Effect of Milling Speed on the Synthesis of In-Situ Cu-25 Vol. % WC Nanocomposite by Mechanical Alloying
DOI:
https://doi.org/10.11113/jt.v59.2599Keywords:
Mechanical alloying, Cu, WC, in-situ, milling speed, nanocompositeAbstract
This paper presents a study on the effect of milling speed on the synthesis of Cu-WC nanocomposites by mechanical alloying (MA). The Cu-WC nanocomposite with nominal composition of 25 vol.% of WC was produced in-situ via MA from elemental powders of copper (Cu), tungsten (W), and graphite (C). These powders were milled in the high-energy “Pulverisette 6†planetary ball mill according to composition Cu-34.90 wt% W-2.28 wt% C. The powders were milled in different milling speed; 400 rpm, 500 rpm, and 600 rpm. The milling process was conducted under argon atmosphere by using a stainless steel vial and 10 mm diameter of stainless steel balls, with ball-to-powder weight ratio (BPR) 10:1. The as-milled powders were characterized by X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). XRD result showed the formation of W2C phase after milling for 400 rpm and as the speed increased, the peak was broadened. No WC phase was detected after milling. Increasing the milling speed resulted in smaller crystallite size of Cu and proven to be in nanosized. Based on SEM result, higher milling speed leads to the refinement of hard W particles in the Cu matrix. Up to the 600 rpm, the unreacted W particles still existed in the matrix showing 20 hours milling time was not sufficient to completely dissolve the W.References
Stobrawa, J. P. and Z. M. Rdzawski. 2009. Characterisation of Nanostructured Copper-WC Materials. Journal of Achievements in Materials and Manufacturing Engineering. 32(2):171–8.
Hussain, Z. and S. B. Jamaludin. 2009. Studies on Mechanical Alloying of Copper-Tungsten Carbide Composite for Spot Welding Electrode. Journal of Materials Engineering and Performance. 18(9):1258–63.
Yusoff, M. R. Othman, and Z. Hussain. 2011. Mechanical Alloying and Sintering of Nanostructured Tungsten Carbide-Reinforced Copper Composite and Its Characterization. Materials and Design. 32(6):3293–8.
Tjong, S. C. and Z. Y Ma. 2000. Microstructural and Mechanical Characteristics of in Situ Metal Matrix Composites. Materials Science and Engineering: R: Reports. 29(3–4):49–113.
Hussain, Z. H. M. Salihin, and M. Yusoff. 2010. Microstructure and Properties of Copper Composite Containing in Situ NbC Reinforcement: Effects of Milling Speed. Journal of Alloys and Compounds. 489 (2): 369–74.
Neikov, O. D. S. Naboychenko, V. G Gopienko, I. V. Frishberg. 2009. Handbook of Non-Ferrous Metal Powders: Technologies and Applications: Elsevier.
El-Eskandarany, M. S.,A. A. Mahday, H. A. Ahmed, A. H. Amer. 2000. Synthesis and Characterizations of Ball-Milled Nanocrystalline Wc and Nanocomposite WC–Co Powders and Subsequent Consolidations. Journal of Alloys and Compounds. 312(1–2): 315–25.
Botcharova, E. M. Heilmaier, J. Freudenberger, G. Drew, D. Kudashow, U. Martin, L. Schultz. 2003. Supersaturated Solid Solution of Niobium in Copper by Mechanical Alloying. Journal of Alloys and Compounds. 351 (1–2): 119–25.
Huang, B. L., R. J. Perez, E. J. Lavernia, M. J. Luton. 1996. Formation of Supersaturated Solid Solutions by Mechanical Alloying. Nanostructured Material. 7: 67–79.
Chrysanthou, A. and G. Erbaccio. 1995. Production of Copper–Matrix Composites by in-Situ Processing. J Mater Sci. 30(24): 6339–44.
Bolokang, S. C. Banganayi, and M. Phasha. 2010. Effect of C and Milling Parameters on the Synthesis of WC Powders by Mechanical Alloying. International Journal of Refractory Metals & Hard Materials. 28(2): 211–6.
Suryanarayana, C. and M. G Norton. 1998. X-Ray Diffraction, a Practical Approach.. New York and London: Plenum Publishing Corp. 80–85.
Suryanarayana, C. 2004. Mechanical Alloying and Milling. United States of America: Marcel Dekker.
Boytsov, O. A. I. Ustinov, E. Gaffet, F. Bernard. 2007. Correlation between Milling Parameters and Microstructure Characteristics of Nanocrystalline Copper Powder Prepared Via a High Energy Planetary Ball Mill. Journal of Alloys and Compounds. 432: 103–10.
J. Eckert, J. C. Holzer III, C. E. Krill, W. L. Johnson. 1993. Mechanically Driven Alloying and Grain Size Changes in Nanocrystalline Fe-Cu Powders. Journal of Applied Physics. 73(6): 2794–802.
Suryanarayana, C. 2001. Mechanical Alloying and Milling. Progress in Materials Science. 46: 1–184.
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