期刊
RAPID PROTOTYPING JOURNAL
卷 25, 期 6, 页码 1061-1068出版社
EMERALD GROUP PUBLISHING LTD
DOI: 10.1108/RPJ-01-2019-0025
关键词
Ceramics; Additive manufacturing; Machining; Hybrid; Multi-process
资金
- EPSRC [EP/N018265/2] Funding Source: UKRI
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 mu m, surface roughness's of similar to 1 mu m 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.
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