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:
High-energy milling has been used for production of nano-structured WC-Co powders.During the High-Energy Milling, the powders suffer severe high-energy impacts in the process ofball-to-ball and ball-to-vial wall collisions of the grinding media. Hard metal produced from nanostructuredpowders have better mechanical properties after appropriate sintering process. During themilling the particles size of WC and Co can be reduced and plastic deformed. In the present work, amixture of WC-10%Co was produced by high energy milling. The starting powders of the WC (0.87μm - Wolfran Bergau) and Co (0.93 μm - H.C.Starck) were used to produce the hard metal. Theinfluence of the milling time on the particle size distributions and in the lattice strain wasinvestigated. Milling time of the 2, 10, 20, 50, 70, 100 and 150 hours were used. The powders aftermilling were characterized by X-ray diffraction (XRD) and Scanning Electronic Microscopy (SEM).The results show that 10 h milling were enough to reduce the crystallite size of WC and the increaseof the milling time reduces the crystallite size
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/19/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.591-593.131.pdf
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