快凝粉末Al-10Fe-1V-2Si-0.5Re耐热铝合金

研究了用超声雾化法制备的快凝粉末Ａｌ－１０Ｆｅ－１Ｖ－２Ｓｉ－０．５Ｒｅ合金的性能及显微组织。结果表明，合金中弥散相，如α－Ａｌ１２（Ｆｅ．Ｖ）３Ｓｉ相在５００℃仍保持较好的稳定性；合金具有良好的室温和高温性能，其室温抗拉强度为５４７ＭＰａ，延伸率达１１％；合金经过３００℃／１００ｈ热暴露后在３００℃的屈服强度仍达２５０ＭＰａ。     

用于氟化镓铟高数值孔径光纤的氟磷酸盐和氟锆酸盐和氟锆酸盐包 …

为了得到用于１．３μｍ光通讯窗口掺镨化镓铟（ＰＧＩＣＥ）高数值孔光纤，本文报道以ＺｒＦ４－ＢａＦ２－ＬａＦ３－ＡｌＦ３－Ｎａ（Ｌｉ）Ｆ－ＰｂＦ２（ＺＢＬＡＮ（Ｌｉ）Ｐｂ）和ＮａＰＯ３－ＢａＦ２－ＺｎＦ２－ＰｂＦ２（ＦＰＧ）玻璃作为包层材料，研究了芯和包层玻璃在物理性质和化学组分上的匹配性，差热扫描（ＤＳＣ）和电镜（ＳＥＭ）分析表明ＰＧＩＣＺ／ＺＢＬＡＮ（Ｌｉ）Ｐｂ虽在物理性质上匹配，但在化学组分不     

低密阻尼金属/金属复合体材料的组织与性能研究

采用快速凝固／粉末冶金法成功地研制出Ａｌ－７．０９％Ｆｅ－１．３４％Ｍｏ－１．４５％Ｓｉ（ＦＭＳ０７１４）合金及其金属／金属复合体材料ＦＭＳ０７１４／１５％Ａｌ和ＦＭＳ０７１４／１０％（Ｚｎ－３０％Ａｌ）,考察了其组织、拉伸性能、阻尼性能和密度,产散锻铝ＬＤ７ＣＳ合金进行了对比。结果表明：ＦＭＳ０７１４合金本身就具有较好的拉伸与阻尼性能。添加纯Ａｌ和Ｚｎ－３０％Ａｌ合金粉均使其强度下降,而 ＦＭＷ     

STUDY FOR MECHANICAL ALLOYING OF Fe─M BY MOSSBAUER SPECTROSCOPY

将Ｆｅ－Ｍ（Ｍ＝Ｃ５ＳｉＯ２Ａｌ２Ｏ３）混合物在Ａｒ中高能球磨５６ｇ后测量Ｍｏｓｂａｕｅｒ谱，结果表明，（Ｆｅ）２－（ＳｉＯ２）１仍为Ｆｅ和ＳｉＯ２的机械混合物：（Ｆｅ）６－（Ｃ）３已完全合金化，生成两种Ｆｅ３Ｃ；（Ｆｅ）２－（Ａｌ２Ｏ３）１则成为Ｆｅ（７３％），尖晶石型的ＦｅＡｌ２Ｏ４）２２％），ｑｑｎｔＦｅ的团聚族（５％）和Ａｌ２Ｏ３的混合物。     

超负磁致伸缩晶体Sm－Fe、Sm－Dy－Fe和Sm－Dy－Fe－Al的研究

本文研究了轻稀土负磁致伸缩ＳｍＦｅ＿ｘ（１．４０＜ｘ＜１．９４），Ｓｍ＿ｘＤｙ＿（１－ｘ）Ｆｅ＿ｙ（０．８４＜ｘ＜０．９２．１．８０＜ｙ＜１．９０），Ｓｍ＿（０．９０）Ｄｙ＿（０．１０）（Ｆｅ＿（０．９５）Ａｌ＿（０．０５））＿（１．８０）晶体的制备、热处理及磁学性能，发现ＳｍＦｅ＿ｘ合金的λ－ｘ曲线存在两个峰值，峰值的ｘ点随热处理发生的变化有一定的规律性，还比较了热处理前后，Ｓｍ－Ｆｅ、Ｓｍ－Ｄｙ－Ｆｅ和Ｓｍ－Ｄｙ－Ｆｅ－Ａｌ的相组成对性能的影响。热处理用于改善磁致伸缩性能，并且制得了高磁致伸缩性能的ＳｍＦｅ＿２和（Ｓｍ，Ｄｙ）Ｆｅ＿２合金。     

