Materials Literature
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This work presents a novel membrane deflection fracture experiment (MDFE) to investigate the fracture toughness of microelectromechanical systems (MEMS) and other advanced materials in thin film form. It involves the stretching of freestanding thin-film membranes, in a fixed-fixed configuration, containing preexisting…
Conventional and landmark-based geometric morphometric approaches were used to clarify the taxonomic identity of a centric diatom morph. This morph, found in cultures isolated from the Geeste estuary (northern Germany), showed an intermediate valve morphology between that of typical specimens of Cyclotella meneghinian…
Diamond like carbon (DLC) coatings have been investigated for application in the automotive valve train and, in particular, the camshaft drive assembly. The drive assembly can have various force transfer devices, such as an overhead bucket tappet assembly or a cam follower assembly. Force transfer devices operate in s…
The present study describes a method to fabricate polymer matrix nanocomposites by reinforcing multi-walled carbon nanotubes through an extrusion process. Linear low density polyethylene (LLDPE) powder and multi-walled carbon nanotubes (CNTs) are first dry mixed and extruded in the form of filaments by a single screw…
Abstract The main objective of this paper is to describe the effects of a long service exposure of the PWR fuel cladding tubes on their thermal-mechanical properties during and after a hypothetical LOCA transient. Within this prospect, specific studies have been performed: on one hand, thermal ramp tests under uniaxia…
We explain how the manufacturing technology and reliability for advanced interconnects is impacted by the choice of metallization and interlayer dielectric (ILD) materials. The replacement of aluminum alloys by copper, as the metal of choice at the 130-nm technology node, mandated notable changes in integration, metal…
Wastage as a result of the combined effects of wear and corrosion occurs in many environments, ranging from offshore to the healthcare industries. In such cases, the degradation is dependent on a wide range of parameters relating to the materials in contact and the nature of the corrosive environments. Defining condit…
The physical, chemical and mechanical properties of magnesium alloys make them attractive materials for automotive and aerospace applications. However, these materials are susceptible to corrosion and wear. This work discusses the potential of using sol-gel based coatings consisting of ZrO2 and 15 wt.% of CeO2. The Ce…
Abstract The centrosymmetric structure of Co 2 Al 9 (space group P 2 1 / c , Pearson symbol mP 22), the isotypic structures of Rh 2 Al 9 and Ir 2 Al 9 and the slightly distorted acentric structures of Rh 2 Ga 9 and Ir 2 Ga 9 (space group Pc ) were reinvestigated from single crystal X‐ray diffraction data. The structur…
The pressure wave propagation (PWP) method was developed 25 years ago to study space charges in solid dielectrics. This method has been a powerful tool in this field of research but has also proved its efficiency in adjacent fields for the characterization of materials or processes. In this paper the history of this m…
Purpose Work reported in the present paper investigated the inhibiting properties of a number of N‐heterocyclic amines in 0.1 mol/l HClO 4 . An attempt also was made to correlate some molecular parameters of these compounds with their corrosion inhibitor efficiency. Design/methodology/approach The test series included…
Abstract Significant data and milestones in the development of the ZIRLO alloy for PWR applications are reviewed. From humble beginnings as an R&D program, an approach to improving the corrosion resistance of zirconium-based alloys was developed. The corrosion resistance of dilute alloys is controlled by the micro…
The oxidation kinetics of non‐oxides depend on the inward diffusion of oxygen from the environment through the passivating silica overgrowth, the outward diffusion of the effluent species, e.g., CO, produced by the oxidation reaction at the interface, and the chemical driving forces for diffusion. An analysis that com…
In this paper we develop a kinetic model for the growth of electrical tree structures in solid polymeric insulation that allows for combined electrical and mechanical stresses. We present an energy balance analysis during the tree growth process and show the total tree extension driving force is not a material constan…
A cross-point-type phase-change random access memory (PRAM) cell without an access transistor is successfully fabricated with the In/sub 2/Se/sub 3/ resistor, which has much higher electrical resistivity than conventionally used Ge/sub 2/Sb/sub 2/Te/sub 5/ and of which electrical resistivity can be varied by the facto…
From both NMR and conventional rheometrical data we show that a foam cannot flow steadily below a critical, apparent shear rate and a critical shear stress. At low velocities the shear localizes in a layer of thickness decreasing with the apparent shear rate. When this thickness becomes smaller than a critical value h…
Part I of this two-part series reports on an experimental investigation of heat and moisture transfer through clothing assemblies consisting of porous fibrous battings sandwiched by inner and outer layers of a thin covering fabric. The experiments are conducted on a novel sweating, guarded hot plate at -20 °C. The tem…
Abstract η 5 ‐CpMo(CO) 3 R complexes containing siloxane functional groups [(CH 2 ) 3 Si(OMe) 3 or (CH 2 )Si(OEt) 3 ] attached to either the cyclopentadiene ligand or directly to Mo were grafted on the mesoporous materials MCM‐41 and MCM‐48 by reaction of the OR (R=Me, Et) moieties in the silane ligand and surface sil…
Yttrium silicates are promising materials for improved oxidation and erosion protection for carbon fiber‐reinforced composites. A two‐layer coating system of low‐pressure plasma‐sprayed yttrium silicate on chemical vapor deposition‐SiC‐precoated C/C–SiC was tested under atmospheric re‐entry conditions simulated within…
Irradiation has a profound effect on the stress corrosion cracking propensity of austenitic alloys in high-temperature water. Irradiation-assisted stress corrosion cracking (IASCC) has been well documented both in the laboratory and in service over the past two decades. Numerous studies have shown that the degree of i…