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Hybrid additive manufacturing of precision engineered ceramic components

Hybrid additive manufacturing of precision engineered ceramic components The purpose of this paper is to develop a hybrid additive/subtractive manufacturing platform for the production of high density ceramic components.Design/methodology/approachFabrication 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.FindingsThis 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/valueThis 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. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Rapid Prototyping Journal Emerald Publishing

Hybrid additive manufacturing of precision engineered ceramic components

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References (34)

Publisher
Emerald Publishing
Copyright
© Emerald Publishing Limited
ISSN
1355-2546
DOI
10.1108/rpj-01-2019-0025
Publisher site
See Article on Publisher Site

Abstract

The purpose of this paper is to develop a hybrid additive/subtractive manufacturing platform for the production of high density ceramic components.Design/methodology/approachFabrication 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.FindingsThis 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/valueThis 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.

Journal

Rapid Prototyping JournalEmerald Publishing

Published: Aug 21, 2019

Keywords: Ceramics; Additive manufacturing; Machining; Hybrid; Multi-process

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