Thermal-mechanical process in producing high dispersed tungsten-copper composite powder
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Release time:2021-07-17 Affiliation of Author(s):中南大学 Journal:International Journal of Refractory Metals and Hard Materials Key Words:thermal-mechanical process，tungsten-copper， reduction，BET specific area，particle size distribution Abstract:In this study, the reduction mechanism of tungsten-copper oxide precursors WO3, CuWO4 as well as the mixtures of these two components were analyzed in detail by TGA-DTA, SEM as well as particle size distribution, etc. The results showed that after milling for the oxide precursors in alcohol the reduced tungsten-copper composite powder showed better particle size distributions than the other two processes of dry milling and water milling. Surface modification by nitrogen showed to be effective in the anti-oxidation of the newly reduced powder because the absorption of nitrogen in the particle surface inhibits further oxidation. The final sintered parts of the reduced powder at 1200 degrees C and 60 min showed to have an extremely high relative density than the traditional process Indexed by:Article Discipline:Engineering First-Level Discipline:Materials Science and Engineering Document Type:J Volume:26 Issue:6 Page Number:540-548 Translation or Not:no Date of Publication:2008-06-17 Included Journals:SCI -
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