Abstract

Time series of acoustic emission pulses are recorded when the surface of MgAl₂O₄ ceramics is damaged by the introduction of a Vickers pyramid. Based on the data of the frequency analysis of the emitted sound, the ratio of the size of intra- and intergranular microcracks is estimated depending on the load on the indenter. The statistical analysis shows that the energy distribution in acoustic pulses is always random, typical of the uncorrelated development of a fracture.

中文翻译：

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压入MgAl 2 O 4陶瓷时的声发射

摘要

当通过引入维氏金字塔损坏MgAl ₂ O ₄陶瓷的表面时，记录声发射脉冲的时间序列。根据发射声音的频率分析数据，根据压头上的负载估算出晶粒内和晶粒间微裂纹的尺寸比。统计分析表明，声脉冲中的能量分布始终是随机的，这是骨折不相关发展的典型特征。