Effect of Solid Content on PLZT Ceramic Slarry Flowability in 3D Printing by Single Screw Extrusion Mode
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摘要: 针对单螺杆挤出结构的浆料直写陶瓷3D打印工艺,配制了不同固相含量(60%,70%,75%,体积分数)的锆钛酸铅镧(PLZT)陶瓷浆料,利用MRT LBM方法研究了固相含量对浆料在螺槽内流动性能的影响。结果表明:3种陶瓷浆料均呈现出明显的剪切变稀的非牛顿流体特征;MRT LBM方法可以有效实现3D打印过程中陶瓷浆料的流动仿真;随固相含量增大,浆料流速减小;在保证浆料流变性满足打印要求的情况下,固相含量不应过高。Abstract: For the 3D printing process of slurry direct writing ceramics with single screw extrusion structure, lead lanthanum zirconate titanate (PLZT) ceramic slurries with different solid content (60%, 70%, 75%, volume fraction) were prepared, and the effect of solid content on the slurry flow performance in screw groove was studied by MRT LBM method. The results show that the three ceramic slurries all showed obvious non-Newtonian fluid characteristics of shear thinning. MRT LBM method could effectively realize the flow simulation of ceramic slurries during 3D printing. With the increase of solid content, the slurry flow speed decreased. In the case of ensuring that the slurry rheology met the printing requirements, the solid content should not be too high.
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Keywords:
- 3D printing /
- ceramic slurry /
- solid content /
- MRT LBM /
- rheology
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