Abstract
This paper presents research results on the temperature dependence of the fatigue and mechanical properties of piezoelectric ceramics. The material being examined is a lead zirconate titanate piezoelectric ceramic, PZT. The fatigue strength apparently increases with increasing sample temperature. The mean endurance limit at 105 cycles for the sample tested at 573 K is twice as high as that at 293 K. Similarly, the bending strength of the PZT increases with increasing sample temperature. A maximum bending strength is obtained at a sample temperature between 573 K and 773 K. The increment in the bending strength is attributed to the distorted lattice structure, in which a tetragonal lattice system is being changed to a cubic structure at 573 K, the Curie temperature. On the other hand, the reduction in the bending strength at temperatures greater than 773 K is caused by a reduction in the concentration of oxygen defects and high thermal energy, leading to dislocation movement. A wavy fracture surface with a mixture of transgranular and intergranular fractures is obtained in the samples fractured at temperatures between 573 K and 773 K due to the distorted lattice structure. In contrast, a flat face with transgranular fracture appears in tests at the room temperature and the high temperature (over 773 K). Details of the fracture mechanism are further discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 1254-1261 |
| Number of pages | 8 |
| Journal | International Journal of Fatigue |
| Volume | 31 |
| Issue number | 8-9 |
| DOIs | |
| Publication status | Published - Aug 2009 |
| Externally published | Yes |
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Keywords
- Brittle fracture
- Ceramic
- Failure assessment
- Fractography
- Fracture mechanics
ASJC Scopus subject areas
- Industrial and Manufacturing Engineering
- Mechanical Engineering
- Mechanics of Materials
- Materials Science(all)
- Modelling and Simulation
Cite this
Temperature dependence of the fatigue and mechanical properties of lead zirconate titanate piezoelectric ceramics. / Okayasu, Mitsuhiro; Otake, Masashi; Bitoh, Teruo; Mizuno, Mamoru.
In: International Journal of Fatigue, Vol. 31, No. 8-9, 08.2009, p. 1254-1261.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Temperature dependence of the fatigue and mechanical properties of lead zirconate titanate piezoelectric ceramics
AU - Okayasu, Mitsuhiro
AU - Otake, Masashi
AU - Bitoh, Teruo
AU - Mizuno, Mamoru
PY - 2009/8
Y1 - 2009/8
N2 - This paper presents research results on the temperature dependence of the fatigue and mechanical properties of piezoelectric ceramics. The material being examined is a lead zirconate titanate piezoelectric ceramic, PZT. The fatigue strength apparently increases with increasing sample temperature. The mean endurance limit at 105 cycles for the sample tested at 573 K is twice as high as that at 293 K. Similarly, the bending strength of the PZT increases with increasing sample temperature. A maximum bending strength is obtained at a sample temperature between 573 K and 773 K. The increment in the bending strength is attributed to the distorted lattice structure, in which a tetragonal lattice system is being changed to a cubic structure at 573 K, the Curie temperature. On the other hand, the reduction in the bending strength at temperatures greater than 773 K is caused by a reduction in the concentration of oxygen defects and high thermal energy, leading to dislocation movement. A wavy fracture surface with a mixture of transgranular and intergranular fractures is obtained in the samples fractured at temperatures between 573 K and 773 K due to the distorted lattice structure. In contrast, a flat face with transgranular fracture appears in tests at the room temperature and the high temperature (over 773 K). Details of the fracture mechanism are further discussed.
AB - This paper presents research results on the temperature dependence of the fatigue and mechanical properties of piezoelectric ceramics. The material being examined is a lead zirconate titanate piezoelectric ceramic, PZT. The fatigue strength apparently increases with increasing sample temperature. The mean endurance limit at 105 cycles for the sample tested at 573 K is twice as high as that at 293 K. Similarly, the bending strength of the PZT increases with increasing sample temperature. A maximum bending strength is obtained at a sample temperature between 573 K and 773 K. The increment in the bending strength is attributed to the distorted lattice structure, in which a tetragonal lattice system is being changed to a cubic structure at 573 K, the Curie temperature. On the other hand, the reduction in the bending strength at temperatures greater than 773 K is caused by a reduction in the concentration of oxygen defects and high thermal energy, leading to dislocation movement. A wavy fracture surface with a mixture of transgranular and intergranular fractures is obtained in the samples fractured at temperatures between 573 K and 773 K due to the distorted lattice structure. In contrast, a flat face with transgranular fracture appears in tests at the room temperature and the high temperature (over 773 K). Details of the fracture mechanism are further discussed.
KW - Brittle fracture
KW - Ceramic
KW - Failure assessment
KW - Fractography
KW - Fracture mechanics
UR - http://www.scopus.com/inward/record.url?scp=67349257202&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=67349257202&partnerID=8YFLogxK
U2 - 10.1016/j.ijfatigue.2009.01.008
DO - 10.1016/j.ijfatigue.2009.01.008
M3 - Article
VL - 31
SP - 1254
EP - 1261
JO - International Journal of Fatigue
JF - International Journal of Fatigue
SN - 0142-1123
IS - 8-9
ER -