Gelcasting, a near net shape technique
Gelcasting, a near net shape technique
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DOI：
10.1016/s0261-3069(99)00075-8
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发表时间：
2000-08-01
影响因子：
8.4
通讯作者：
Luyten, J
中科院分区：
文献类型：
--
作者：
Gilissen, R;Erauw, JP;Luyten, J
凝胶注模成型是一种受到世界各国重视的陶瓷成型新技术。该方法基于浆料的浇铸，所述浆料包含粉末、水和水溶性有机单体。在浇铸单体之后，然后使混合物聚合以形成胶凝部件。干燥、烧除和烧结完成了制造路线。该工艺是通用的，可用于广泛的陶瓷和金属粉末。这是一种适合于使用廉价模具制造近净形原型或小批量的技术。与粉浆浇注相比，胶凝部件更均匀，并且具有高得多的绿色强度。凝胶浇铸部件仅含有百分之几的有机成分，使得与注塑成型相比，粘合剂的去除不那么重要。在这篇文章中，我们描述了我们的经验，凝胶注模成型的氧化铝粉末。到目前为止，特别关注的是高Al 2 O3负载的浆料的制备、催化或热凝胶化本身、模具材料的选择、干燥步骤和绿色加工。(C)2000爱思唯尔科技有限公司版权所有。
Gelcasting is a new ceramic forming technique getting worldwide attention. The process is based on the casting of a slurry, containing powder, water and water-soluble organic monomers. After casting the monomer, the mixture is then polymerised to form gelled parts. Drying, burning out and sintering complete the manufacturing route. The process is generic and can be used for a wide range of ceramic and metallic powders. It is a suitable technique for the fabrication of near net shape prototypes or small series using cheap moulds. In contrast with slipcasting, gelled parts are more homogeneous and have a much higher green strength. Gelcast parts contain only a few percent of organic components making binder removal much less critical compared to injection moulding. In this contribution, we describe our experience of the gelcasting of Al2O3 powders. Until now special attention was given to the preparation of slurries with a high Al2O3 load, to the gelation itself, catalytic or thermal, to the choice of mould materials, to the drying step and to green machining. (C) 2000 Elsevier Science Ltd. All rights reserved.