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Ball milling of niobium

In order to produce niobium-base parts, its powder can be obtained through a powder metallurgy’s method called ball milling. In this article, the ball milling parameters, in the production of niobium’s powder,have been optimized using the Taguchi’s method in order to obtain a

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  • Structural evolution during intense ball milling of copper
    Structural evolution during intense ball milling of copper

    Sep 15, 1992 OSTI.GOV Journal Article: Structural evolution during intense ball milling of copper-niobium mixtures Title: Structural evolution during intense ball milling of

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  • High-energy ball milling of nonstoichiometric compounds
    High-energy ball milling of nonstoichiometric compounds

    Apr 01, 2020 Ball milling is a simple and efficient method for making nanocrystalline powders of various metals and alloys, oxides, carbides, sulfides, borides, and other compounds [1,7–21] with particles up to 20 nm in size intended for superconducting ceramic materials, materials with magnetic anisotropy, superhard metal-cutting materials, nanocomposites, and superplastic ceramics. High

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  • Ball-milling of elemental powders—compound formation
    Ball-milling of elemental powders—compound formation

    Sep 01, 1991 Mechanical alloying of elemental powders has been carried out by ball-milling in a number of systems containing boron and silicon with chromium and niobium. Detailed analysis of the milled powders has been performed by X-ray diffraction and electron microscopy as a

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  • Mechanochemical synthesis and characterisation of niobium
    Mechanochemical synthesis and characterisation of niobium

    Jun 01, 2019 Jun 01, 2019 Mechanochemical synthesis (MCS) investigations of niobium silicide powders in Nb 2 O 5 SiO 2 Mg powder mixtures were conducted via high-energy ball milling and leaching by means of process parameters such as the milling duration, initial Nb 2 O 5 crystal structure, and excess Mg amount. The compositional, thermal, and microstructural properties of the products

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  • Comparative Study of Phases Forming in Niobium
    Comparative Study of Phases Forming in Niobium

    Comparative Study of Phases Forming in Niobium-Antimony Oxides System upon High Temperature Treatment and High-Energy Ball Milling P. Dulian a;*, M. Piz b, E. Filipek b and K. Wieczorek-Ciuroaw a aCracow University of ecThnology, acultFy of Chemical Engineering and ecThnology, Warszawska 24, 31-155 Krak w, Poland

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  • (PDF) Mechanochemical Synthesis of Niobium Hydrides
    (PDF) Mechanochemical Synthesis of Niobium Hydrides

    The synthesis of niobium hydrides under ball milling of the pure Nb powder in hydrogen atmosphere or in the presence of H2O traces was investigated. It was shown by XRD method that niobium hydride

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  • Catalytic effect of niobium oxide on hydrogen storage
    Catalytic effect of niobium oxide on hydrogen storage

    Aug 15, 2006 Aug 15, 2006 We examined a catalytic effect of niobium oxide (Nb 2 O 5) on the hydrogen storage properties of MgH 2 prepared by mechanical ball milling method. The MgH 2 composite doped with 1 mol% Nb 2 O 5 by ball milling for 20 h desorbed hydrogen up to ∼6 mass% in the temperature range from 200 to 250 C at the heating rate of 5 C/min under a purified helium flow

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  • Fracture behavior of niobium by hydrogenation and its
    Fracture behavior of niobium by hydrogenation and its

    were prepared by hydrogenation and ball-milling at a temperature below 203 K, in which hydrogen was removed by dehydrogenation at above 724 K. Thus, fine and contamination-free Nb powders can be effectively fabricated by using hydrogenation, ball-milling, and dehydrogenation procedures. I. INTRODUCTION RECENTLY, niobium (Nb) powder has become

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  • Effects of niobium addition on microstructure and
    Effects of niobium addition on microstructure and

    different vanadium/niobium contents are listed in Table 1. Using DFT method, the powders were mixed in alcohol by a planetary ball mill using raw carbide powders (WC, Mo2C, Cr3C2, VC, NbC) and element powders (Fe, Co) with the particle size of 2−4 μm and 4−10 μm, respectively. The powders were milled for 48 h with a ball-to-powder weight

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  • Dynamics of Balls and Liquid in a Ball Mill
    Dynamics of Balls and Liquid in a Ball Mill

    dynamics inside the ball mill in dependence of the lling volumes of suspension and balls ... niobium carbide, chromium carbide, molybdenum carbide and/or tungsten/titanium carbide with a binder material which is usually cobalt but can be nickel or a com-bination of nickel and cobalt. The binder is added as a percentage by weight varying from 3%

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  • Hydrogen Sorption of Pure Mg and Niobium (V) Fluoride
    Hydrogen Sorption of Pure Mg and Niobium (V) Fluoride

    Abstract: In this work, niobium (V) fluoride was selected as an additive to heighten the hydrogen sorption rates of Mg. Specimens of pure Mg, 5 wt% niobium fluoride-added Mg, and 10 wt% niobium fluoride- added Mg were prepared by planetary ball milling in hydrogen. The hydrogen sorption properties of the specimens were then examined

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  • Microstructures and Mechanical Properties of Nb/Nb
    Microstructures and Mechanical Properties of Nb/Nb

    To develop advanced structural materials at very high temperatures, ball milling followed by reactive hot pressing was employed to fabricate binary Nb/Nb-silicide in-situ composites with 3.5 to 16 mol% silicon content. Changes in morphology during milling of niobium and silicon elemental powders were studied, and microstructures and mechanical properties of reactively hot pressed composites

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  • (PDF) Microstructures and Mechanical Properties of
    (PDF) Microstructures and Mechanical Properties of

    To develop advanced structural materials at very high temperatures, ball milling followed by reactive hot pressing was employed to fabricate binary Nb/Nb-silicide in-situ composites with 3.5 to 16

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