Materials Literature
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Different corrosion mechanisms and their extent within a sinter plant gas pipeline were studied. The low temperature-high moisture at the charging side and high temperature-low moisture at the discharging side exist in the main gas pipeline. The waste gas velocity is maximum near charging side and minimum near dischar…
The crystallization behaviors of Zr-Ni-Nb-Cu-Al metallic glasses are greatly influenced by the substitution of Ni for Zr. For the glassy Zr71−xNixNb3Cu16Al10 (x=7, 9, 11 at%) alloys, the onset temperature of crystallization Tx increases from 717 to 748 K with increasing Ni content from 7 at% to 11 at%. The primary cry…
2 2 1) 1 6 m m Zr65Al7.5Ni10Cu17.5 2) 127K
Conspicuous metallic blue of Morpho butterflies is well known and attract interest because it is a brilliant luster of natural beings. The blue is produced by their proteins, which are almost transparent without pigment. The origin of the coloration with high reflectivity (>~60%) is then attributed to an interference…
Fatigue crack growth characteristics were investigated for sintered and thermal-sprayed tungsten carbide with cobalt (WC-Co) cermets. Acoustic emission (AE) techniques were applied to study the crack growth mechanism. The materials used were two types of sintered WC-Co materials, commercially available as G5 and KD20…
Radiation and chemical stabilities of CMPO-functionalised calix[4]arenes, promising ligands for extraction of actinides and lanthanides, were studied both in solution and in the solid state. A comparison of the results showed that the degradation of ligands under radiolytic conditions proceeds indirectly via interacti…
Sea urchin-like nanostructures of ZnO were fabricated on Si (100) by simple oxidation of ZnO films at 600°C consisting of ZnO nanorods. ZnO nanorods having diameter of 40 nm to 80 nm and length of 3 μm to 4 μm as shown by scanning electron microscope (SEM). They are similar in shape with uniform diameter along its ent…
During thixomolding® of Mg alloys, fine grains (size of ∼10 μm) and continuous eutectic compounds are formed along grain boundaries. These compounds are partly responsible for the superior creep strength of Mg alloys. In this study, we investigate the effects of eutectic compounds formed along grain boundaries in thix…
The response of the magnesium alloy, AZ61 to shock loading has been investigated in terms of it's Hugoniot (Equation of State) and variation of shear strength with impact stress. Comparison of the Hugoniot with that of the similar magnesium alloy AZ31 shows very little difference, and hence gives us confidence in our…
We have measured resonant third-order optical nonlinearities of organic nanoparticles. Five kinds of near-infrared dyes, silicon 2,3-naphthalocyanine bis(trihexysiloxide) (dye 1), methylsilicon (IV) phthalocyanine chloride (dye 2), 2,3-naphthalocyanine (dye 3), 2,4-di-3-guaiazulenyl-1,3-dihydroxycyclobutendiyliumdihyd…
The current work focuses on the effect of silica and titania nanotubes and their synthesis conditions on the potential antibacterial activity. Since most investigations are oriented towards carbon nanotubes, we focused on studying the biological activity of oxide nanotubes obtained under different synthesis and differ…
As plans for new U.S. nuclear power plants encounter problems, their proponents seek to shift ever more economic risk to taxpayers who are already staggering under the weight of other federal bailouts.
We present an elaborate electron-spin resonance study of the low-energy dynamics and magnetization in the ordered phase of the frustrated spinel ZnCr2O4. We observe several resonance modes corresponding to different structural domains and found that the number of domains can be easily reduced by field-cooling the samp…
The accurate estimation of reactor physics parameters related to the presence of cruciform absorber blades in boiling water reactors (BWRs) is important for safety assessment and for achieving flexible operation during the cycle. Characteristics that are affected significantly include distributions of the total fissio…
Novel metal mesh hybrid polymer composite bipolar plates for proton exchange membrane fuel cells (PEMFCs) have been prepared via inserting a copper or alumina mesh in polymer composites. The composition of polymer composites consisted of 70 wt% graphite powder and 0–2 wt% modified multi-walled carbon nanotubes (m-MWCN…
In this work, an upconversion luminescence agent, Er 3+ :Y 3 Al 5 O 12 , was synthesized and its absorption and fluorescent spectra was determined. By calculation, the upconversion efficiency of the emission peak at 320 nm was estimated to be about 3.4%. And then, TiO 2 /Er 3+ :Y 3 Al 5 O 12 composite was prepared by…
In the last years new type Cu-Hf-Al ternary alloys were developed with high glass forming ability and ductility. The addition of Al to Cu-Hf alloys results in improvements in glass formation, thermal stability and mechanical properties of these alloys. We have investigated new Cu-based bulk amorphous alloys in Cu-Hf-A…
An innovative heterojunction is fabricated between two sides of a freestanding thin film of HCl-doped polyaniline (PANI) derivative containing azobenzene side-chain, which is synthesized through an N-alkyl-substituted reaction. Of the film, the side with being irradiated by UV light during preparation is represented a…
For atomic-level investigation of plasticity in amorphous metal, instability analysis which can rigorously describe unstable deformation of atomic structures is a key technique. However, the analytical method cannot be applied to large-scale amorphous metal because of the enormously-increasing computational load with…
A method of electrolytic strengthening on the cutting edge of the cutter is studied to prolong the life of the cutter and to improve the cutting stability.The equipment and the manufacturing processes are developed for electrolytic strengthening on the cutting edge of the rotary cutter.High-speed steel tap is taken as…