Qianshun Cui , Zhifeng Huang , Xuye Wang , Ao Wang , Shuai Zhang , Kai Liu , Fei Chen
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引用次数: 0
Abstract
Ultra-high-temperature ceramics (UHTCs) are promising candidates for thermal structures in extreme environments requiring exceptional resistance to temperatures above 2000 °C. Processing these materials via vat photopolymerization-based additive manufacturing remains unattainable, one major obstacle is the high absorbance of conventional ceramic powders. This study introduces an innovative solution utilizing low-absorbance ZrB2 precursors. The results indicate that carbon sources significantly influence the absorbance of precursors, with sorbitol-derived precursors exhibiting notably lower absorbance values (0.16) at 405 nm compared to pure ZrB2 powders (0.83). The corresponding photosensitive slurries demonstrate favorable photocuring behavior, facilitating successful additive manufacturing processes. Post-processing through carbonization and boro/carbothermal reduction yields ZrB2-based ceramics with high mechanical strength and low thermal conductivity, similar to the properties of most porous UHTCs produced by conventional methods. Notably, the printed gyroid-shaped components display mechanical properties comparable to those of conventionally manufactured simple-shaped ones. This approach holds potential for extending the production capabilities to other types of UHTCs.
期刊介绍:
The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.