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Rheology effect and enhanced thermal conductivity of diamond/metakaolin geopolymer fabricated by direct ink writing

Yushen Wang (Gemmological Institute, China University of Geosciences, Wuhan, China)
Wei Xiong (Gemmological Institute, China University of Geosciences, Wuhan, China)
Danna Tang (Gemmological Institute, China University of Geosciences, Wuhan, China)
Liang Hao (Gemmological Institute, China University of Geosciences, Wuhan, China)
Zheng Li (Gemmological Institute, China University of Geosciences, Wuhan, China)
Yan Li (Gemmological Institute, China University of Geosciences, Wuhan, China)
Kaka Cheng (Gemmological Institute, China University of Geosciences, Wuhan, China)

Rapid Prototyping Journal

ISSN: 1355-2546

Article publication date: 1 June 2021

Issue publication date: 14 July 2021

Abstract

Purpose

Traditional simulation research of geological and similar engineering models, such as landslides or other natural disaster scenarios, usually focuses on the change of stress and the state of the model before and after destruction. However, the transition of the inner change is usually invisible. To optimize and make models more intelligent, this paper aims to propose a perceptible design to detect the internal temperature change transformed by other energy versions like stress or torsion.

Design/methodology/approach

In this paper, micron diamond particles were embedded in 3D printed geopolymers as a potential thermal sensor material to detect the inner heat change. The authors use synthetic micron diamond powder to reinforced the anti-corrosion properties and thermal conductivity of geopolymer and apply this novel geopolymer slurry in the direct ink writing (DIW) technique.

Findings

As a result, the addition of micron diamond powder can greatly influence the rheology of geopolymer slurry and make the geopolymer slurry extrudable and suitable for DIW by reducing the slope of the viscosity of this inorganic colloid. The heat transfer coefficient of the micron diamond (15 Wt.%)/geopolymer was 50% higher than the pure geopolymer, which could be detected by the infrared thermal imager. Besides, the addition of diamond particles also increased the porous rates of geopolymer.

Originality/value

In conclusion, DIW slurry deposition of micron diamond-embedded geopolymer (MDG) composites could be used to manufacture the multi-functional geological model for thermal imaging and defect detection, which need the characteristic of lightweight, isolation, heat transfer and wave absorption.

Keywords

Acknowledgements

The authors gratefully acknowledge the financial support from the Nation Natural Science Foundation of China (No. 51675496, No. 51902295, No. 51671091) and Gemological Institute China University of Geoscience (Wuhan) Foundation (GICTWZ-2019027) and Hubei Province Natural Science Foundation Grant (No. 2019CFB264). The project is also kindly supported by the Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) (No. CUG170677).

Competing interests: The authors declare that there is no conflict of interest regarding the publication of this paper.

Citation

Wang, Y., Xiong, W., Tang, D., Hao, L., Li, Z., Li, Y. and Cheng, K. (2021), "Rheology effect and enhanced thermal conductivity of diamond/metakaolin geopolymer fabricated by direct ink writing", Rapid Prototyping Journal, Vol. 27 No. 5, pp. 837-850. https://doi.org/10.1108/RPJ-06-2020-0124

Publisher

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Emerald Publishing Limited

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