Sintering and Characterization of Alumina Reinforced Tungsten Carbide Cobalt Composite

Abstract:

This paper is aimed at investigating the mechanical properties of spark plasma sintered alumina (Al₂O₃) reinforced with tungsten-carbide-cobalt (WC-12wt%Co). Pure Al₂O₃ and admixed-Al₂O₃ powders were sintered using spark plasma sintering (SPS) technique at a temperature of 1800°C, heating and cooling rates of 100 °C/min and 200 °C/min, a pressure of 48 MPa in an argon atmosphere. The density, hardness (HV) and indentation fracture toughness (K_IC) of the sintered samples were measured and compared. Between 9 and 17% increase was observed in the HV values of the additives, while the K_IC value recorded an increase between 17 and 63% for all the additive as compared to pure Al. Phase analysis and identification was carried out with X-ray diffraction and microstructure was taken with scanning electron microscope. The results obtained showed the samples potential for cutting tool applications.

• Periodical: Materials Science Forum (Volume 1090)
• Pages: 17-22
• DOI: https://doi.org/10.4028/p-5yqx84
• Online since: May 2023
• Authors: Kaisara Zibani Amos, Enoch Nifise Ogunmuyiwa*, Albert Uchenna Ude, Nastassia Thandiwe Sithole
• Keywords: Alumina, Characterization, Hardness, Indentation Fracture Toughness, Microstructure, Sintering

References

[1] W.H. Chen, H.T. Lin, P. K. Nayak, M.P. Chang, and J.L. Huang, 'Sintering behavior and mechanical properties of WC–Al2O3 samples prepared by spark plasma sintering (SPS)', Int. J. Refract. Met. Hard Mater., vol. 48, p.414–417, 2015.

DOI: 10.1016/j.ijrmhm.2014.10.016

[2] C.-T. Fu, J.-M. Wu, and A.-K. Li, 'Microstructure and mechanical properties of chromium carbide particulate reinforced alumina matrix samples', J. Mater. Sci., vol. 29, p.2671–2677, 1994.

[3] K. Niihara, T. Kusunose, S. Kohsaka, T. Sekino, and Y.-H. Choa, 'Multi-Functional Ceramic Samples trough Nanosamples Technology', vol. 163, p.527–534, 1999.

DOI: 10.4028/www.scientific.net/kem.161-163.527

[4] V. Trombini, K. P. S. Tonello, T. Santos, J. C. Bressiani, and A. H. de A. Bressiani, 'Sintering study of alumina/ niobium carbide/ tungsten carbide micro-nanosample', Eighth Int. Lat. Am. Conf. Powder Technol., vol. 7, p.787–792, 1997.

[5] Z. Pędzich, 'Tungsten Carbide as an Reinforcement in Structural Oxide-Matrix Samples', 2012.

[6] W. R. Matizamhuka, 'Spark plasma sintering (SPS) - An advanced sintering technique for structural nanosample materials', J. South. African Inst. Min. Metall., vol. 116, no. 12, p.1171–1180, 2016.

DOI: 10.17159/2411-9717/2016/v116n12a12

[7] D. S. Rao, G. Sivakumar, D. Sen, and S. V. Joshi, Detonation Sprayed Coatings and their Tribological Performances, no. January. 2015.

DOI: 10.4018/978-1-4666-7489-9.ch010

[8] S. Grasso, H. Yoshida, H. Porwal, Y. Sakka, M. Reece, Highly transparent α-alumina obtained by low cost high pressure SPS, Ceram. Int. 39 (2013) 3243–3248.

DOI: 10.1016/j.ceramint.2012.10.012

[9] E.A. Olevsky, W.L. Bradbury, C.D. Haines, D.G. Martin, D. Kapoor, Fundamental Aspects of Spark Plasma Sintering : I. Experimental, 2413 (2012) 2406–2413.

DOI: 10.1111/j.1551-2916.2012.05203.x

[10] D.M. Hulbert, D. Jiang, D. V Dudina, A.K. Mukherjee, Int . Journal of Refractory Metals & Hard Materials The synthesis and consolidation of hard materials by spark plasma sintering, Int. J. Refract. Met. Hard Mater. 27 (2009) 367–375.

DOI: 10.1016/j.ijrmhm.2008.09.011

[11] J.G. Santanach, A. Weibel, C. Estourns, Q. Yang, C. Laurent, A. Peigney, Spark plasma sintering of alumina: Study of parameters, formal sintering analysis and hypotheses on the mechanism(s) involved in densification and grain growth, Acta Mater. 59 (2011) 1400–1408.

DOI: 10.1016/j.actamat.2010.11.002

[12] M. Tokita, Spark Plasma Sintering Method, Systems, and Applications, 2nd edition, Elsevier, 2013.

[13] B.O. Guillon, J. Gonzalez-julian, B. Dargatz, M. Herrmann, T. Kessel, G. Schierning, R. Jan, Field-Assisted Sintering Technology/Spark Plasma Sintering: Mechanisms, Materials, and Technology Developments, (2014) 830–849.

DOI: 10.1002/adem.201300409

[14] W. Chen, H. Lin, P.K. Nayak, M. Chang, J. Huang, Sintering behaviour and mechanical properties of tungsten carbide–alumina samples prepared by spark plasma sintering (SPS), RMHM. 48 (2015) 414–417.

DOI: 10.1016/j.ijrmhm.2014.10.016

[15] K. Niihara, T. Kusunose, S. Kohsaka, T. Sekino, and Y.-H. Choa, 'Multi-Functional Ceramic Samples trough Nanosamples Technology', Ceram. Soc. Japan, vol. 163, p.527–534, 1999.

DOI: 10.4028/www.scientific.net/kem.161-163.527

[16] K.Z, Amos, 2019, 'Spark Plasma Sintering of Alumina Reinforced with Tungsten Carbide-Cobalt Systems', MEng dissertation, Botswana International University of Science and Technology, Palapye.