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Showing 1 to 16 of 16 for “"amorphous alloys"”.
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Measurements of magnetoresistance in amorphous alloys
Magnetoresistance data are presented on amorphous films of Gel Au, 8 Au, -x x 1-x x onto 10K sapphire substrates. Zero-field conductivity measurements show no systematic differences between the materials; magnetoresistance data reveal that the influence of spin-orbit coupling on the conductivity …
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Amorphous Ni-based Alloys as Alkaline Oxygen Evolution Electrocatalysts
… oxygen evolution reaction (OER) kinetics. Amorphous alloys display enhanced OER kinetics and stability over their crystalline counterparts but traditionally have had limited geometries (ribbons, flakes) due to material processing requirements tied to rapid solidification. These geometric …
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Atomistic simulations of radiation damage in amorphous metal alloys
… response mechanisms in irradiated crystalline alloys, comparatively little is known regarding the mechanisms of radiation damage in amorphous alloys. Knowledge of collision cascade dynamics is lacking, both with respect to the possibility of sub-cascade formation and concerning the types of …
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Pressure dependence of superconductivity in amorphous Ni x Zr 100-x alloys
… transition temperature Ic of a series of amorphous NixZr 1 OO-x alloys have been studied under quasmydrostatic pressures upto 8 G Pa. For amorphous samples having Ni-concentration less than 40%, i)Tc/dP is positive in sign and it decreases non linearly with increase in I. whereasdTcldP is …
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Processing and properties of FeW amorphous particle strengthened metal matrix composites
… reduced. A crystalline matrix reinforced with an amorphous form of the matrix is a possible solution to the problem. Composites of amorphous Fe-W alloy particles reinforcing an Fe matrix were produced using mechanical alloying. Bulk samples were produced and their properties were studied. After …
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Percolation phenomena in amorphous iron-nickel alloys
… applied fields, are reported for the series of amorphous alloys (FepNi1_p)80P20. The iron-rich alloys are shown to be good ferromagnets, with the expected ferromagnetic critical behavior. Nickel, however, serves as a paramagnetic diluent. The amorphous structure permits the production of alloys …
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Modelle für die Kleinwinkel-Streuung und Anwendungen
… of the process of nanocristallization of amorphous alloys. The investigation of SANS on Fe73.5Si15.5B7Cu1Nb3 shows that the Fe3Si type nanocrystals created in the amorphous matrix during annealing are covered by Nb-atoms. The accumulation of Nb-atoms or Nb-B-aggregates acting as inhibitors …
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Core excitons in amorphous magnesium alloys
… obtained in the range 40200 eV for Mg-Group V alloys. Sharp line structure was discovered for amorphous alloys of Mg-Bi and Mg-Sb near the photoabsorption threshold of the Mg 2p core level. These lines were strongest for compositions corresponding to the formation of intermetal1ic compounds in …
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Hard and tough electrodeposited aluminum-manganese alloys with tailored nanostructures
… overarching goal of this thesis. Binary Al-Mn alloys are electrodeposited using a conventional current waveform in a chloroaluminate electrolyte at ambient temperature. It is found that alloys with low Mn contents comprise micrometer-sized FCC grains. At intermediate Mn contents, the FCC grain …
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Electrochemical Hydrogen Absorption by Zr-Cu-Al-Ni Metallic Glasses
… of hydrogen has been studied on the Zr-based amorphous alloys. The influence of hydrogen absorption on the stability of the amorphous phase and its crystallisation was investigated. Additionally, the cathodic hydrogen reaction mechanism on the surface of the alloy, the reversibility of the …
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Rapid solidification of zinc based alloys
… areas : the development of zinc based brazing alloys for the joining of copper produced by the rapid solidification technique; the study of the development of microstructures in rapidly solidified dilute zinc alloys. A new model has been proposed, based on the present experimental results and …
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The effects of irradiation on the creep and hardening behavior of crystalline and amorphous materials
… the mechanical behavior of nanostructured and amorphous materials under harsh environments such as high irradiation dose and temperature is one of the major constraints in the development of novel materials for nuclear applications. This thesis explores the effects of irradiation on the …
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[57]Fe Mossbauer studies of surface interactions in a PVD process.
… formation of both crystalline Fe[x]Ti[1-x] and amorphous Fe[x]Ti[1-x] have been identified. The formation of the crystalline phase has been confirmed by XRD. Using a model of the 57Fe isomer shift dependence of x, in amorphous alloys yielded x=0.31 +/-0.08 for Fe[x]Ti[1-x] Further experiments …
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Shear-band structure in metallic glasses
Metallic glasses (MGs) are amorphous alloys that possess exceptional mechanical properties compared to their crystalline counterparts. The fundamental problem that currently prevents the use of MGs as reliable structural materials is the lack of understanding of how their structure evolves as a …
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Strukturelle, thermische und mechanische Charakterisierung von amorphen Eisenbasislegierungen und Glasmatrixkompositen
Gegenstand dieser Arbeit ist die Entwicklung, Herstellung und Charakterisierung verschiedener glasbildender Eisenbasislegierungen, mit dem Ziel: 1. durch umfangreiche Charakterisierung der Startlegierung Fe44,63Cr4,93Co4,93Mo12,61Mn11,03C15,56B5,81Y1,5 (at.%) Möglichkeiten zu evaluieren mit dieser …
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The Effect of Carbon Concentration on the Amorphization and Properties of Mechanically Alloyed Cobalt-Carbon Alloys
Magnetic alloys that are amorphous exhibit soft magnetic properties; hence they play an essential role in electronic and electrical systems and devices. They are used in applications that include electrical power generation and transmission, electronic motors, solenoids, relays, magnetic shielding, …