Neutron Diffraction Studies of Functionally Graded Alumina/Zirconia Ceramics

Abstract:

Article Preview

New functionally graded Al2O3/Y-ZrO2 ceramics are developed as a new material for production of hip prosthesis, especially all-ceramic hip bearings. The used concept of graded ceramics is expected to provide better long-term performance based on improved mechanical properties and lower clinical risks. Mechanical properties are strongly dependent on the distribution of residual stresses resulting mainly from phase specific stresses after cooling from the sintering temperature. However, these stresses could be optimized by an appropriate selection of a concentration profile of constituent phases. The non-destructive neutron diffraction mapping of residual stresses has been used to investigate this problem experimentally. In addition, the smallangle neutron scattering technique was applied to study the porosity in the ceramics as function of the production parameters.

Info:

Periodical:

Materials Science Forum (Volumes 492-493)

Edited by:

Omer Van der Biest, Michael Gasik, Jozef Vleugels

Pages:

201-206

DOI:

10.4028/www.scientific.net/MSF.492-493.201

Citation:

P. Lukáš et al., "Neutron Diffraction Studies of Functionally Graded Alumina/Zirconia Ceramics ", Materials Science Forum, Vols. 492-493, pp. 201-206, 2005

Online since:

August 2005

Export:

Price:

$38.00

[1] S. Ueda and M. Gasik: J. Therm. Stress. Vol 23 (2000), p.395.

[2] B. Hatton and S. Nicholson: J. Am. Ceram. Soc. Vol. 84 (2001), p.571.

[3] M. Gasik, Comput. Mech. Sci. Vol. 13 (1998), p.42.

[4] M. Gasik, B. Zhang, Comput. Mech. Sci. Vol. 18 (2000), p.93.

[5] M.T. Hutchings, A.D. Krawitz (eds. ), Measurement of Residual and Applied Stress Using Neutron Diffraction, NATO ASI Series, Applied Sciences 26 (Kluwer Acad. Publ., 1992).

DOI: 10.1007/978-94-011-2797-4

[6] P. Sarkar, S. Nicholson: J. Am. Ceram. Soc. Vol. 78 (1996), p. (1987).

[7] http: /www. ujf. cas. cz.

[8] M. Vrána, P. Mikula, P. Lukáš, J. Dubský, V. Wagner: Mat. Sci. Forum 321/324 (2000), p.338.

[9] P. Lukáš, P. Šittner, D. Neov, V. Novák, M. Vrána, P. Mikula, Physica B 276/278 (2000) 845.

[10] O. Glatter, Acta Phys. Austr. Vol. 47 (1977), p.83.

[11] http: /omega. ujf. cas. cz/~saroun/SAS/ Al2O3 + ZrO2 Al2O3 0. 0 0. 5 1. 0 1. 5 2. 0 2. 5 3. 0 volume fraction / % specimen sintered sintered + HIP Al2O3 + ZrO2 Al2O3 0. 0 0. 1 0. 2 0. 3 0. 4 mean radius / m specimen sintered sintered + HIP µ Fig. 8: Comparison of pore volume fractions in sintered and HIPed ceramics. Fig. 9: Mean radius of pores in sintered and HIPed ceramics.

DOI: 10.1016/0272-8842(85)90093-8

In order to see related information, you need to Login.