣａｘ）ＴｉＯ３微粉．借助于ＸＲＤ、ＳＥＭ、ＴＥＭ及粒度分析等现代分析手段，研究了粉末的相结构、粒度、组成以及微观形态．研究表明，（Ｓｒ１－ｘＣａｘ）ＴｉＯ３粉末的粒径和组成与溶液的ｐＨ值、焙烧温度、酒精与溶液的比例，以及酒精清洗、干燥步骤等因素有关．此外，还考察了粉末的烧结性能．     

RS／PMAl－Fe－MRE耐热粉末铝合金成形工艺、组织与性能的研究

研究了ＲＳ／ＰＭＡｌ－Ｆｅ－ＭＲＥ耐热铝合金的粉末成形工艺、组织与性能的关系。粉末尺寸越小，组织越细，得到的力学性能越好。随着ＭＲＥ含量的增加，力学性能增加。同尺寸粉末合金，氦气作冷却介质时，其力学性能较氩气作冷却介质的要好。采用本试验粉末合金成形工艺制得的Ａｌ－Ｆｅ－ＭＲＥ粉末耐热铝合金，具有优异的室温及高温力学性能     

高性能通道式电子倍增器

采用化学涂层和焙烧的方法制成了高性能通道式电子倍增器（ＣＥＭ）。测试结果表明工作电压在２５００Ｖ时增益可达１０＾８、暗计数为０ｃ／６０ｓ和脉冲分布为２０－５０％。把它们替代进口的俄歇电子能谱和扫描电子显微镜中的ＣＥＭ部件，能良好工作一年以上，本命同了与其有关的ＡＥＳ图谱和ＳＥＭ照片。结果表明该通道式电子倍增器在性能、质量和价格方面均具有很大的竞争力。     

固体激光染料—掺杂复合薄膜制备及其光谱性质

用ＭＴＥＳ，ＭＴＭＳ和ＴＥＯＳ为共先驱体，采用溶胶－凝胶工艺放置法在载玻片上制备了掺激光染料Ｒｈｏｄａｍｉｎｅ ６Ｇ，Ｐｙｒｉｄｉｎｅ－１，Ｐｙｒｅｎｅ和Ｃｏｕｍａｒｉｎ的有机复合薄膜。观察分析了凝胶形成过程的分相及干燥过程的开裂现象。     

用甲酸盐／柠檬酸盐制备（Sr1—xCax）TiO3微粉的研究

本文采用甲酸盐／柠檬酸盐溶液酒精脱水的方法制备出均匀的、结晶的、立方钙钛矿结构的（Ｓｒ１－ｘＣａｘ）ＴｉＯ３微粉。借助于ＸＲＤ、ＳＥＭ、ＴＥＭ及粒度分析等现代分析手段，研究了粉末的相结构、粒度、组成以及微观形态。研究表明，（Ｓｒ１－ｘＣａｘ）ＴｉＯ３粉末的粒径和组成与溶液的ｐＨ值、熔烧温度、酒精与溶液的比例，以及酒精清洗、干燥步骤等因素有关。此外，还考察了粉末的烧结性能。     

几类重要的反应性高分子应用研究进展

本文主要叙述了ＰＥ－ｇ－ＭＡＨ，ＰＰ－ｇ－ＭＡＨ，ＥＰＤＭ－ｇ－ＭＡＨ，ＰＳ－ｇ－ＧＭＡ，ＳＥＢＳ－ｇ－ＧＭＡ，ＰＰ－ｇ－ＡＡ等几种反应性高分子的制备及应用，研究现状和它们未来发展的趋势。     

热化学气相反应法制备SiC纳米粉的研究

利用ＳｉＨ４－Ｃ２Ｈ４－Ｈ２系统的反应，在１４２３Ｋ￣１６７３Ｋ温度范围内对ＳｉＣ超细粉的合成进行了系统研究。采用的粉末表征方法有透射电镜（ＴＥＭ）、红外吸收谱（ＩＲ）、Ｘ射线衍射（ＸＲＤ）、粉末比表面分析（ＢＥＴ），高分辨透射电镜（ＨＲＥＭ）和化学分析。结果表明，改变反应温度和反应气体组成比能获得高纯ＳｉＣ超细粉。在１４２３Ｋ￣１５７３Ｋ范围内，粉末富硅，当温度超过１６２３Ｋ时粉末富碳，在Ｔ＝１     

