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Heating process and damage evolution of microwave absorption and transparency materials under microwave irradiation

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Abstract

Microwave processing is a useful technique for improving the mechanical breakage of rocks and rock minerals. The heating process of microwave absorption materials, transparency materials, and interface properties were investigated in this study. The crack propagation, interfacial debonding, and failure mode of materials under microwave heating were investigated experimentally. The cell model was then established to evaluate the effect of the heating process. In this model, pyrite was considered as a strong microwave absorber, and calcite was assumed to be a non-microwave response phase. The temperature field, stress gradient, and damage evolution of the materials under microwave irradiation were analyzed. Additionally, the effects of microwave power and irradiation time on the mechanical behavior were investigated. Furthermore, the effects of the volume content, particle size, and particle interaction on the heating results were simulated. Theoretical analysis was conducted to understand the related heating phenomenon. This study could enhance the comprehensive understanding of microwave-induced degradation of hard rocks.

Article Highlights

  • Experimentally monitored microwave-induced crack propagation, interfacial debonding, and failure mode in pyrite-calcite specimen;

  • Employing Cell Model, numerically analyzed the dominant effect of microwave power density, absorber particle volume content and its distribution on heating process;

  • Numerically illustrated the chief drivers of crack and debonding behavior during microwave irradiation, i.e. temperature gradient and thermal stress gradient near pyrite-calcite interface.

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Acknowledgements

This work is supported by the National Natural Science Foundation of China (No. 11872287), the Found of Shaanxi Key Research and Development Program (No. 2019ZDLGY01-10).

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Authors and Affiliations

  1. School of Science, Xi’an University of Architecture and Technology, Xi’an, 710055, China

    Wei Wei, Zhushan Shao & Rujia Qiao

  2. Shaanxi Key Laboratory of Geotechnical and Underground Space Engineering, Xi’an, 710055, China

    Wei Wei, Zhushan Shao, Wenwen Chen, Rujia Qiao, Yuan Yuan & Junxi Cheng

  3. School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an, 710055, China

    Zhushan Shao, Wenwen Chen, Yuan Yuan & Junxi Cheng

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  1. Wei Wei
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  2. Zhushan Shao
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  3. Wenwen Chen
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  5. Yuan Yuan
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Correspondence to Zhushan Shao.

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Wei, W., Shao, Z., Chen, W. et al. Heating process and damage evolution of microwave absorption and transparency materials under microwave irradiation. Geomech. Geophys. Geo-energ. Geo-resour. 7, 86 (2021). https://doi.org/10.1007/s40948-021-00284-z

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