Direct ink writing of hierarchical porous ultra‐high temperature ceramics (ZrB <sub>2</sub> )
نویسندگان
چکیده
An approach to producing hierarchical multi-scale porous ultra-high temperature ceramics (zirconium diboride, ZrB2) using 3D printing has been developed. Porous ceramic filaments can be printed via Direct Ink Writing (DIW) (paste extrusion). Millimeter scale porosity is created by the scaffold filaments. We introduce 20-micron-scale into with addition of oil produce capillary suspension paste inks. Micron-scale also developed partial sintering ceramic. The rheological (flow) properties inks suitable for extrusion through needle printer have characterized. samples are strengthened at high temperatures. Complex-shaped components and sintered crack-free components, but distortion during drying lead poor shape tolerance control. X-ray tomography used characterize internal structure components. Printed test bars measured in 4-point bend testing exhibit strength density ratio. Such materials potentially applications as insulation near very high-temperature surfaces aerospace applications.
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ژورنال
عنوان ژورنال: Journal of the American Ceramic Society
سال: 2021
ISSN: ['0002-7820', '1551-2916']
DOI: https://doi.org/10.1111/jace.17911