Materials Literature
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Electromigration in a hybrid interconnect which consists of copper metallization in via below, aluminum metallization in via above, and tungsten via in between has been investigated. Fatal failures are found to occur in copper segments of the hybrid structures we tested. Two distinct failure mechanisms in copper segme…
This paper reports a novel gas sensing method by using a thermoelectric device, thermopile in this case, with an embedded tin oxide catalyst. By using a thin catalyst film and gas adsorption process instead of absorption, the response time and recovery time were remarkably improved. And the fabricated sensor was chara…
Hydroconversion of methylcyclohexane was conducted over various noble metal-loaded catalysts at 493 K and atmospheric pressure. On the bases of the proposed reaction route and the rate of reaction over Ir/H-β zeolite, which was the best catalyst examined, we concluded that the low yield of the desired dimethylpentanes…
Silver(I) itaconic acid-based hydrogel complexes were synthesized and characterized in order to examine the potential use of these systems; FTIR, AFM, in vitro fluid-uptake, metal sorption and antibacterial activity assay measurements were used for the characterization. Metal (silver(I)) ion uptaken by IA-based hydrog…
In this paper, the failure of a pultruded glass fiber reinforced composite tube subjected to axial impact load transmitted by a small attached mass exposed to blast load is discussed. A numerical simulation is developed with LS-DYNA and is validated with experiments carried out on a ballistic pendulum by comparing the…
Abstract The spiro‐dibenzogermocine [O(o‐C6H4S)2]2Ge (1) was prepared in a reaction between O(o‐C6H4SH)2 and Ge(OiPr)4, and its molecular structure was determined by X‐ray diffraction studies. In the solid state, 1 shows the existence of two weak O → Ge transannular interactions, resulting in a hexacoordinated germani…
Poly(ether ether ketone) (PEEK) is an aromatic, very high temperature semi-crystalline polymer which exhibits a technologically useful combination of mechanical and chemical properties. In this study carbon nanofibers (CNFs) were used to prepare nanocomposites from PEEK using a polymer crystallization technique at int…
Thermal management is one of the major technical challenges to the commercialization of proton exchange membrane (PEM) fuel cells. Various aspects of thermal management, including the process of heat generation and heat transfer as well as cooling methods are introduced and discussed. Numerical modeling and in situ di…
Flow-acceleration corrosion (FAC) is a degradation mechanism that impacts carbon steel under conditions often found in both nuclear and fossil power plants. FAC damage is normally found between about 90 – 230°C. However, damage at higher temperatures and occasionally lower temperatures has been reported. Although not…
In vitro tests of dense hydroxyapatite materials The paper presents the results of the calcining process of deproteinised and defatted bone pulp called bone sludge. The calcining process was performed in two stages. The first step of the calcining process was realized at the temperature of 600°C in a rotary kiln. In t…
Fiber-matrix interface mechanical properties are the key design point for the composites, however, methodology for evaluating interface properties of C/Cs are not still well established. In this study, capability of the fiber bundle push-out method was demonstrated as a measurement technique of fiber-matrix interfacia…
The self-assembling behavior for the oligopeptides obtained from the dissolution of feather keratins via the alkaline hydrolysis process was investigated. The entities generated from the aqueous solution of oligopeptides showed a dendrite-like and non-birefringent structure. To enhance the molecular orientation for th…
In this work, we demonstrate the use of a voltage-applied Atomic Force Microscopy (VAFM) local anodic oxidation nanolithography process to precisely fabricate small (<20 nm) structures from graphene and carbon nanotube material. These graphitic materials have exceptional electrical properties which give them a niche i…
Sputter monitoring system using continuous-wave cavity ring-down spectroscopy (cw-CRDS) was built for both lifetime assessment and contamination effects in Hall thrusters. First, we have performed proof of principle measurements of sputtered boron atoms from BN targets by argon ions using pulsed CRDS. The measurement…
Separation of hemp fiber from woody core is a difficult process due to insufficient information in mechanical properties and inappropriate separation equipment. To design a reliable fiber separation system and to get pure fiber as required by the industry, it is necessary to characterize the properties of the fiber ma…
Fusion neutral beam systems have conventionally used gas cells of the beam isotope as neutralizers. In the design of negative ion beam systems for ITER, and likely also for future reactors, the large gas efflux arising from these cells can lead to many problems. We discuss the possibility of decreasing the gas load by…
Surface finish is one of the most relevant aspects of machining operations, since it is one of the principle methods to assess quality. Also, surface finish influences mechanical properties such as fatigue behavior, wear, corrosion, etc. The feed, the cutting speed, the cutting tool material, the workpiece material an…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Kurt Binder; Introduction to Monte Carlo simulations of polymers. AIP Conf. Proc. 21 January 2009…
A nondestructive assessment of the residual stress on machined uranium surfaces is provided by the correlation of thermoelectric power coefficient and induced impedance measurements. Thermoelectric power measurements utilize a contact nondestructive probe to assess defects in the near surface. Thermoelectric power mea…
Graphene is the subject of intense study due to its high mobility and mechanical integrity. These properties make it an attractive material for the “beyond CMOS” technology that will replace today’s transistor. Acceleration of process and device technology requires considerable advances in the imaging and characteriza…