Warsaw University of Technology

Warsaw University of Technology Repository
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    413 research outputs found

    Magnetically soft nanocrystalline powders of Fe 73.5 Cu 1 Nb 3 Si 13.5 B 9 obtained by mechanical alloying and ball milling

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    abstractEN: <p> Magnetically soft nanocrystalline powders of Finemet alloy (Fe <sub>73.5</sub> Cu <sub>1</sub> Nb <sub>3</sub> Si <sub>13.5</sub> B <sub>9</sub> ) were produced applying three techniques: (i) mechanical alloying of elemental powder mixtures, (ii) ball milling of crystalline ingots produced by induction melting of constituent elements of the alloy and (iii) ball milling of partially nanocrystalline ribbons (obtained initially as amorphous and nanocrystallized by annealing at 550°C for 1 h). Strong influence of powder manufacture method and milling time on magnetic softness was observed. Ball milled nanocrystalline ribbon exhibited the lowest coercive field H <sub>c</sub> , while mechanically alloyed elemental powders - the highest one. In all cases H <sub>c</sub> increased with processing time. The observed magnetic hardening of very soft nanocrystalline Finemet ribbon with the milling time was due to the decreasing size of the powder particles. </p>score: 0collation: 659-66

    Synthesis of Ethyl Levulinate, a Perspective Biocomponent of Motor

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    score: 7collation: 357-36

    Application of Enzymes and Flocculants in Ceramic Processing of Alumina

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    score: 8collation: 69-7

    New Low Toxic Water-Soluble Monomers for Gelcasting of Ceramic Powders

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    score: 0collation: 163-16

    PEO Based Highly Conductive Solid Electrolytes

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    score: 0collation: 185-19

    Numeryczne modelowanie kształtowania i obciążania połączeń nitowanych bezotworowo

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    abstractEN: In this paper authors presented modeling of SPR joint under load. Two commercial codes based on the FEM have been applied: MSC_SuperForm and MSC_Marc-Mentat. The 2D model of the joint formation has been proposed, and after simulation of the joint formation, the shape of it has been developed to 3D model. The stress and strain states have been superimposed on the 3D model and finally loading simulation based on the shear test schedule has been carried out.score:

    Some Issues of Modeling the Double Barrier Metal-Oxide-Semiconductor Tunnel Structures

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    score: 0collation: 77-8

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