The Effect of Hydrogen on the Fracture Properties of 0.8(Na1/2Bi1/2)TiO3-0.2(K1/2Bi1/2)TiO3 Ferroelectric Ceramics
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- Zhang, H., Su, Y., Qiao, L. et al. Journal of Elec Materi (2008) 37: 368. doi:10.1007/s11664-007-0342-y
The effect of hydrogen on the fracture properties of lead-free ferroelectric ceramics has been studied. For hydrogen precharged samples, the fracture toughness decreased linearly with both increasing hydrogen concentration and the logarithm of dwell time of indenting. Hydrogen-induced delayed propagation of unloaded indentation cracks can occur, and the threshold stress intensity factor of hydrogen-induced cracking induced by residual stress decreases linearly with increasing hydrogen concentration.