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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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PZT陶瓷的氢致滞后断裂
, PP. 625-628
Keywords: PZT压电陶瓷,氢致开裂,氢浓度
Abstract:
PZT压电陶瓷单边缺口恒载荷试样两面镀镍后在NaOH溶液中动态充氢时能发生氢致滞后断裂.研究了氢致滞后断裂门槛应力强度因子和试样中可扩散氢浓度的定量关系.结果表明,氢致断裂归一化门槛应力场强度因子KIH/KIC(KIC=1.34MPa@m1/2)随氢浓度对数的升高而线性下降,即KIH/KIC=0.4-0.155lnCo.当Co=9.84×10-4%(对应充氢电流300mA/cm2)时,KIH=0.01KIC.这表明,PZT陶瓷具有极高的氢致开裂敏感性.
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