Investigation of the damage behaviour of refractory model materials at high temperature by combined pulse echography and acoustic emission techniques
Investigation of the damage behaviour of refractory model materials at high temperature by combined pulse echography and acoustic emission techniques
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DOI：
10.1016/j.jeurceramsoc.2008.04.023
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发表时间：
2008-11
影响因子：
5.7
通讯作者：
G. Briche;N. Tessier-Doyen;M. Huger;T. Chotard
中科院分区：
文献类型：
--
作者：
G. Briche;N. Tessier-Doyen;M. Huger;T. Chotard
了解高温浇注料的热机械行为对于将其用作冶金、水泥和石化行业的高温炉和精炼容器的衬里至关重要。越来越多地使用有限元计算来预测使用条件下的行为，这需要了解高温下的机械性能，尤其是模型材料的机械性能。这项工作在考虑成分之间的热膨胀不匹配的情况下，研究了两种两相耐火模型材料热循环过程中损坏行为的表征。声发射技术（AE）和超声波脉冲回波成像技术均在高温下进行，被用作无损表征方法，分别监测受到热应力的材料内的损伤扩展并跟踪相关弹性特性的演变。
The understanding of the thermomechanical behaviour of high temperature castables is essential for their use as linings in high temperature furnaces and refining vessels in the metallurgical, cement, and petrochemical industries. The increasing use of the finite element calculations for the prediction of the behaviour in using conditions requires the knowledge of mechanical properties at high temperature and especially for model materials. This work deals with the characterisation of the damage behaviour during thermal cycling of two two-phase refractory model materials when considering thermal expansion mismatch between the constituents. The acoustic emission technique (AE) and the ultrasonic pulse echography technique, both carried out at high temperature, were applied as non-destructive characterisation methods to monitor the damage extension within the materials submitted to thermal stress and to follow the evolution of the associated elastic properties, respectively.