Materials Literature
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The formation of chromate conversion coatings (CCCs) on commercially pure Al (AA1050) during immersion in a chromic/hydrofluoric acid solution has been investigated. A film formation mechanism is proposed based on the combination of open circuit potential measurements and surface analysis techniques, such as Auger ele…
We have developed a high-performance cathode for solid oxide electrolysis cells (SOECs) for hydrogen production. Mixed conducting samaria-doped ceria (SDC) particles were employed in combination with highly dispersed Ni electrocatalysts. The Ni (8 vol %) dispersed SDC cathode exhibited very high performance at a water…
microscopy, crystallography This paper discusses the results of a 3-day short course in spindle stage techniques recently offered at the McCrone Research Institute. The 14 students enrolled had levels of experience with spindle stage and optical crystallography which varied from novice to expert, but all were soon abl…
Typically, the debonding and sliding interface enabling fiber pullout for SiC‐fiber‐reinforced SiC‐matrix composites with BN‐based interphases occurs between the fiber and the interphase. Recently, composites have been fabricated where interface debonding and sliding occur between the BN interphase and the matrix. Thi…
The recent finding that radio frequency plasma activation of CH(4)/PH(3) gas mixtures can yield films with P : C ratios < or = 3 has served to trigger further research into new 'phosphorus carbide' materials. Theoretical and experimental results relating to periodic and amorphous materials, respectively, are presented…
Low temperature CO adsorption on a Pd-H-ZSM-5 sample results in formation of Pd3+(CO)2 species (2221 and 2200 cm−1). The dicarbonyl structure has been proven by coadsorption of 12CO and 13CO: mixed Pd3+(13CO)(12CO) species absorb at 2210 and 2158 cm−1. Evacuation of the sample at increasing temperatures leads to reduc…
A series of novel lanthanide polyoxomolybdates was synthesized by reaction of lanthanide cations with the Anderson type anion (TeMo(6)O(24))(6-). The polyoxometalates K(6n)(TeMo(6)O(24))(n)[(Ln(H(2)O)(7))(2)(TeMo(6)O(24))](n)[middle dot]16nH(2)O (Ln = Eu, Gd) and K(3n)[Ln(H(2)O)(5)(TeMo(6)O(24))](n)[middle dot]6nH(2)O…
Carbon nanotubes have been synthesised by catalytic chemical vapour deposition of a H2–CH4 mixture (18 mol% CH4) over (Mg,Co,Mo)O catalysts. The total amount of cobalt and molybdenum has been kept constant at 1 cat% and the proportion of molybdenum with respect to cobalt has been varied from x(Mo) = 0.25–1.0. This var…
Biomineralization leads to the formation of inorganic crystals with unique, ordered, refined shapes that are regulated by specific macromolecules. This process has been a source of inspiration for exploring novel approaches to the fabrication of inorganic-based surfaces and interfaces. Among those macromolecules, sulf…
Bubble nucleation sites in beer glasses should be uniformly small to ensure that the foam produced comprises homogenously small bubbles with attendant reduced degrees of disproportionation. The latter phenomenon is also hindered by increased film thickness in foam, which in turn will be enhanced by increased localised…
The electrochemical properties of the interface between Ni and yttria-stabilized zirconia (YSZ) in the H 2 H 2 O Ni YSZ electrode have been investigated in order to obtain knowledge on the effect of segregation of impurities to the electrode-electrolyte interface on performance. Even for a relatively pure nickel…
This paper proposes a simple, practical PSPICE model of a three-phase, three-legged, saturated transformer with accurate performance. The transformer is modeled with its electric and magnetic equivalent circuits and a simple but reliable characterization of its nonlinear magnetic behavior. Two three-phase transformers…
Oxygen plasma-treated quenched and annealed polypropylene (PP) films with different crystallinities were investigated to characterize the surface rearrangement behavior during aging using contact-angle measurements and X-ray photoelectron spectroscopy. Optimum plasma conditions were examined by varying the power, time…
Abstract This review describes nuclear waste forms for high-level waste (HLW), that is, glasses, ceramics, and glass-ceramics, as well as for low- and intermediate-level waste (LILW), that is, cement, bitumen, glass, glassy slags, and ceramics. Ceramic waste forms have the highest chemical durability and radiation res…
The coordinating chemistry of lanthanides, relevant to the biological, biochemical and medical aspects, makes a significant contribution to understanding the basis of application of lanthanides, particularly in biological and medical systems. The importance of the applications of lanthanides, as an excellent diagnosti…
Characterization and control of the mechanical properties of the extracellular matrix are critical to the interpretation of results of in vitro studies of cultured tissues and cells and for the design of functional engineered constructs. In this work a viscoelastic tensile test system and custom culture chambers were…
This article describes a number of important recent microscopy tools and their application in particular to the study of porous inorganic materials. The authors believe that these new techniques are on the threshold of delivering enormous new power in the chemist's arsenal for understanding new and complex behaviour i…
Author: Reuter, Karsten et al.; Genre: Journal Article; Issued: 2004-02-03; Open Access; Title: Oxide formation at the surface of late 4d transition metals: insights from first-principles atomistic thermodynamics
Dendrimers are highly branched macromolecules which may engage in host-guest interactions, acting as either hosts or guests; this review is specifically concerned with the binding behavior of dendrimers containing single or multiple guest residues interacting with individual, freely diffusing hosts.
Fillers are used along with various commodities as well as engineering polymers to improve the properties of polymers. The performance of filled polymers is generally determined on the basis of the interface attraction of filler and polymers. Fillers of widely varying particle size and surface characteristics are resp…