A Study on Mechanical and Tribological Properties of Hot Pressed Al₂O₃/ZrO₂/h-BN/TiO₂ Composites

Abstract:

Oxide ceramics such as alumina and zirconia are industrially utilized as cutting tools, a variety of bearings, biomaterials, and thermal and corrosion-resistant coatings due to their high hardness, chemical inertness, high melting point, and ability to retain mechanical strength at elevated temperatures. In this research, the effect of other ceramic additives (TiO₂) and h-BN within alumina(α-Al₂O₃) and yttria-stabilized tetragonal (Y-TZP) composite was studied with respect to the mechanical and tribological properties. The lowest coefficient of frction of 0.45 was observed for the ZTA ceramic composite with hBN-TiO₂. The highest hardness, fracture toughness and flexural strength were obtained as 15.7GPa, 5.2MPam^-1/2, 712MPa, respectively.

• Periodical: Materials Science Forum (Volume 695)
• Pages: 417-420
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.695.417
• Online since: July 2011
• Authors: Hyun Hwi Lee, Seung Ho Kim, Bhupendra Joshi, Soo Wohn Lee
• Keywords: Al₂O₃, h-BN, Mechanical Property, TiO₂, Tribological Property, Zro₂

References

[1] M. Barsoum, Fundamentals of Ceramics, USA (1997).

[2] K.J. Konsztowicz, R. Langlois, J. Mater. Sci. Vol. 31 (1996), pp.1633-1641.

[3] E. Dorre, H. Huber, Springer, Berilin, (1984).

[4] D. Casellas, M. Anglada, J. Mater. Process Technol. Vol. 143-144 (2003), pp.148-152.

[5] P.G. Rao, T. Inoue, Scripta Materialia, Vol. 48 (2003), pp.437-441.

[6] A. Nevarez-Rascon, M.H. Bocanegra-Bernal, J. Refractory Metal & Hard Materials. Vol. 27 (2009), pp.962-970.

[7] I.M. Hutchings, Tribology: Friction and Wear of Eng. Mater., CRC Press Inc., USA (1992).

[8] H. Erkalfa, T. Bayakara, Ceram. Inter., Vol. 24 (1998), pp.81-90.

[9] B.R. Lawn and E.R. Fuller, J. Mater. Sci. Vol. 12 (1975), p. (2016).