纳米晶Ba1—xPbxTiO3的合成与表征

以醋酸铅，硬脂酸钡和钛酸丁酯为原料，用硬脂酸凝胶法（ＳＡＧ）合成了粒度均匀，粒径１０－２０ｎｍ的Ｂａ１－ｘＰｂｘＴｉＯ３纳米晶粉末，利用红外光谱（ＩＲ），热重（ＴＧ）和差热分析（ＤＴＡ）研究了纳米晶粉末的合成过程。用ＴＥＭ，ＸＲＤ观察和研究纳米晶的形貌及晶体结构，并用发射光谱测定样品的纯度。     

IBAD MoS2—Ta复合膜的氧化行为研究

用ＸＰＳ分别检测了在去离子水中浸泡１５８ｈ以及在４３０℃高温加热１ｈ的离子束辅助沉积ＭｏＳ２－Ｔａ复合膜中Ｍｏ与Ｓ元素的电子结构。发现在浸泡和４３０℃高温环境,ＭｏＳ２－Ｔａ复合膜的抗氧化特性远优于同样条件下沉积的纯ＭｏＳ２复合膜。结合ＴＥＭ,ＡＥＳ和ＸＰＳ对ＭｏＳ２－Ｔａ膜的形态,结构,组成以及元素的化学态进行的观察和分析,讨论了这种膜抗氧化性能提高的可能机制。     

聚二甲基硅氧烷／聚氨酯共混体系的增容作用

采用聚二甲基硅氧烷－ｂ－聚乙二醇嵌段共聚物为增容剂，增容聚二甲基硅氧烷／聚氨酯共混体系，重点研究了增容剂的增容效应。结果表明，ＤＭＳ－ｂ－ＯＥ对ＰＤＭＳ／ＰＵ共混体系的增容效果与聚氨酯的化学结构有关；ＤＭＳ－ｂ－ＯＥ对聚二甲基硅氧烷／聚四氢呋聚氨酯共混体系有良好的增容作用使其力学性能有明显的提高。     

The Research of Anti-Wear Properties of Organomolybdenum Compounds in the Engine Oils

A four-ball tester was used to evaluate the anti-wear performance of three kinds of organomolybdemun compounds in the engine oils, i. e., molybdenum dialkyldithiophosphate (MoDDP), molybdenum dialkyldithiocarbamate ( MoDTC), and sulphur and phosphorus freeorganomolybdeum (Molybdate). The results indicate that a low concentration of MoDDP doesn' t improve the anti-wear properties of the commercial engine oils, but a high concentration of MoDDP can obviously improve the anti-wear properties and the load-carrying capacity of the engine oils. MoDTC doesn' t improve the antiwear properties of the engine oils, but worsens the anti-wear properties of the oils. Signifi can timprove ment of frictional and wear characteristics is obtained with Molybdate added in the commercial engine oils and the formulated oils.     

Certification Becomes Important for the I Quality; and Safety Supervision of the Chinese Liquor Sector

The end of 2007, over 200 unit products of more than 80 Chinese firms have passed the quality grade certification for liquor products. These products involve distilled spirits, beer, wine, yellow wine, fruit syrup wine and others, and cover over 80% of the national top-branded liquor products.……     

Deposition and Coating Properties on CVD Tungsten

Surface characterization and microstructure studies are performed on chemical vapor deposited (CVD) tungsten coating. There is about 2 μm thickness diffusion layer of tungsten in the molybdenum substrate. The thermal shock test shows tungsten coating has good adhesion with molybdenum substrate, but the elements of oxygen and carbon in the tungsten coating have the bad affection to the adhesion. The result of high-temperature diffusion experiment is the diffusion rate from molybdenum substrate to tungsten coating is faster.     

Analysis of marine hydrobiont lipid extracts as possible cryoprotective agents

We studied a combined effect of the cryoprotectants both of lipid and carbohydrate origin at the presence of DMSO or without it on cell viability and the RNA synthesis in the embryonic mollusc and echinoderm cell cultures obtained at different developmental stages. Cryoprotective properties of exogenous lipids correlated with their thermotropic behavior. Lipid extracts from marine hydrobiontes, which thermal transitions are characterized by relatively small part of calorimetric thermogram area lying at temperatures above 0 °C (6–18%), were found to possess a considerable cryoprotective activity. The results are discussed in relation to the prediction of the cryoprotective activity of lipid extracts for marine animal cells. In addition, it was found that marine invertebrate cells can be cryopreserved without DMSO at the presence of trehalose and lipid extracts of some marine hydrobiontes.     

