超塑性接合したY-TZP, Y-TZP/アルミナ複合材料の繰り返し疲労特性

概要

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Cyclic bending fatigue tests were performed on Y-TZP, Y-TZP/Al_20_3 composite (3Y20A) , and superplas tic diffusion bonded materials. The relation between the maximum stress (σ_<max>) and the number of cycles to failure (N) was expressed as N=B/σ_<max> The fatigue exponents (n) of Y-TZP and 3Y20A were 26 and 61, respectively. Every fatigue specimen of 3Y20A-3Y20A bonded material was fractured at the bonding inter face with the fatigue exponent of 24. In the fatigue test of TZP-TZP bonded material, 33% of specimens were fractured at the bonding interface with the fatigue ex ponent of 16. The fatigue exponent of TZP TZP bond ed materials which were fractured at Y-TZP part was the same with that of Y-TZP. When fracture occurred at the bonding interface, ground marks were observed on the fracture surface. The bonded materials were more susceptible to cyclic fatigue than the base ma terials.
1994-10-01