The present article is aimed at studying the deformation behavior of TiNi wire and knitted metal mesh under uniaxial tension revealing role geometry on their main mechanical characteristics mechanisms behavior. temperature dependence curve electrical resistance indicates that a two-stage martensitic transformation B2→R→B19′ occurring, responsible for superelasticity effect. TEM results showed r...

Energetics and quantized conductance in jellium-modeled nanowires are investigated using the localdensity-functional-based shell correction method, extending our previous study of uniform-in-shape wires @C. Yannouleas and U. Landman, J. Phys. Chem. B 101, 5780 ~1997!# to wires containing a variable-shaped constricted region. The energetics of the wire ~sodium! as a function of the length of the...

A metallic nanowire with quantized conductance was fabricated by electrochemically etching a narrow portion of a metallic wire supported on a solid substrate down to the atomic scale. The width of the nanowire was controlled flexibly by etching atoms away or depositing atoms back onto the wire with the electrochemical potential. Using a feedback loop this method can, at will, fabricate a single...

Ductile metal deformation processes aimed at production of wire of some sort are in use since over five thousand years, early ones dating back to the origins of copper and gold produc­ tion. Thin sheets, initially produced by hammering, were cut into thin strips suitable for ornamental pur­ poses. The introduction of die plate paved the way to round wire manufac­ turing, rather severe limitatio...

A striking feature in the phenomena of activation in passive iron wires immersed in solutions of nitric acid is that in acid above acer tain critical concentration the reaction is a temporary one, followed immediately by an automatic return of the metal to the passive state. 1 Activation initiated at any region of such a wire is thus trans~ mitted rapidly along its whole length in a wave-like m...

AIM The aim of the study is to investigate the galvanic corrosion potential of metal injection molding (MIM) brackets to that of conventional brackets under similar in vitro conditions with nickel-titanium and copper nickel-titanium archwires. MATERIALS AND METHODS Twenty-five maxillary premolar MIM stainless steel brackets and 25 conventional stainless steel brackets and archwires, 0.16 inch...

The conductance of a molecular wire connected to metallic electrodes is known to be sensitive to the atomic structure of the molecule-metal contact. This contact is to a large extent determined by the anchoring group linking the molecular wire to the metal. It has been found experimentally that a dumbbell construction with C(60) molecules acting as anchors yields more well-defined conductances ...

This report describes the findings in five cows from one dairy herd, in which all 31 cows were slaughtered or euthanised because of traumatic reticuloperitonitis. All the cows had numerous thin sharp pieces of metal attached to a magnet in the reticulum, giving the magnet a hedgehog-like appearance. Investigation revealed that the cattle had eaten forage harvested from a field immediately adjac...

Polyetheretherketone (PEEK) is now attracting attention as an alternative to metal alloys in the dental field. In the present study, we evaluated the load-deflection characteristics of PEEK wires in addition to their frictional properties. Three types of PEEK wires are used: two sizes of rectangular shape, 0.016 × 0.022 in² and 0.019 × 0.025 in² (19-25PEEK), and rounded shape, diameter 0.016 in...

During manufacture of wire bonding in packaged IC products, the breaking of bond wires and the peeling of bond pads occur frequently. The result is open-circuit failure in IC products. There were several prior methods reported to overcome these problems by using additional process flows or special materials. In this paper, a layout method is proposed to improve the bond wire reliability in gene...