Results 221 to 230 of about 322,256 (246)

Reinforcement of tungsten carbide grains by nanoprecipitates in cemented carbides

Nanotechnology, 2016
In contrast to the conventional method that obtains a high fracture strength of tungsten carbide-cobalt (WC-Co) cemented carbides by reducing WC grain size to near-nano or nanoscale, a new approach has been developed to achieve ultrahigh fracture strength by strengthening the WC grains through precipitate reinforcement.
Haibin Wang, Xingwei Liu, Xilong Wang, Chao Hou, Xuemei Liu, Xiaoyan Song   +5 more
openaire   +3 more sources

A Study on the Carbide Grain in the Cemented Titanium Carbides

Journal of the Ceramic Association, Japan, 1962
The shape and the size of carbide grains in nickel bonded titanium carbides were studied by metallographical methods to confirm the influences of sintering atmosphere, temperature, and of the amount of metal binder on the nature of carbide grains.The carbide and nickel powders were mixed and ball-milled with methyl alcohol for 25 hours.
Shiro Kohara, Eiji Niki, Kiyohiko Tatsuzawa   +2 more
openaire   +2 more sources

Metallographic Studies of Iron Carbide and Tungsten Carbide

Nature, 1958
IN most metallographic investigations of steels or of cemented carbides the fine details of the carbides are not studied. We have just completed an etching study of iron carbides made in three different ways and of some tungsten carbide (1/32-in. equilateral triangles) single crystals.
F. J. Radd, L. H. Crowder
openaire   +2 more sources

ChemInform Abstract: Catalysis with Carbides

ChemInform, 1996
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Russell R. Chianelli, Pham-Huu Cuong Pham-Huu Cuong, Marc-Jacques Ledoux   +2 more
openaire   +3 more sources

Comparison of molybdenum carbide and tungsten carbide for the hydrodesulfurization of dibenzothiophene

Catalysis Today, 2007
The molybdenum and tungsten carbides (Mo2C and W2C) were synthesized, characterized and tested in hydrodesulfurization (HDS) of dibenzothiophene (DBT). The phase purity of these catalysts was established by X-ray diffraction (XRD), and the surface properties were determined by N2 BET specific surface area (Sg) measurements, CO chemisorption and high ...
Szymanska-Kolasa, Agnieszka, Lewandowski, Marek, Sayag, Celine, Djéga-Mariadassou, G.   +3 more
openaire   +2 more sources

Silicon carbide — Titanium carbide nanocomposites: Microstructural investigation

Materials Research Bulletin, 1994
Abstract The interest in nanomaterials and nanocomposites compared to classical materials is discussed, taking SiC-TiC as an example. This nanocomposite is produced by chemical vapor deposition. The microstructure is investigated by SEM, TEM, HREM and microprobe analysis.
Gourbilleau, F., Maupas, H., Hillel, R., Chermant, J.L.   +3 more
openaire   +4 more sources

On the Contact of Liquid Nickel with Tungsten Carbide or Boron Carbide

Canadian Metallurgical Quarterly, 2009
AbstractMetal matrix composites (MMCs), consisting of a ceramic reinforcing phase combined with a tough metal matrix can be applied to steel substrates as wear coatings. The processing behaviour of two nickel matrix MMC's is investigated: Ni-WC and Ni-B4C. Experiments were designed and carried out where WC or B4C was added to molten nickel.
K.M. Jaansalu, K.A. Sandy, Hani Henein
openaire   +2 more sources

Oxidation of ultrafine boron carbide, vanadium carbide, and chromium carbide powders [PDF]

Soviet Powder Metallurgy and Metal Ceramics, 1983
A. A. Kornilov, G. V. Galevskii, Yu. L. Krut-skii   +2 more
openaire   +1 more source

ChemInform Abstract: ON THE BINDING IN CARBIDES

Chemischer Informationsdienst, 1982
The two-correlations model for the binding in alloy phases is applied to carbides. The model considers a valence electron spatial correlation (namedb correlation) and a core electron spatial correlation (namedc correlation) and assumes that they are in good commensurability with the crystal cella and with one another; the types of the correlations ...
openaire   +3 more sources

Formation and spectroscopy of carbides

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2001
We review the evidence for carbides in space both from infrared spectroscopy and direct measurements on presolar grains extracted from primitive meteorites. The paper includes a discussion of the structural properties of silicon carbide and metal carbides and their formation routes from the gas phase.
Harald Mutschke, Th. Henning
openaire   +3 more sources