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首页> 外文会议>Proceedings of the 2nd international symposium on impact engineering >STUDY OF THE DYNAMIC COMPRESSION BEHAVIOR OF AN SHS-BASED TiB_2-Al_2O_3 CERAMIC COMPOSITE
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STUDY OF THE DYNAMIC COMPRESSION BEHAVIOR OF AN SHS-BASED TiB_2-Al_2O_3 CERAMIC COMPOSITE

机译：SHS基TiB_2-Al_2O_3陶瓷复合材料的动态压缩行为研究

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摘要

A TiB_2-Al_2O_3 ceramic composite material produced by powder metallurgy from SHS (Self propagating High temperature Synthesis) powders is examined and the characteristics of its dynamic behavior are studied along with a microstructural approach. The ceramic composite material is loaded under high strain rate conditions using Hopkinson bar devices (SPHB) in compression and displays a maximum compression strength of 4.5 GPa. Prior determination of the material mechanical characteristics in quasi-static reveals the influence of strain rate. Analysis of the role played by residual porosities on the development of microcracks leading to the ruin of the samples contributes to a better understanding of the failure mechanisms. On an other hand, the role played by the TiB_2 grains as to reinforce the alumina matrix via a crack deflexion mechanism has been characterized.
机译：研究了粉末冶金从SHS（自蔓延高温合成）粉末制备的TiB_2-Al_2O_3陶瓷复合材料，并研究了其动态行为的特征以及显微组织方法。使用霍普金森棒装置（SPHB）在压缩状态下以高应变速率条件加载陶瓷复合材料，其最大压缩强度为4.5 GPa。准静态材料力学特性的事先确定揭示了应变率的影响。分析残余孔隙在微裂纹发展中导致样品破坏的作用，有助于更好地理解破坏机理。另一方面，已经表征了TiB_2晶粒通过裂纹偏转机制来增强氧化铝基体的作用。

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