Materials Literature
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Abstract Over several decades, many thousand of tons of the copper-nickel alloy UNS C70600 have been used as a seawater piping material in marine engineering. In order to provide reliable service performance of the material, this paper discusses its metallurgical properties, the relevant mechanisms of general, localiz…
Abstract The susceptibility or Alloy 22 (N06022) to crevice corrosion may depend on environmental or external factors and metallurgical or internal factors. Some of the most important environmental factors are chloride concentration, inhibitors, temperature and potential. The presence of a weld seam and second phase p…
Abstract Most, probably all, structural materials have a fundamental susceptibility to SCC in high temperature water, although their specific response varies greatly with material and condition, water chemistry, temperature, stress, etc. The last twenty years of research has also established that most, probably all, v…
Abstract Investigations were conducted to investigate iron carbonate scale precipitation, the interaction between a corrosion inhibition and the precipitating iron carbonate scale, and their effects on the corrosion rate. Both the effects of iron carbonate precipitation on inhibited and uninhibited surfaces and the ef…
We investigated the dependence of giant tunnel magnetoresistance (TMR) on the thickness of an MgO barrier and on the annealing temperature of sputtered CoFeB/MgO/CoFeB magnetic tunnel junctions deposited on SiO2/Si wafers. The resistance-area product exponentially increases with MgO thickness, indicating that the qual…
Progress in the fabrication of nanometer-scale electronic devices is opening new opportunities to uncover the deepest aspects of the Kondo effect, one of the paradigmatic phenomena in the physics of strongly correlated electrons. Artificial single-impurity Kondo systems have been realized in various nanostructures, in…
Crystalline boron nitride nanotubes (BNNTs) with an average outer diameter of about 40 nm and several micrometres in length were synthesized by chemical vapour deposition from boron and magnesium oxide. Rietveld refinement and 11 B solid-state nuclear magnetic resonance (NMR) spectroscopy were employed to quantitative…
The crystal structures of [C(NH 2 ) 3 ] 3 [Sb 2 Br 9 ] (Gu 3 Sb 2 Br 9 ) at 300 K and of [C(NH 2 ) 3 ] 3 [Sb 2 Cl 9 ] (Gu 3 Sb 2 Cl 9 ) at 90 and 300 K are determined. The compounds crystallize in the monoclinic space group: C 2/ c . The structure is composed of Sb 2 X 9 3− (X = Cl, Br) ions, which form two-dimensiona…
Blends of cross-linked poly(ethylene glycol) dimethacrylate (PEGDMA) and poly(d,l-lactide) (PLA) were prepared by mixing photoactive PEGDMA (molecular mass: 875 g/mol) and PLA, and subsequently photopolymerizing the mixture with visible light. The effects of PLA molecular mass and mass fraction on the rheological prop…
▪ Abstract The key role of electron microscopy in understanding and creating advanced catalyst materials and processes in selective alkane oxidation, environmental control, and alternative energy sources is reviewed. In many technological processes, catalysts are increasingly nanoscale heterogeneous materials. With gr…
The use of a device consisting of alternating layers of high and low refractive index porous silicon, arranged as a Fabry–Perot cavity, as an inexpensive and miniature refractometer is investigated. The position of the reflectance minimum depends on the pore structure as well as on the material filling the pores. We s…
Neutron and x-ray diffraction experiments of high resolving power with neutrons from a spallation source and high-energy photons from a synchrotron have been performed on compositional series of binary tellurite glasses with additions of K 2 O or P 2 O 5 (max. 16 or 32 mol%). Since the P–O bond lengths do not interfer…
ADVERTISEMENT RETURN TO ISSUECommunication to the...Communication to the EditorNEXTDiffusion-Controlled Reactive Coupling at Polymer−Polymer InterfacesS. E. Harton, F. A. Stevie, and H. AdeView Author Information Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina…
Single edge notched beams of two nuclear graphites were oxidized in CO2 at 900°C up to 49% burn-off for IM1-24 graphite and up to 12% burn-off for PGA graphite, and fracture properties KIc, γwof and GIc were measured as a function of oxidation. Property decrements as a function of burn-off were fitted to an exponentia…
The structure of the compound {[Ph2(O)POCH2C(pz)3 Ag]2 (THF)2}(BF4)2 (pz = pyrazolyl ring) revealed a new coordination mode for the tris(pyrazolyl)methane donor set: two pyrazolyl rings bridging the same two silvers atoms using normal sigma-type orbitals on the nitrogen donor atoms while the third pyrazolyl ring coord…
Electromigration due to excessive current density stress in the interconnect can cause the premature failure of an electronic circuit. The ongoing reduction of circuit feature sizes has aggravated the problem over the last couple of years. It is therefore an important reliability issue to consider electromigration-rel…
Palladium catalysts supported on gamma-alumina (AN, AS), amorphous silica-alumina (ASA), and beta-zeolite (betaZ) were prepared with the aim to reduce the content of polycyclic aromatic hydrocarbons (PAHs) in diesel fuels. The removal of PAH compounds was evaluated with a model feed (toluene, naphthalene, and dibenzot…
Suspensions of three different clays in K15, a thermotropic liquid crystal, have been studied by optical microscopy and small angle x-ray scattering. The three clays were claytone AF, a surface treated natural montmorillonite, laponite RD, a synthetic hectorite, and mined sepiolite. The claytone and laponite were ster…
Boron carbides fabricated via plasma enhanced chemical vapour deposition from different isomeric source compounds with the same C 2 B 10 H 12 closo-icosahedral structure result in materials with very different direct (optical) band gaps. This provides compelling evidence for the existence of multiple polytypes of C 2…
Quasi-one-dimensional steady-state cavitating nozzle flows with homogeneous bubble nucleation and nonlinear bubble dynamics are considered using a continuum bubbly liquid flow model. The onset of cavitation is modeled using an improved version of the classical theory of homogeneous nucleation, and the nonlinear dynami…