应用量子化学研究Ca_2Fe_（2-x）Al_xO_5的水化活性

用量子化学ＳＣＣ—ＤＶ—Ｘａ方法分析了Ｃａ_２Ｆｅ_（２-ｘ）ＡｌｘＯ_５体系中的Ｃａ_２Ｆｅ_２Ｏ_５（即Ｃ_２Ｆ），Ｃａ_２Ｆｅ_（１．４３）Ａｌ_（０．５７）Ｏ_５和Ｃａ_２Ｆｅ_（１．２８）Ａｌ_（０．７２）Ｏ５．认为它们的水化活性随Ａｌ的增加而提高的原因是：（１）Ａｌ的净电荷比Ｆｅ高，易吸收水分子的孤对电子；（２）Ａｌ-Ｏ键比Ｆｅ-Ｏ键弱，易断裂而容易与水反应．     

Zn_（1－y）Al_yO敏感材料的固溶及导电机制

用化学共沉淀法，经热处理制得Ｚｎ＿（１－ｙ）Ａｌ＿ｙＯ系敏感材料。实验发现，在ｙ＜０．０８区间内，材料的电阻降低幅度较大，当ｙ＞０．０８时，阻值开始随ｙ值增大而上升。ＸＲＤ分析表明Ｚｎ＿（１－ｙ）Ａｌ＿ｙＯ（Ｏ＜ｙ＜０．１）是固溶体，此体系中存在缺陷平衡，并探讨其导电机制。     

亚甲基蓝和Ag^＋在活性炭纤维上的共吸附

研究了水蒸汽活化和化学活化两类活性纤维（ＡＣＦ）对水溶液中单组分亚甲基蓝和Ａｇ（ＮＨ３）＾＋２以及两者共存时的吸附特征，ＡＣＦ对水溶液中亚甲基蓝的吸附量主要取决于其表面积和孔分布，ＡＣＦ对Ａｇ＾＋的还原一吸附能力则主要取决其表面的化学性质，相同条件下，化学活化的ＡＣＦ对银离子的还原吸附量（３００ｍｇ．ｇ＾－１）比水蒸活化的ＡＣＦ的还原－吸附量（１００ｍｇ．ｇ＾－１）高，溶液中亚甲基蓝的存在显著改变     

超负磁致伸缩晶体Sm—Fe,Sm—Dy—Fe和Sm—Dy—Fe—Al的研究

本文研究了轻稀土负磁致伸缩ＳｍＦｅｘ（１．４０≤ｘ≤１．９４），ＳｍｘＤｙ１－ｘＦｅｙ（０．８４≤ｘ≤０．９２，１．８０≤ｙ≤１．９０），Ｓｍ０．９０Ｄｙ０．１０（Ｆｅ０．９５Ａｌ０．０５）１．８０晶体的制备，热处理及磁学性能，发现ＳｍＦｅｘ合金的λ－ｘ曲线存在两个峰值，峰值的ｘ点热处理发生的变化有一定的规律性，还比较了热处理前后，Ｓｍ－Ｆｅ、Ｓｍ－Ｄｙ－Ｆｅ和Ｓｍ－Ｄｙ－Ｆｅ－Ａｌ的相组成对性能     

美国化学文摘CA收录1995年度《功能材料》发表的论文439篇

美国化学文摘ＣＡ收录１９９５年度《功能材料》发表的论文４３９篇美国化学文摘ＣｈｅｍｉｃａｌＡｂｓｔｒａｃｔ（ＣＡ）收录《功能材料》１９９５年第２６卷１～６期发表的论文数如下期次功能材料发表论文数（篇）ＣＡ收录论文数（篇）Ｎｏ．１２１２０Ｎｏ．２２４２...     

