Results 161 to 170 of about 1,536 (219)

The nitrides and oxide-nitrides of tungsten

Acta Metallurgica, 1954
Abstract A tungsten oxide-nitride with a composition close to the formula W.62N62O.38has been investigated by analytical and X-ray methods. It was obtained by reducing ammonium paratungstate or tungsten trioxide with ammonia, probably has metallic properties, and belongs to the interstitial compounds.
R Kiessling, L Peterson
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Reduction‐Nitridation Synthesis of Titanium Nitride Nanocrystals

Journal of the American Ceramic Society, 2003
Titanium nitride (TiN) particles (8 nm) were prepared via a reduction‐nitridation route in an autoclave at 500°C, using TiCl 4 , NH 4 Cl, and metal Na as reactants.
Xiaogang Yang, Cun Li, Lihua Yang, Yan Yan, Yitai Qian   +4 more
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Homogeneous Dispersion of Gallium Nitride Nanoparticles in a Boron Nitride Matrix by Nitridation with Urea

Journal of Nanoscience and Nanotechnology, 2010
A Gallium Nitride (GaN) dispersed boron nitride (BN) nanocomposite powder was synthesized by heating a mixture of gallium nitrate, boric acid, and urea in a hydrogen atmosphere. Before heat treatment, crystalline phases of urea, boric acid, and gallium nitrate were recognized, but an amorphous material was produced by heat treatment at 400 degrees C ...
Takafumi, Kusunose, Tohru, Sekino, Yoichi, Ando   +2 more
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Mysterious Platinum Nitride

Angewandte Chemie International Edition, 2006
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Jörg, von Appen, Marck-Willem, Lumey, Richard, Dronskowski   +2 more
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Niobium nitride/aluminum nitride superlattices

SPIE Proceedings, 1998
ABSTRACT DC reactive magnetron sputtering has been used to prepare niobium nitride/aluminium nitride superconductor/insulatorsuperlattices. Deposition conditions were optimized in order that multilayer fabrication could be achieved by simplecomputer control of the substrate positioning beneath each sputtering target.Transport measurements in the mixed ...
Zoe H. Barber, El Hadi S. Sadki, Richard A. Doyle, Stephen J. Lloyd, Mark G. Blamire   +4 more
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Preparation of Lutetium Nitride by Direct Nitridation

Journal of Materials Research, 2004
Lutetium nitride (LuN), an end member of a new quaternary system Si3N4–SiO2–Lu2O3–LuN, was synthesized by direct nitridation of a lutetium metal. The nitridation extent of the lutetium ingot (10 × 5 × 2 mm) reached about 97% by heating at 1600 °C for 8 h with an applied N2 pressure of 0.92 MPa; the initial shape of the bulk metal was maintained in the ...
Takayuki Suehiro, Naoto Hirosaki, Yoshinobu Yamamoto, Toshiyuki Nishimura, Mamoru Mitomo, Junichi Takahashi, Hisanori Yamane   +6 more
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Effect of NiS addition on nitridation of alumina to aluminum nitride using polymeric carbon nitride as a nitridation reagent

Ceramics International, 2016
Abstract We investigated the effect of adding nickel(II) sulfide (NiS) on nitridation of alumina (Al2O3) to aluminum nitride (AlN) using polymeric carbon nitride (PCN), which was synthesized by polymerization of dicyandiamide at 500 °C. The product powders obtained from nitridation of a mixture of δ-Al2O3 and NiS powders (mole ratio of 1:0.01) at ...
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Iron nitrides and laser nitriding of steel

Hyperfine Interactions, 1998
Nitriding of iron and steels is well known to improve hardness, wear and corrosion resistance of surfaces. Recently, it has been found that a simple irradiation of iron and steel with pulses of an excimer laser in air or nitrogen leads to a significant nitrogen take-up into the surface and to improvements in the surface properties.
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Investigation of nitriding directly in the nitriding process

Metal Science and Heat Treatment, 1982
1. We designed an apparatus and method of determining the phase composition at nitriding temperature. 2. At the beginning of the nitriding process (0.5 h) all phases corresponding to the Fe−N phase diagram are observed in Armco iron and the steels tested.
V. I. Konoval'tsev, A. P. Gulyaev, V. V. Nikitin   +2 more
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Nitriding Structure and Properties of Nitrided Layers

2014
Abstract Nitriding is a general term for all processes based on the addition of nitrogen to the surface of steel. When carbon is added along with the nitrogen, the process is called nitrocarburizing.  This article provides a detailed discussion on the functional and structural properties of nitrided layers. It describes the structural
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