| 刘杰， 曹澍， 俞经虎.基于3D打印模具和凝胶注模成型的多孔氧化铝陶瓷成型工艺[J].轻工机械,2021,39(4):10-13 |
| 基于3D打印模具和凝胶注模成型的多孔氧化铝陶瓷成型工艺 |
| Forming Process of Porous Ceramics Based 3D Printing Mould Combined with Gelcasting |
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| DOI：10.3969/j.issn.1005 2895.2021.04.003 |
| 中文关键词: 3D打印 凝胶注模 多孔陶瓷 真空加压工艺 |
| 英文关键词:3D printing gelcasting porous ceramics vacuum pressure infiltration process |
| 基金项目:国家自然科学基金资助项目（51605193）；江苏省自然科学基金资助项目（BK20160181）。 |
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| 中文摘要: |
| 针对传统方法难以成型复杂结构多孔陶瓷，且模具制作周期长、成本高等问题，课题组研究了基于3D打印模具和凝胶注模成型的多孔陶瓷材料的成型工艺。在使用光固化成型技术制作高精度规则树脂模具的基础上，优化凝胶注模工艺所需的低黏度、高固含量氧化铝陶瓷浆料，借助真空加压工艺成型氧化铝陶瓷坯件，以此实现复杂结构多孔陶瓷零件的净成形；针对工艺中陶瓷浆料在复杂结构中的充型问题，研究了浆料pH值、分散剂用量、真空加压工艺对陶瓷成型的影响，测试了坯体气孔率、抗压强度等参数。结果表明：在pH值为9、分散剂质量分数为0.4%、真空加压90 min条件下,能够制备出体积分数为52%的氧化铝陶瓷，气孔率为51.5%，抗压强度为40.1 MPa。使用该工艺制备的陶瓷材料结构完整、表面光洁，可以作为制备复杂结构多孔陶瓷部件的工艺。 |
| 英文摘要: |
| Aiming at the difficulty in forming complex structure porous ceramics by traditional methods, and the high cost and the long cycle of the mold production, a forming process of porous ceramics based on 3D printing mould combined with gelcasting was studied. On the basis of high precision and regular shaped resin mold, alumina ceramic slurry with low viscosity and high solid content was optimized to realize the near net shaped forming of porous ceramic parts with complex structure with the help of vacuum pressure infiltration process. To solve the filling problem of ceramic slurry in complex structure, the influence of pH value of slurry, dosage of dispersant and degree of vacuum pressure on ceramic forming process were studied and the indexes of porosity and strength of the billet were tested. The results show that alumina ceramics with volume fraction of 52% were prepared under pH value of 9, dispersant mass fraction of 0.4% and vacuum pressure for 90 minutes, with porosity was 51.5% and the compressive strength was 40.1 MPa. The ceramic material prepared by this process has a complete structure and a smooth surface, which can be used as a process to prepare porous ceramic parts with complex structure. |
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