Toughness Enhancement of Al2O3/Ce-TZP Functionally Graded Materials by Annealing in Inert Atmosphere

Abstract:

Article Preview

CeO2-stabilised ZrO2-based functionally graded materials (FGMs) can be successfully produced using electrophoretic deposition and pressureless sintering in air. A cylindrical Al2O3/ZrO2 FGM, for instance, shows an ideal structure for applications such as drill blanks. It has a central hole with a diameter less than 0.5 mm, a tough Ce-ZrO2 core with a diameter of about 3 mm, a gradient layer of about 1 mm, and a hard Al2O3-rich surface layer. The Ce-ZrO2 core shows a Vickers hardness between 10 and 11 GPa and an excellent toughness (>10 MPa m1/2). In the gradient layer, hardness and toughness vary continuously along the radius. The Al2O3-rich surface layer has a hardness of 15.2 GPa but a modest toughness of 2 MPa m1/2. Annealing experiments of the air-sintered FGM in inert atmosphere (Ar + 5 vol % N2) allows a significant toughness enhancement, especially in the surface layer (up to 8 MPa m1/2). The experimental results indicate that a proper controlled reduction of the Ce-TZP phase allows a modification of the toughness of the Ce-TZP phase. The influence of the annealing cycle on the properties of the FGM are reported and elucidated.

Info:

Periodical:

Materials Science Forum (Volumes 492-493)

Edited by:

Omer Van der Biest, Michael Gasik, Jozef Vleugels

Pages:

699-704

Citation:

J. Vleugels et al., "Toughness Enhancement of Al2O3/Ce-TZP Functionally Graded Materials by Annealing in Inert Atmosphere ", Materials Science Forum, Vols. 492-493, pp. 699-704, 2005

Online since:

August 2005

Export:

Price:

$38.00

[1] O. Van Der Biest and L. Vandeperre: Ann. Rev. Mater. Sci. Vol. 29 (1999), p.327.

[2] P. Sarkar and P.S. Nicholson: J. Am. Ceram. Soc Vol. 79 (1996), p. (1987).

[3] I. Zhitomirsky: J. Eur. Ceram. Soc. Vol. 18 (1998) p.849.

[4] Z. Wang, J. Shemilt and P. Xiao: Scripta Mat. Vol. 42 (2000), p.653.

[5] A.R. Boccaccini, P.A. Trusty, D.M.R. Taplin and C.B. Ponton: J. Eur. Ceram. Soc. Vol. 16 (1996), p.1319.

[6] L. Vandeperre and O. Van Der Biest: Key Eng. Mat Vol. 127-131 (1997), p.567.

[7] P.S. Nicholson, P. Sarkar and S. Datta: Am. Ceram. Soc. Bull. Vol. 75 (1996), p.48.

[8] C. Kawai and S. Wakamatsu: J. Mater. Sci. Lett. Vol. 14 (1995), p.467.

[9] C. -Y. Chen, S. -Y. Chen and D. -M. Liu: Acta Mater. Vol. 47 (1999), p.2717.

[10] S. Put, G. Anné, J. Vleugels and O. Van der Biest: Key Eng. Mat. Vol. 206-213 (2002), p.189.

[11] S. Put, J. Vleugels and O. Van der Biest: Scripta Mat. Vol. 45 (2001), p.1139.

[12] C. Zhao, J. Vleugels, L. Vandeperre, B. Basu and O. Van Der Biest: Mat. Sci. Forum Vol. 308-311 (1999), p.95.

[13] J. Vleugels, G. Anné, S. Put and O. Van der Biest: Mat. Sci. Forum Vol. 423-425 (2003), p.171.

[14] S. Put, J. Vleugels and O. Van der Biest: Acta Mat. Vol. 51 (2003), p.6303.

[15] S. Put, G. Anne, J. Vleugels, O. Van der Biest: J. Mat. Sci. Vol. 39 (2004), p.881.

[16] RHJ. Hannink, PM. Kelly and BC. Muddle: J Am Ceram Soc. Vol. 83 (2000), p.461.

[17] JD. Cawley: Materials Science and Technology. Structure and properties of ceramics 11. (VCH, Weinheim, Germany) (1994), p.101.

[18] T. Sato and M. Shimada: Am. Ceram. Soc. Bull. Vol. 64 (1985), p.1382.

[19] K. Haussner and N. Claussen: J. Am. Ceram. Soc. Vol. 72 (1989), p.1044.

[20] GSAM. Theunissen, AJA. Winnubst and AJ. Burggraaf: J. Eur. Ceram. Soc. Vol. 9 (1992), p.251.

[21] PF. Becher and MV. Swain: J. Am. Ceram. Soc. Vol 75 (1992), p.493.

[22] Y. Zhou and MN. Rahaman: Acta. Mater. Vol. 45 (1997), p.3635.

[23] C. Zhao, J. Vleugels, B. Basu and O. Van der Biest: Scripta Mater. Vol. 43 (2000), p.1015.

[24] J. Vleugels and O. Van der Biest: Key Eng. Mater. Vol. 206-213 (2002), p.273.

[25] C. Zhao, L. Vandeperre, J. Vleugels and O. Van der Biest: British Cer. Trans. Vol. 99 (2000) p.284.

[26] J. Vleugels, C. Zhao and O. Van Der Biest: Scripta Mater. Vol. 50 (2004), p.679.

[27] G.R. Anstis, P. Chantikul, BR. Lawn and DB Marshall: J. Am. Ceram. Soc. Vol. 64 (1981), p.533.

[28] HK. Schmid: J. Am. Ceram. Soc. Vol. 74 (1991), p.387.

[29] S-L. Hwang and I-W. Chen: J. Am. Ceram. Soc. Vol. 73 (1990), p.3269.

Fetching data from Crossref.
This may take some time to load.