Hybrid additive manufacturing of precision engineered ceramic components
Hybrid additive manufacturing of precision engineered ceramic components
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DOI：
10.1108/rpj-01-2019-0025
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发表时间：
2019-07
影响因子：
3.9
通讯作者：
J. Hinton;D. Basu;M. Mirgkizoudi;D. Flynn;R. Harris;R. Kay
中科院分区：
文献类型：
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作者：
J. Hinton;D. Basu;M. Mirgkizoudi;D. Flynn;R. Harris;R. Kay
目的本文的目的是开发一种用于生产高密度陶瓷部件的混合增材/减材制造平台。设计/方法/途径制造的近净形状的组件是实现使用96%的氧化铝陶瓷膏挤出和平面化加工操作。牺牲性聚合物载体可用于帮助形成悬垂或内部特征。使用各种加工操作进行后处理可以提高部件和CAD模型之间的公差和保真度，同时减少缺陷。结果这种三维整体陶瓷部件的烧结后公差为±100 µm，表面粗糙度为101 µm Ra，密度超过99.7%，三点弯曲强度为221 MPa。独创性/价值-这种方法代表了一种新的方法，用于陶瓷部件的数字化制造，它提供了改进的制造公差，零件质量和能力超过现有的增材制造方法。
Purpose The purpose of this paper is to develop a hybrid additive/subtractive manufacturing platform for the production of high density ceramic components. Design/methodology/approach Fabrication of near-net shape components is achieved using 96 per cent Al3O2 ceramic paste extrusion and a planarizing machining operations. Sacrificial polymer support can be used to aid the creation of overhanging or internal features. Post-processing using a variety of machining operations improves tolerances and fidelity between the component and CAD model while reducing defects. Findings This resultant three-dimensional monolithic ceramic components demonstrated post sintering tolerances of ±100 µm, surface roughness’s of ∼1 µm Ra, densities in excess of 99.7 per cent and three-point bending strength of 221 MPa. Originality/value This method represents a novel approach for the digital fabrication of ceramic components, which provides improved manufacturing tolerances, part quality and capability over existing additive manufacturing approaches.