著者

水上 正彦 山本 良治 浅田 信昭 松本 明英

出版者

Japan Society of Powder and Powder Metallurgy

雑誌

粉体および粉末冶金 (ISSN:05328799)

巻号頁・発行日

vol.53, no.2, pp.154-159, 2006-02-15

被引用文献数

2 7

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Nano-sized WC powder that is expected as the raw material for nano-sized WC-Co hardmetals with high hardness and strength was developed. The reaction path and morphological change in the reaction process of WO<SUB>3</SUB> with carbon powder (direct carburization) were firstly investigated by thermogravimetric analysis. The proper reaction condition examined by the thermogravimetric analysis was developed to trial production by direct carburization facilities.<BR>The direct carburization reaction from WO<SUB>3</SUB> to WC occurred through the generation of several intermediate products in the order of WO<SUB>3</SUB> → WO<SUB>2.72</SUB> → WO<SUB>2</SUB> → W → W<SUB>2</SUB>C → WC. The nano-sized particles were generated at the stage from WO<SUB>2.72</SUB> to WO<SUB>2</SUB>. We succeeded in the development of nano-sized WC powder less than 100 nm by controlling the reaction conditions for each intermediate products.