ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Synthesis of single-phase tungsten sub-carbide W2C was attempted by heating pelletsmade out of a source of carbon (graphite-G) and W powders with G/W atom ratio between 0.35 and0.50 to two target temperatures, namely 1600ºC and 1900ºC in an argon atmosphere using a solarfurnace at PROMES-CNRS in Odeillo (France). The results showed that synthesis of single-phaseW2C phase was difficult at either target temperature yielding the W2C co-existed with free metallicW. It was noted that the thin top surface layer of the solar-synthesised tungsten carbide pelletsheated to 1900ºC was distinguishable from the rest of the bulk specimen showing localised growthof nano-meter scale WC whiskers over W2C grains. Detailed XRD (X-ray diffraction) results on theeffect of both G/W ratio and temperature on W2C lattice parameters are discussed
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/19/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.587-588.993.pdf
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