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http://dx.doi.org/10.4191/KCERS.2005.42.3.171

Effect of Variation in Particle Size of WC and Co Powder on the Properties of WC-Co Alloys  

Chung, Tai-Joo (School of Materials Science and Engineering, Andong National University)
Ahn, Sun-Yong (Division of Research and Development, Korloy Inc.)
Paek, Yeong-Kyeun (School of Materials Science and Engineering, Andong National University)
Publication Information
Journal of the Korean Ceramic Society / v.42, no.3, 2005 , pp. 171-177 More about this Journal
Abstract
The effect of variation in particle size of WC and Co powder on the properties of WC-Co alloys was investigated. WC and Co powders having different particle sizes were used in the fabrication of $WC-10\;wt\%$Co composites. High hardness and low fracture toughness alloy was obtained with the decrease in WC particle size regardless of Co particle size. It was newly found in this investigation that the initial particle size of Co as well as WC had a great role in the microstructure and properties of WC-Co hard materials. The average grain size and fracture toughness of WC-Co alloys using same WC powder size increased and their hardness decreased with the use of relatively finer Co binder.
Keywords
Particle size; Grain size; Hardness; Fracture toughness;
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  • Reference
1 H. E. Exner, 'Physical and Chemical Nature of Cemented Carbides,' Inter. Metals Reviews, 24 [4] 149-73 (1979)   DOI
2 H. Suzuki, M. Sugiyama, and T. Umeda, 'Effect of the Carbon Content on Properties of WC-10%Co Alloy,' J. Jpn. Inst. Metals, 28 [2] 55-8 (1964)   DOI
3 F. V. Lenel, Powder Metallurgy Principles and Applications; pp. 383-400, Metal Powder Industries Federation, Princeton, New Jersy, 1980
4 D. F. Carroll, 'Processing and Properties of Ultrafine WC/Co Hard Materials,' Proc. of the 14th Inter. Plansee, Conf., Vol. 2 complied by G. Knerringer, P. Rodhammer, and P. Wilhartiz, pp. 168-82, Metallwerk Plansee, Austia, 1997
5 D. F. Carroll and C. L. Conner, 'Processing of Superfine WC Powders into High Quality WC/Co Materials,' Advances in Powder Metallurgy & Particulate Materials1997, complied by R. A. Mckotch and R. Webb, Metal Powder Industries Federation, p. 12/61-74, Princeton, New Jersy, 1997
6 S. Sundin and S. Haglund, 'A Comparison between Magnetic Properties and Grain Size for WC/Co Hard Materials Containning Additives of Cr and V,' Inter. J. Refract. Met. Hard Mater., 18 297-300 (2000)   DOI   ScienceOn
7 G P. Angelus, Da Silva, N. F. Da Silva, and U. U. Gomes, 'Effect of Milling Technique on the Dispersion, Sintering and Hardness of WC-Co Hard Metals,' Inter. J. Powder Metallurgy, 37 [6] 57-66 (2001)
8 S. J. Mashl, D. W. Smith, G H. Becking, and T. E. Hale, 'Attritor Milling of WC + 6% Co : Effects on Powder Characteristics and Compaction Behaviour,' Inter. J. Refract. Met. Hard Mater., 8 [1] 32-40 (1989)
9 K. Niihara, R. Morena, and D. P. H. Hasselmann, 'Evaluation of $K_{IC}$ of Brittle Solids by the Indentation Method with Low Crack-to-Indent Ratios,' J. Mater. Sci. Lett., 1 13-6 (1982)   DOI
10 J. H. Han and D. Y. Kim, 'Analysis of the Proportionality Constant Correlating the Mean Intercept Length to the Average Grain Size,' Acta Metall. Mater., 43 [8] 3185-88 (1995)   DOI   ScienceOn
11 P. Walter and H. Grewe, 'The Dependence of Coercive Force upon Microstructure in Technical Hard Metal Alloys,' Powder Metallurgy Inter., 3 [4] 180-82(1971)