Mechanical qualification and microstructural analysis of alumina produced by material extrusion

Utsch D, Bründl P, Franke J, Erdogan H (2023)

Publication Type: Journal article

Publication year: 2023

Journal

Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing Elsevier

Pages Range: 145456

Article Number: 145456

DOI: 10.1016/j.msea.2023.145456

Abstract

Ceramics with their advantageous properties such as high thermal conductivity and electrical insulation are attractive to circuit carrier materials in electronics production. Using material extrusion (MEX-AM) for reasons of flexible manufacturing, this work produces green bodies with low surface roughness, which is necessary for subsequent metalizing to create 3D circuit carriers. Systematic variation of post-treatment profiles (debinding, sintering) leads to different microstructures and thus influences mechanical properties. A comprehensive mechanical qualification of ceramic samples produced with MEX-AM and post-treated differently has been carried out, in which tensile, compressive and flexural strength are analyzed. Using the Anderson Darling Test, it is shown that statistical methods standardized for conventional ceramics are applicable to additively manufactured specimens. A mean bending fracture strength comparable to conventional ceramics could be achieved combining a low heating rate profile for debinding with a two-step sintering (TSS) approach, which resulted in reduction of grain size, as SEM analysis confirmed.

Authors with CRIS profile

Daniel Utsch Lehrstuhl für Fertigungsautomatisierung und Produktionssystematik (FAPS) Patrick Bründl Lehrstuhl für Fertigungsautomatisierung und Produktionssystematik (FAPS) Jörg Franke Lehrstuhl für Fertigungsautomatisierung und Produktionssystematik (FAPS)

Involved external institutions

Conti Temic microelectronic GmbH DE Germany (DE)

How to cite

APA:

Utsch, D., Bründl, P., Franke, J., & Erdogan, H. (2023). Mechanical qualification and microstructural analysis of alumina produced by material extrusion. Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 145456. https://doi.org/10.1016/j.msea.2023.145456

MLA:

Utsch, Daniel, et al. "Mechanical qualification and microstructural analysis of alumina produced by material extrusion." Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing (2023): 145456.

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