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首页> 外文期刊>JSME International Journal. Series A, Solid mechanics and material engineering >AE Characterization of Fracture Behavior in Bioceramics under Simulated Body Environment
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AE Characterization of Fracture Behavior in Bioceramics under Simulated Body Environment

机译：模拟人体环境下生物陶瓷断裂行为的AE表征

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摘要

The effect of simulated body environment on mechanical properties and fracture behavior of bioceramics were investigated. Alumina ceramics, which is a typical bioinert ceramics, was used. Four-point bending tests were carried out in air, refined water and the simulated body fluid in order to investigate the dependence of micro-fracture process on environments. The microfracture process during the bending tests was evaluated by an acoustic emission technique. Rapidly increasing point of cumulative AE energy was observed before the final unstable fracture. It was understood that the stress at AE increasing point, σ_C, corresponds to the maincrack formation stress in the previous work. These test environments affected σ_C more strongly than bending strength, σ_B. Consequently, it was suggested that the critical stress, σ_C, is available as an evaluation parameter, which is essential as the yield strength in metals, for bioceramics.
机译：研究了模拟的人体环境对生物陶瓷力学性能和断裂行为的影响。使用了典型的生物惰性陶瓷氧化铝陶瓷。在空气，纯净水和模拟体液中进行了四点弯曲试验，以研究微破裂过程对环境的依赖性。弯曲测试过程中的微断裂过程通过声发射技术进行评估。在最终的不稳定断裂之前，观察到累积AE能量迅速增加。可以理解，在AE增长点σ_C处的应力对应于先前工作中的主裂纹形成应力。这些测试环境对σ_C的影响比对弯曲强度σ_B的影响更大。因此，建议将临界应力σ_C用作评估参数，对于生物陶瓷而言，该参数对于金属的屈服强度至关重要。

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