Results 241 to 250 of about 212,005 (311)

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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The effect of ultrasonic nanocrystal surface modification on low temperature nitriding of ultra-high strength steel

Surface & Coatings Technology, 2019
In this research, a surface plastic deformation layer was induced on 300M ultra-high strength steel using ultrasonic nanocrystal surface modification (UNSM). The UNSM-treated and control specimens were then nitrided at 450 °C for 6 h. After gas nitriding,
Weidong Zhao, Dao-xin Liu, Haifeng Qin, Xiao-hua Zhang, Hao Zhang, Ruixia Zhang, Z. Ren, Chi Ma, A. Amanov, Y. Pyun, G. Doll, Yalin Dong, Chang Ye   +12 more
semanticscholar   +1 more source

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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Surface nanocrystallization by ultrasonic nano-crystal surface modification and its effect on gas nitriding of Ti6Al4V alloy

Materials Science & Engineering: A, 2018
The effects of Ultrasonic Nanocrystal Surface Modification (UNSM) on the gas nitriding behavior of Ti6Al4V alloy have been investigated. Gas nitriding was performed at 700 and 800 °C.
Jun Liu, S. Suslov, Azhar Vellore, Z. Ren, A. Amanov, Y. Pyun, A. Martini, Yalin Dong, Chang Ye   +8 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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An enhanced rapid plasma nitriding by laser shock peening

Materials letters (General ed.), 2018
Laser shock peening was primarily adopted as a pretreatment prior to plasma nitriding for 42CrMo steel. It was found that laser shock peening had obvious enhancement effect on plasma nitriding.
Lei Tang, Weiju Jia, Jing Hu
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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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