Materials Literature
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Safety linings of steel ladles are made of high content alumina castable. In situ observations confirm that during drying a network of macrocracks appears in the monolithic castable lining, owing to both dehydration of the cement paste and temperature. Crack formation kinetics have been characterised over the life of…
(2004). Factors affecting flash weldability in high strength steel – a study on toughness improvement of flash welded joints in high strength steel. Welding International: Vol. 18, No. 6, pp. 436-443.
An adequate ductile fracture locus has to be developed to reasonably model crack initiation and propagation in high velocity impact. Most of the fracture loci in the literature were proposed on the basis of tensile tests while in high velocity impact cracks usually occur in the region where shear and compression are d…
We prepared a large quantity of multiwall nanotubes with intramolecular junctions (CNx/C) by pyrolysis of iron phthalocyanine with or without an inlet of ammonia gas. The nanotubes consist of two sections, one section made of carbon nitride featuring bamboo-like structure and the other one made of carbon featuring emp…
Radioactive58Co and 65Zn were used together to investigate the deposition behavior of cobalt and zinc in the oxide film formed on the stainless steel piping of an apparatus simulating the high temperature and pressure conditions of a boiling water reactor. Using these radioactive tracers allowed the experimental setup…
ABSTRACT The paper explores fatigue at both low and high temperature where creep and environmental damage interact with the normal cyclic processes of crack development. This is achieved by studying two contrasting material systems: the titanium alloys (Ti685, Ti834, Ti6246) and the nickel alloys (Udimet 720Li). Parti…
The corrosion inhibition of mild steel in 3.4% sodium chloride solution containing various concentration of inhibitors such as, ofloxacin, amifloxacin, enofloxacin, pfloxacin, ciprofloxacin and norfloxacin has been investigated. The inhibition efficiency has been evaluated by weight loss and electrochemical polarisati…
Poly(butylcyanoacrylate) nanoparticles were prepared by dispersion polymerization (DP) and emulsion polymerization (EP) of n-butyl cyanoacrylate monomer. The particles were characterized by infrared spectroscopy, differential scanning calorimetry, X-ray diffractometry and transmission electron microscopy. Particle pro…
For the last few years, new alloys are being developed to increase the storage capacity of spent-fuel pools. Boron-strengthened austenitic stainless steel (SS) alloys are now replacing AISI 304 SS (UNS S30400), as their capacity to absorb neutron is higher. The effect of boron on susceptibility to pitting corrosion ha…
In order to enhance the understanding of the redox equilibriums of uranyl ions in molten NaCl-2CsCl eutectic salt UV-Vis absorption spectrophotometry measurements were performed for UO2 2+ in molten NaCl-2CsCl at 923 K under simultaneous electrolytic control of their ratio. A prominent absorption band at 395 nm was as…
Reaction of a solution of the multi-iron polyoxometalate (POM) K 9 [(Fe III (OH 2 ) 2 ) 3 (A-α-PW 9 O 34 ) 2 ] (K 9 1 ) with a colloidal suspension of cationic silica nanoparticles ((Si/AlO 2 )Cl) results in the production of a new heterogeneous oxidation catalyst (K 8 1 /(Si/AlO 2 )). Dynamic light scattering data, c…
In the weld zone and base metal contiguous to the weld zone in flash-butt welded rail, the web of the rail has high tensile residual stresses and the head and base of the rail have compressive residual stresses. The web region is susceptible to failure since most of the weld zone of the rail is coarse grained and has…
Surface-modified hollow-fiber membranes were prepared by radiation-induced grafting of an epoxy-group-containing monomer, glycidylmethacrylate (GMA), onto a polyethylene-based fiber (PE-fiber). The epoxy ring of GMA was opened by introduction of diethylamine (DEA). The bacterial adhesivity to this material (DEA-fiber)…
Abstract The synthesis and full characterization of new chromophores with second order optical nonlinearities containing the 2‐phenyl‐(5,6)‐nitrobenzimidazole group is reported. Starting from 2‐{4‐[(4‐ N , N ‐dihydroxyethylamino)phenylazo]phenyl}‐5(6)‐nitrobenzimidazole, a combined theoretical and experimental approac…
The effect of heat treatment on illite in air at temperatures ranging from 750 to 1150 °C was studied using the Mössbauer effect in 57Fe. The dependence of the Mössbauer parameters and relative percentage of the radiation absorption area was measured as a function of the firing temperature. The onset of thermal struct…
Abstract Polyolefin‐organoclay nanocomposites containing a synthetic tetrasilisic fluoromica were prepared from metallocene‐catalyzed and conventional Ziegler‐Natta‐catalyzed linear low‐density polyethylenes (LLDPE) by means of melt‐compounding. The effects of maleic‐anhydride grafted compatibilizer (PE‐g‐MA) level, c…
Abstract Summary: For the first time, a series of Gd(AA) 3 /NR (natural rubber) composites for X‐ray shielding were prepared by an in situ reaction method. Occurrence of the in situ polymerization of Gd(AA) 3 in composites during vulcanization of NR with peroxide greatly improves the dispersion level of the shielding…
Abstract The products and mechanism of the thermal oxidative degradation of poly(ethylene oxide) at 150 °C have been analysed using 1 H and 13 C 1‐D and 2‐D NMR spectroscopy, including COSY, HMQC, HMBC and DOSY techniques. Peaks from methanoate ester chain ends (in the majority), in‐chain esters, peroxy groups, acetal…
Abstract The EPR parameters anisotropic g ‐factors g x , g y and g z for Cu 2+ ion and hyperfine structure constants A x , A y and A z for 63 Cu 2+ and 65 Cu 2+ isotopes in rutile (TiO 2 ) crystal are calculated by the method of diagonalizing the full Hamiltonian matrix. The crystal‐field parameters contact with the c…
Abstract Because of their superior mechanical and thermal properties, light weight, and favorable cost/performance ratio, nanocomposite materials appear to be suitable replacements for metals and alloys in many industrial applications in fields such as automotive, structural plastics, electronics, packaging, and so on…