Influence of Electric Fields on the Fracture Behavior of Ferroelectric Ceramics under Combined Electromechanical Loading

Abstract:

In this paper, fracture behavior of ferroelectric ceramics under combined electromechanical loading was investigated using moiré interferometry. It is found that the influence of electric field on fracture toughness is not very larger in the case that the directions of the poling, electric field and crack extension are perpendicular to each other. When the poling direction is parallel to the crack extension direction and both are perpendicular to the electric field direction, the normal strain measured reduced faster than that calculated by FEM with and without electrical loading as the distance away from the crack tip increases. Fracture toughness decreases obviously as the electric-field intensity increases.

• Periodical: Key Engineering Materials (Volumes 306-308)
• Pages: 1199-1204
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.306-308.1199
• Online since: March 2006
• Authors: Zhan Wei Liu, Dai Ning Fang, Hui Min Xie
• Keywords: Ferroelectric Ceramics, Fracture Toughness, Strain Concentration

References

[1] H. Mahkino and N. Kamiya: Effects of dc Electric Field on Mechanical Properties of Piezoelectric Ceramics. Appl Phys A Vol. 33(1994), p.5323.

[2] H.Y. Wang and R.N. Singh: Crack propagation in piezoelectric ceramics: Effects of applied electric fields. J Appl Phys Vol. 81(11) (1997), p.7471.

DOI: 10.1063/1.365290

[3] F. Meschke, A. Kolleck and G.A. Schneider: R-Curve Behaviour of BaT iO3 due to Stress-Induced Ferroelastic Domain Switching. Journal of the European Ceramic Society Vol. 17(1997), p.1143.

DOI: 10.1016/s0955-2219(96)00211-7

[4] R. Fu and T.Y. Zhang: Fracture of Piezoelectric Ceramics. Appl Mech Am Vol. 7(1999), p.647.

[5] S. Park and C.T. Sun: Fracture criteria for piezoelectric ceramics. J Am Ceram Soc Vol 78(1995), p.1475.

[6] R. Andreas and K. Meinhard: Influence of electric fields on the fracture of ferroelectric ceramics. Journal of the European Ceramic Society. Vol. 23(2003), p.1313.

[7] F. Fang, W. Yang and T. Zhu: Crack tip 90 0 domain switching in tetragonal lanthanum-modified lead zirconate titanate under an electric field. J Mater Res Vol. 14(1999), p.2940.

DOI: 10.1557/jmr.1999.0393

[8] D. Post, B.T. Han and P. Ifju: High Sensitivity Moiré Experimental Analysis for Mechanics and Materials. Springer-Verlag, New York, (1994).

[9] S.B. Park, S.S. Park, G.P. Carman and H.T. Hahn: Measuring Strain Distribution During Mesoscopic Domain Reorientation in a Ferroelectric Material. J Eng mater Tech Vol. 120(1998), p.1.

DOI: 10.1115/1.2806833

[10] S.B. Park, S.S. Park and G. P: Carman. Linear and Nonlinear Behavior of Piezoelectric Materials. SPIE., 2715(1996), p.366.

[11] J. Mencik: Strength and fracture of glass and ceramics. Glass Science and Technology, Elsevier, Amsterdan, 1992, p.172.

[12] F. Fang, W. Yang. Poling-enhanced fracture resistance of lead zirconate titanate ferroelectric ceramics, Materials Letters Vol. 46(2000), p.131.

DOI: 10.1016/s0167-577x(00)00155-5