1255 圧電セラミックスの高温強度に関する研究(G03-9 材料力学(9)疲労・強度2,21世紀地球環境革命の機械工学:人・マイクロナノ・エネルギー・環境)
詳細
This paper presents research results on the temperature dependence of the fatigue and mechanical properties of piezoelectric ceramics. The material being examined is a PZT ceramics. The fatigue and mechanical strengths apparently increase with increasing sample temperature. The mean endurance limit at 10^5 cycles for the sample tested at 573K is twice as high as that at 293K. The increment in the material strength is attributed to the distorted lattice structure, in which a tetragonal lattice system is being changed to a cubic structure at 573K, the Curie temperature.
