Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The mode of fracture and the dictile-to-brittle transition temperature (DBTT) of high purity iron (\gtrsim99.999%) have been investigated with two sets of specimens of different grain boundary character. Wire specimens of 0.4 mm diameter were tested in tension at a strain rate of 8.33×10−5/s.The grain structure of one…
This paper presents the results of experiments on seams sewn under constant sewing conditions when the mechanical properties of the plies are different. By using plies of the same fabric along different directions, the effects of the mean properties of the plies as well as their incompatibility are studied, while the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStabilities of metal complexes of the meso and SS isomers of oxydisuccinic acidRamunas J. Motekaitis and Arthur E. MartellCite this: Inorg. Chem. 1992, 31, 1, 11–15Publication Date (Print):January 1, 1992Publication History Published online1 May 2002Published inissue 1 Janua…
High temperature oxidation tests from 600 to 1400°C were carried out for graphite/B4C/SiC/ZrB2 composite in different atmospheres such as dry air, dry oxygen and moist air with different moisture contents. From weight change, SEM observation, change of surface roughness and X-ray diffraction of the sample before and a…
Corrosion behavior of Ti alloy containing Mo and Pd with high-yield strength were studied in S-containing H2S-CO2-Cl− environment at elevated temperature. Ti alloys showed stress corrosion cracking (SCC) susceptibility in this environment, and the susceptibility largely depended on the yield strength of the alloys. It…
Electrochemical oxygen meters with yttrium-doped thoria, yttrium-stabilized zirconia, and calcium-stabilized zirconia solid electrolytes are tested for the measurement of oxygen activity in Pb-17Li eutectic alloy, the proposed breeder blanket fluid for fusion reactors. The oxygen potentials of the alloy measured by th…
The lubrication characteristics of surface treated rolls of the chromium plated roll, the TiN coated PVD (Physical Vapor Deposition) roll and the VC coated TRD (Thermo-Reactive Deposition) roll are examined by using the simulation testing machine developed by the author. The coefficient of fraction is measured in orde…
Abstract The metal instability of (DMe-DCNQI)2Cu was induced by applying uniaxial stress or coating the crystal with Apiezon L grease. The quadratic temperature dependence of the resistivity gave an indication of the large enhancement of the effective mass of the conduction electrons.
A computer-aided method to improve the thickness uniformity attainable when coating multiple substrates inside a thermal evaporation physical vapor deposition unit is presented. The study is developed for the classical spherical (dome-shaped) calotte and also for a plane sector reversible holder setup. This second arr…
There is considerable interest in the dynamics of topological defects formed during a symmetry breaking phase transition in fields as diverse as condensed matter physics, particle physics and cosmology. Liquid crystals, with their many symmetry breaking phase transitions are ideal materials for such studies. Here we r…
In order to investigate the effect of fibre shape and fibre-assembly structure on FUKURAMI (fullness and softness) of a silk continuous-filament fabric, silk fibres were taken out of the fabric and characterized precisely. The fibre-assembly structure of these silk fibres is discussed in relation to the mechanical pro…
Application of finite‐element modelling of magnetic fields in a linear variable differential transformer (LVDT) is demonstrated and electromagnetics of such devices briefly discussed. A finite‐element aided design of a particular LVDT, built and tested at USITT, Southampton, is used to illustrate practical aspects of…
Electron beam melting is thought to deoxidize and remove inclusions by high-temperature and high-vacuum melting. A rod melting technique using 250 kW EB furnace was applied to stainless steels and resulted in the following:Deoxidation is enhanced by the CO degassing reaction, and the adjustment of feeding material com…
Repetitive interlace patterns are one of the hallmarks of Islamic and Moorish art. Through the study of various collections of such patterns, it is easy to verify that, despite the considerable complexity of the designs, most of the interlaces are formed by strands of a small number of shapes—often just a single shape…
Numerical simulations of penetration processes in HY100 steel plates were performed in this study. The penetrators were made of maraging steel rods and the impact velocity ranges from 78-400 m/s. Experimental evidence shows that the dominant mode of failure in HY100 steel plates is shear induced plugging. By using a m…
The preparation and 63,65Cu NQR resonance frequencies of fourteen three-co-ordinated complex cations of copper(I) with alkylpyridine ligands are reported. Crystal structures of seven of these have also been determined. The complexes show a wide variety of symmetries but in none does the copper atom lie on an ideal thr…
Aluminum foil for high voltage aluminum electrolytic capacitor is etched by D. C. current in the hot chloric solution. The several studies of tunnel growth have ever studied using the hot hydrochloric acid. Effects of sulfuric acid in the hot hydrocloric acid on the tunnel etching of aluminum were studied. The concent…
espanolEl desarrollo de los materiales refractarios basicos ha estado asociado a cambios experimentados en los procesos siderurgicos, particularmente en el area de los convertidores. En el presente trabajo se hace una revision pormenorizada de su evolucion desde los materiales convencionales de dolomia aglomerados con…
ポリ乳酸はいわゆるポリエステルの1種で, 生分解性を持つポリマーである. 本実験では, 数平均分子量6.6×105のポリ乳酸を製膜し, このフィルムに紫外線照射し, 分解挙動を調べた. 紫外線照射開始後の15分経過で分子量は半分にまで下がり, 1時間経つと1/4となった. この低下は紫外光がポリマー鎖をランダムに切断したために起こった. 分解生成物のIR分析は, 空気または窒素気流中いずれの場合の照射でも, 3290cm-1近傍にカルボン酸の水酸基に帰属される吸収の増加を示した. この増加は, 主鎖切断により生成したカルボキシル基末端の生成によるものである. さらに照射時間に対するフィルム重量減少も測定され, 重量減少は, 窒素雰…
Effects of CaO and SiO2 addition on microstructure and intrinsic coercivity (iHc) of sintered Sr-ferrite were investigated. The amount of CaO and SiO2 additives had direct effects upon microstructure and iHc. In CaO addition, remarkable grain growth parallel to the c-plane of Sr-ferrite crystals was observed, resultin…