evaluating the contribution of corrosion in fatigue failures

subcritical crack growth by corrosion fatigue occurs by the synergistic interaction of cyclic loading and corrosion. in order to select an appropriate corrective action, it is usually necessary to determine the degree to which corrosion is influencing the fracture process. a practical example is described in which such a determination was..

a chemical-sensitive integrated-circuit' the operational transducer

a chemical-sensing integrated-circuit suitable for the measurement of ionic species in aqueous solutions is described: it utilizes a chemical-sensitive field-effect transistor (chemfet) as an integral element in an analogue electronic circuit, so as to provide an active (i.e. operational) chemical microtransducer on a 2.03*2.43 mm silicon..

characterization of interface states at ni/ncdf/sub 2/ schottky barrier type diodes and the effect of cdf/sub 2/ surface preparation

two schottky diodes were fabricated by evaporation of nickel on to an n-type cdf/sub 2/'yf/sub 3/ semiconductor. diode a was prepared on a slightly etched polished surface and diode b on an unpolished strongly etched surface. the current-voltage (i-v), capacitance-voltage (c-v), and conductance-voltage (g-v) characteristics were determine..

advanced technology for finishing of component surfaces (electric equipment manufacture)

the continuing elevation of the requirements that apply to the products turned out by the electric equipment industry entails improvement of all steps in the technological process by which they are fabricated so as to improve the quality of execution of both main and auxiliary operations, which primarily include finishing and decoration o..

relationship between beam and junction parameters in ion beam processed josephson devices

planar and edge-defined niobium-lead alloy josephson junctions were fabricated using an ion beam tunnel barrier process consisting of ar cleaning and ar/o/sub 2/ oxidation, with ion energies as low as 50 ev in the oxidation step, during which the ion energy and flux, oxygen fraction, and process time control junction critical current dens..

fabrication of a two-dimensional glucose sensor

the enzyme electrode-type sensor has previously been proposed for continuous in vivo monitoring of glucose concentration in diabetes. a description is given of a novel configuration of this sensor based on simple geometrical considerations that can detect glucose over a broad concentration range at very low oxygen concentrations. in the i..

polymer membrane electrode-based potentiometric gas sensors

new static and automated gas sensing arrangements for the detection of co/sub 2/ and nh/sub 3/ are described. these new sensors utilize polymer membrane type ion-selective electrodes as internal sensing elements with improved response times, selectivity, and detection limits when compared to traditional devices. in addition, the durable n..

drawing of high-strength long-length optical fibers for submarine cables

a drawing process for high-strength, long-length optical fibers intended for submarine cable has been developed using a carbon resistance furnace. surface treatment conditions for preforms, as well as cleanliness of the drawing furnace are discussed as means for minimizing flaw formations on the fibers during the drawing process. evaluati..

repairability of surface mount assemblies

surface mounting of components onto printed circuit boards is an outgrowth of the surface mounting of components onto a ceramic substrate used in the manufacturing of hybrid assemblies. the need for this technology became necessary due to the requirements of fabricating printed circuit boards and systems in denser packages various sources..

application of si-mbe for integrated circuits

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