Materials Literature
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Three in-service leaks on a crude oil pipeline operating in Canada were investigated to identify their metallurgical cause(s). The releases were found to be associated with cracks originating from the internal surface of the pipeline. Further similarities between the releases included: (1) the axial directionality of…
Along with the increasing demand of oil and natural gas by various world economies, the operating pressure of the pipeline is also increasing. Large diameter heavy wall X80 pipeline steel is widely used in the long distance high pressure oil and gas transportation in China today. In addition, development of X90/X100 h…
Abstract Novel conjugated polymers incorporating thieno[3,4-c][1,2,5]thiadiazole (TTD) and 2,1,3-benzothiadiazole (BT) were synthesized. The TTD–BT copolymers displayed broad absorption bands in visible–near-infrared regions with optical band gaps of 1.1–1.2 eV. The HOMO energy levels were lower than those of TTD–olig…
Although composite materials are used to repair and reinforce a variety of anomalies in high pressure transmission gas and liquid pipelines, there continues to be widespread debate regarding what constitutes a long-term composite repair. The United States regulations require that composite repairs must be able to perm…
Abstract not provided
Binary oxides catalyze a large number of interesting reactions, but often the performance is not good enough for commercialization. Attempts have been made to improve the catalytic properties of oxides by replacing some of the cations in the surface or the subsurface layer of the oxide with cations of a different kind…
Potassium (K)-induced structural and electronic modifications in the copper hexadecafluorophthalocyanine (F 16 CuPc) monolayer were investigated by scanning tunneling microscopy and photoemission spectroscopy. The adsorption of K was found to cause a rearrangement of the molecular ordering in the F 16 CuPc monolayer,…
A new method for fabricating CCMPMPs, namely multi-cutter milling, is proposed and the fabrication principle is discussed. Then, a study of three microchannel parameters, the microchannel depth Hc, width Wc, and interval Ws, and two CCMPMP parameters, the porosity P and the total surface area per unit volume SV, is pr…
Waste engine oil (WEO) as an alternative fuel for compression ignition (CI) engine is investigated in this study. WEO was thermally cracked with alumina catalyst in the catalytic fuel reformer (CFR). The gas obtained from the CFR was condensed using a water-cooled condenser for analytical purposes. The output of the c…
We studied the copolymerization of an ionic liquid (1-ethyl-3-vinylimidazolium bis(trifluoromethylsulfonyl)imide ([EVIm][TFSI])) with ethylene glycol diacrylate (EGDA) via initiated chemical vapor deposition to form polymerized ionic liquid (PIL) copolymer films. The copolymerization was carried out by placing droplet…
Using a unique combination of two powerful experimental techniques, x-ray diffuse scattering (XDS) and coherent x-ray scattering (CXS), a heterophase fluctuation has been observed for the first time near the paraelectric to ferroelectric first-order phase transition in the relaxor ferroelectric (1-$x$)Pb(Zn${}_{1/3}$N…
The present work is focused on the investigation of the electrochemical oxidation of BH4 – ions in an alkaline solution on a low-cost ZnCo alloy deposited on the titanium surface. The Co and ZnCo alloy coatings were deposited on the titanium surface via electrodeposition. The morphology, structure and composition of t…
Topological Insulators are in focus of immense research efforts and rapid scientific progress is obtained in that field. Bi2Se3 has proven to be a topological insulator material that provides a large band gap and a band structure with a single Dirac cone at the Γ-point. This makes Bi2Se3 one of the most promising thre…
The effect of unidirectional surface roughness on the corrosion behaviour of nickel in 0.5 M H 2 SO 4 solution was investigated using electrochemical impedance spectroscopy and potentiodynamic polarization techniques. The surfaces, both before and after corrosion, were characterized by scanning electron microscopy, pr…
Current federal regulations in the U.S. require excavation of all dents associated with metal loss due to corrosion identified through in line inspection surveys. Once a dent has been found to be associated with metal loss through excavation, there is little guidance to determine the serviceability of the anomaly. Pas…
InAlN films deposited by plasma-assisted molecular beam epitaxy exhibited a lateral composition modulation characterized by 10–12 nm diameter, honeycomb-shaped, columnar domains with Al-rich cores and In-rich boundaries. To ascertain the effect of this microstructure on its optical properties, room temperature absorpt…
The unique molybdenum-oxide capsule [{(MoVI)MoVI5O21(H2O)6}12{MoV2O4(SO4)}30]72− shows an unprecedented affinity towards Ca2+ cations which interact in fully or partially hydrated forms with different well-defined internal and external receptor areas via direct coordination and/or hydrogen bonds. The cavity of the cap…
Epitaxial ferroelectric thin films of PbTiO3 (PTO) grown on top of nominally La0.7Sr0.3MnO3 (LSMO) submicron hillocks on Nb-doped SrTiO3 (100) substrate were investigated by means of scanning transmission electron microscopy. 180° ferroelectric domains were observed in the c-axis oriented PTO films. The formation and…
One-dimensional silver nanomaterials, nanorods, and nanowires (NWs) were achieved by a solution-phase method. The geometry of the silver nanostructures was successfully tuned by adding polyvinylpyrrolidone (PVP) of different molecular weights. A possible mechanism, involving the suppression effect from PVP on the grow…
A new theory is developed to evaluate longitudinal and transverse impedances of any size of ceramic break that is sandwiched between metal chambers. The theory has been numerically compared with the codes ABCI and CST studio. Excellent agreements are obtained with both codes, in particular with ABCI. The theory succes…