Insertion of triangulated surfaces into a meccano tetrahedral discretization by means of mesh refinement and optimization procedures

In this paper, we present a new method for inserting several triangulated surfaces into an existing tetrahedral mesh generated by the meccano method. The result is a conformal mesh where each inserted surface is approximated by a set of faces of the final tetrahedral mesh. First, the tetrahedral mesh is refined around the inserted surfaces to capture their geometric features. Second, each immersed surface is approximated by a set of faces from the tetrahedral mesh. Third, following a novel approach, the nodes of the approximated surfaces are mapped to the corresponding immersed surface. Fourth, we untangle and smooth the mesh by optimizing a regularized shape distortion measure for tetrahedral elements in which we move all the nodes of the mesh, restricting the movement of the edge and surface nodes along the corresponding entity they belong to. The refining process allows approximating the immersed surface for any initial meccano tetrahedral mesh. Moreover, the proposed projection method avoids computational expensive geometric projections. Finally, the applied simultaneous untangling and smoothing process delivers a high‐quality mesh and ensures that the immersed surfaces are interpolated. Several examples are presented to assess the properties of the proposed method.     

From Industry 4.0 to Research 4.0. Development of High Performance Fibers in the Light of Digitization

We associate a variety of innovations with the term ＂Industry 4.0＂. The pioneer of many 4.0 modifications forms the basisfor the trend towards the integrated di...     

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.     

Roman iron and steel: A review

ABSTRACT

The production of ferrous metal increased during the Roman Late Republican period, Principate and Empire. The direct bloomery process was used to extract the metal from its ores using slag-tapping and slag-pit furnaces. The fuel was charcoal and an air blast was introduced by bellows-operated tuyères. Iron formed as a bloom, often as a spongy mass of metal, which contained impurities from the smelting process, including unreacted ore, fuel, slag and fragments from the furnace walls, while the metal was often inhomogeneous with varied carbon contents. Blooms were either smithed directly into bars or ingots or they were broken up, which also allowed the removal of gross impurities and a selection of pieces with similar properties to be made. These could then be forge-welded together and formed into characteristically shaped ingots. Making steel in the furnace seems to have been achieved: it depended on the ore and the furnace and conditions within it. Surface carburization was also carried out. Iron and steel were used extensively in construction and for tools and weapons. Fire welding was often used to add pieces of steel to make the edges of tools and weapons, which could be heat-treated by quenching to harden them.     

Certification Institutions Expected to Update and Transfer Information on Present Standards

Standards are the basis for production enterprises to organize production, ex-factory inspection, trade (delivery) and technical exchanges, product certification, quality arbitration and supervision.……     

Flow calorimeter for enthalpy increment measurements on condensed gases

A flow calorimeter for enthalpy increment measurements on condensed gases is presented. A better knowledge of the properties of the liquefied natural gas is needed, and therefore a liquid loop has been designed for our flow calorimeter. The fluid loop in the calorimeter is designed in order to avoid the two-phase region, since two phases would give compositional disturbances in the measurements. The avoidance of the two-phase region is made possible by increasing the pressure of the test fluid after the measurement section, then heating the fluid at super-critical pressure past the critical point. Finally, the fluid is throttled to the low-pressure gas state at the inlet condition of the compressor that circulates the fluid. To perform the pressure increase, a new cryogenic pump has been designed. To evaluate the new equipment, measurements were taken on liquid ethane over the temperature range 146–256 K at pressure between 0.9 and 5.1 MPa.     

Synthesis of Alumina-Zirconia Nanocomposites by Solgel Process

Al₂O₃-ZrO₂ nanocomposites were developed starting with the solgel process. Composite alumina-zirconia nanopowders were synthesized from metallorganic precursors (Aluminium secondary butoxide and zirconium Iso propoxide) using the solgel process. The parameters affecting the synthesis—solvent, concentration of precursor, R/H ratio (i.e., dilution of water in solvent)—were varied as also the temperature and pH. BET and TEM were used to measure nanosize. Diffuse reflectance spectroscopy and also qualitative optical absorption led to identical particle size estimate. The variation of process parameters was used to study the effect and interdependence of process parameters. Artificial Neural Networks was used to rigorously analyze the process. Although this led to confirmation of interdependence of parameters, the presence of a single overwhelming solvent variable was also established. Then the optimal process was used to synthesize more nanopowder. To produce bulk nanocomposite the nanopowders were sintered by varying the temperature and time period. The sintered lithoids were probed with a vickers hardness tester to measure elastic modulus, hardness, and fracture toughness. The results showed high elastic modulus, modest hardness, and very high fracture toughness.     

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.