Low-Temperature Properties of Silver

Pure silver is used extensively in the preparation of high-temperature superconductor wires, tapes, films, and other configurations in which the silver not only shields the superconducting material from the surrounding materials, but also provides a degree of flexibility and strain relief, as well as stabilization and low-resistance electrical contact. Silver is relatively expensive, but at this stage of superconductor development, its unique combination of properties seems to offer the only reasonable means of achieving usable lengths of conductor. In this role, the low-temperature physical (electrical, thermal, magnetic, optical) and mechanical properties of the silver all become important. Here we present a collection of properties data extracted from the cryogenic literature and, to the extent possible, selected for reliability.     

Early ironwork in Biscay: Survey,excavation, experimentation and materials characterization. An integral study of the mountainside ironworks (ferrerías de monte or “haizeolak”)

ABSTRACT

The production of iron in Biscay (Basque Country, Spain) has been a hallmark of this territory of the North of the Iberian Peninsula throughout its history. The Archaeology team of the Basque Country Mining Museum has spent 13 years, so far, studying the origins of this activity through the evidences left at the old pre-hydraulic iron production workshops known as mountainside ironworks (ferrerías de monte) or haizeolak. It has catalogued 170 archaeometallurgical sites of this type in Biscay, and the archeological excavation of some of them has led to the knowledge of the different stages of the production process that took place in these workshops. The team has also experimentally reproduced the work carried out in a mountainside ironworks from the High Middle Ages, and it has currently started the characterization process of this type of activity through the study of the collected materials.     

Mechanism Study on the Wear of CrAlTiN Coated High-Speed Steel Twist Drills Under Dry Cutting Conditions

As demands about environment protection are growing up, dry cutting technology is getting more and more concerns from all over the world. Main works performed here are study on dry cutting performances and wear mechanisms of M2high-speed steel (HSS) twist drills with CrAlTiN multicomponent coatings, which was deposited using magnetron sputter ion plating system, in drilling 45 and 30CrMnSiA steel, and their comparisons to those in drilling the same steel but using monolayer CrN and commercial TiN coated drills. Drilling performances of drills are evaluated mainly through the measurements of width on outer corner flank land and the cutting forces. Results show that performances of CrAlTiN coated drills are better than those of monolayer CrN and TiN coated drills. In drilling 45 and 30CrMnSiA steel, the average tool life of the CrAlTiN coated drills are 17.2 and 11.8 times higher than those of the uncoated drills. Observing wear of the drill with scanning electronic microscope, results show that there is no crack or spallation of the CrAlTiN coatings in wear zones. Main mechanism of the wear here is adhesion.     

Study on Bond Ability of Arc-Spraying Coatings with Different Surface Pretreatment on Cast-Iron

Arc spraying coatings are widely used in various applications, but uncommon in cast iron substrate. Different surface pretreatment technology is tested on substrates of gray cast iron. Surface roughness and residual stress were measured by TR200 and X-ray diffraction analyzer. Influence of different surface pretreatment methods ( dry blasting and fusebond) on roughness and residual stress was analyzed. The arc-sprayed coatings of wire 3Cr13 (φ2mm) on gray cast iron substrate is studied. The microstructure and interface of bonding layer were observed by SEM. The bond strength was taken by tensile test. Results show that bond strength with grit blasting is higher than fuse-bond; it is feasible to make wire 3Cr13 coating with arc spraying on cast iron substrate roughened by grit blasting.     

Structural Characteristics of TiO2 Ceramic Coating by Micro-Plasma Oxidation

TiO2 ceramic coatings with thickness of 20 μm were formed on the surface of pure titanium by micro-plasma oxidation. Their micro-structures were investigated by by using X-ray diffraction and their surface images were detected by using scan electronic microscope. There were three kinds of TiO2 coatings, pure anatase type TiO2 phase, mixed phases consisted of rutile type TiO2 phase and anatase type TiO2 phase, pure rutile type TiO2 phase. The coating surface with the pure anatase type TiO2 phase is rough, while the coating surface with the pure rutile type TiO2phase is smooth. The upper coating surface with the mixed type TiO2 phases is anatase type TiO2 structure and the subsurface of the TiO2 coating is rutile type TiO2structure.     

Evaluation of fatigue life of steel using steel grain size

The insightful discussion of the relationship between the construction of metallographic and fatigue life and proposition of mathematical relationships describing this relationship was conducted in the paper. This paper presents a method for estimating the fatigue life, based on the construction of the microstructural material taking into account the grain size and the participation of ferrite and pearlite phase.