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 development of deterministic models for predicting the accumulation of corrosion damage to zirconium and Zircaloys in boiling water reactor coolant environments requires the acquisition of values for various model parameters. In the present work, the point defect model (PDM) was further developed to account for th…
Amorphous manganese oxide/carbon composites were synthesized by directly reducing potassium permanganate with acetylene black (AB) as a cheap reducing agent. A reaction is postulated and confirmed by checking the evolved gas and other species such as and left in the mother liquor. All the composites were characterized…
Shape memory alloys With the shape memory effect, heating reverses prior plastic deformation. Alloys that exhibit this effect are ordered solid solutions that undergo a martensitic transformation on cooling. Shape memory effects were first observed in AuCd in 1932, but it was the discovery by Buehler et al. in of the…
Ru was evaluated as a new underlayer material for depositing ultrathin chemical vapor deposited (CVD) Cu seed layers, and the morphology and adhesion property of CVD Cu films on Ru were compared to that of Ta. CVD Cu films deposited on Ru showed higher nuclei density than Cu films deposited on Ta. Relatively low depos…
Bi 1 − x Sb x nanowires are predicted to show an increased thermoelectric efficiency compared to bulk materials. The authors have synthesized dense Bi0.3Sb0.7 nanowire arrays by electrodeposition into porous anodic alumina and fabricated Ni electrical contacts to the wires. The nanowire/alumina composite was assembled…
The structure and composition of the passive film formed on the super-austenitic AISI 254SMO stainless steel in borate solution were studied using photocurrent spectroscopy coupled with electrochemical measurements. Charge passed calculations suggested that the Cr ( VI ) phase formed in the transpassive region is inso…
The ac conductivities of and 1% Ca-doped have been characterized as a function of oxygen and water vapor partial pressures in the temperature range 300– . Partial conductivities have been determined from the open-circuit voltage of , , and concentration cells. The materials exhibit n- and p-type electronic conductivit…
We report here on the fabrication of porous anodic alumina (PAA) films from commercially available impure aluminum foil. While the expensive ultrapure PAA films are restricted to potential applications in nanoelectrophotonics, the impure PAA films are more suitable for large-scale applications, such as in catalysis an…
Probe-typed carbon nanotube (CNT) point emitter was fabricated by attaching single-walled CNT (SWCNT) and double-walled CNT (DWCNT) bundles onto the atomic force microscope tip using dielectrophoresis method. The field emission current from SWCNT point emitter was 4.9μA at 750V, which is corresponding to the emission…
We present hard-sphere crystallization kinetics for three samples with small differences in polydispersity. We show that an increase in polydispersity of 1% is sufficient to cause dramatic changes in the crystallization kinetics: crystallization is delayed by almost one decade in time and quantitative and qualitative…
Bi 2 Mg 2 ∕ 3 Nb 4 ∕ 3 O 7 (BMN) thin films were deposited on copper clad laminate substrates at temperatures below 150°C for embedded capacitor applications by pulsed laser deposition. The BMN films deposited at temperatures below 150°C showed smooth surface morphologies having root mean square roughness of approxima…
Chronopotentiometry (CP) using 0.1 M KCl as the electrolyte has been most frequently used for selective determination of cuprous and cupric oxides ( Cu 2 O and CuO ) formed on copper surfaces. However, there are conflicting views regarding the order of reduction of the oxides. This study was carried out to settle this…
This paper reports on the electrochemical lithium intercalation/deintercalation of single-crystalline V 2 O 5 nanowires that were synthesized by a two-step approach including a hydrothermal process and a post-calcinating treatment. Techniques of X-ray diffraction, field-effect scanning electron microscopy, transmissio…
By combining two self-organized templates, the authors fabricate hierarchically ordered nanowire arrays on substrates. The nanowire arrays consist of periodic voids at the microscale and hexagonally packed nanowires at the nanoscale. The nanowires are created by selective electrodeposition using nanoporous anodic alum…
The gene Rv1885c from the genome of Mycobacterium tuberculosis H37Rv encodes a monofunctional and secreted chorismate mutase (*MtCM) with a 33-amino-acid cleavable signal sequence; hence, it belongs to the *AroQ class of chorismate mutases. Consistent with the heterologously expressed *MtCM having periplasmic destinat…
Corrosion behavior of hard zinc, Al (Galfan), and Al alloy (Zincalume or Galvalume) coated steels was studied using cyclic voltammetry and potential scan/hold technique in the presence of 0.10- over a pH range of 2 to 12. Influence of chloride concentration and electrolyte pH on pitting potential values of the above t…
-based oxides were studied as a series of new mixed electronic and oxide-ionic conductors for oxygen permeation membrane. High electronic conductivity was observed for the system and the temperature dependence was of metal-like behavior, i.e., it decreased with elevating temperature. The oxygen permeability of -based…
Martensitic transformation and phase instability of Ni8+xMn4Ga4−x high-temperature shape memory alloys have been investigated by first principles calculations using the pseudopotentials plane wave method. The tetragonality (the ratio between the lattice parameter c and a) increases with the increasing of Ni content. T…
We have carried out a systematic investigation of the anodization procedure in order to determine the exact chemical mechanism of the dissolution process responsible for pore formation in nanoporous alumina templates. We measured the anodization current as a function of time and compared it with the thickness of porou…
Deep macropores in n-type Si have been completely filled with copper ͑Cu͒.Homogeneous metal deposition inside the deep pores was achieved by means of electroplating using a solution containing only Cu 2 SO 4 mixed with H 2 SO 4 and no additives.Initial nucleation of the Cu deposition was confined to the bottom of the…