Structure and properties of bulk nano-structured WC–CO alloy by mechanical alloying

Autor:	M.A. Xueming, Zhitian Ling, Dong Yuan-Da, J.I. Gang
Rok vydání:	1998
Předmět:	Materials science Mechanical Engineering Alloy Metallurgy Metals and Alloys chemistry.chemical_element Tungsten engineering.material Grain size Carbide chemistry Mechanics of Materials Materials Chemistry engineering Particle Graphite Crystallite Ball mill
Zdroj:	Journal of Alloys and Compounds. 264:267-270
ISSN:	0925-8388
DOI:	10.1016/s0925-8388(97)00252-1
Popis:	Mixtures of elemental powders of nominal composition WC–6wt%Co and WC–6wt%Co–1wt%VC were prepared using 99.5% purity tungsten, graphite, cobalt and vanadium powders with particle sizes smaller than 75 μm. Mechanical alloying (MA) was performed in a QM-1 planetary ball mill. The structural evolution and the crystallite size changes of the powders during MA were monitored by X-ray diffraction. The results show that cemented carbides of WC–Co powder with crystalline sizes of about 10 nm were directly synthesized from elemental powders by mechanical alloying. Cold compacting was carried out at a pressure of 800 MPa using a manual uniaxial press with carbide insert dies. The hardness and sintered density of sintered samples were measured. The effects of small VC additions on the grain size, density and hardness of sintered samples were also investigated.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9820b6fcb8d882ee022f8f5e3d09e0e8 https://doi.org/10.1016/s0925-8388(97)00252-1 Zobrazit plný text záznamu Full Text from ScienceDirect