Additive manufacturing of zirconia ceramic by fused filament fabrication

作者：Guan, Zhiheng; Yang, Xiaole; Liu, Peng; Xu, Xiewen; Li, Yuanbing; Yang, Xianfeng^*

来源：Ceramics International, 2023, 49(17): 27742-27749.

DOI：10.1016/j.ceramint.2023.05.230

• Fused deposition modeling
• Additive manufacturing
• Fused filament fabrication
• Zirconia

Fused filament fabrication (FFF) technology will facilitate the standardization of consumables and printing equipment for the additive manufacturing of engineered ceramics. In this study, a thermoplastic elastic binder based on styrene ethylene butylene styrene (SEBS) was optimized to realize the preparation of flexible filaments with solid loading of 43 vol%. The rheology, stress-strain behavior, and printing performance of the filament were systematically evaluated, and the feasibility of the fabrication of complex-shaped parts was verified. A microstructure model of the filament was innovatively established. The printed parts are suitable for solvent debinding at 40 degrees C, followed by thermal debinding and sintering to obtain dense zirconia ceramic materials. Microstructural analysis revealed two types of typical defects, interlayer bonding defects with a scale of about 1 & mu;m and triangular voids at path intersections with a scale of about 10 & mu;m. Zirconia ceramics with a relative density of 99.1% and a flexural strength of 492.8 & PLUSMN; 40 MPa was obtained by the FFF method.

• 单位
  长沙理工大学