摘要
使用单边缺口拉伸试样对PZT-5压电铁电陶瓷进行恒载荷下的应力腐蚀研究,介质分别为水、甲醇和甲酰胺,结果表明, PzT-5压电陶瓷在这三种介质中均会发生应力腐蚀开裂.归一化应力腐蚀门槛应力强度因子分别为KISCC/KIC=0.66(水),0.73(甲醇)和0.75(甲酰胺).其中断裂韧性:KIC=(1.34±0.25)MPa·m1/2.
Stress corrosion cracking (SCC) of PZT piezoelectric ceramics in water, methanol and formamide has been investigated at constant load test using a single-edge notched tensile specimen. The result shows that SCC or static fatigue fracture could occur in the three solutions, and the normalized threshold stress intensity factors of SCC are K-ISCC/K-IC=0.66 (in water), 0.73 (in methanol) and 0.75 (in formamide), respectively, where K-IC =(1.34+/-0.25) MPa.m(1/2) is the fracture toughness.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2003年第2期182-184,共3页
Acta Metallurgica Sinica
基金
国家高技术研究发展规划G19990650
国家自然科学基金50131160738资助项目
关键词
PZT压电陶瓷
应力腐蚀
门槛应力强度
PZT ceramics
stress corrosion cracking
threshold stress intensity
