Geometric characterization of additively manufactured polymer derived ceramics
| Autor: | Biesboer Scott M, Zak C. Eckel, Emily C. Schueller, Kenneth Cante, Tobias A. Schaedler, Brennan Yahata, Jacob M. Hundley |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Pressing Materials science Biomedical Engineering Sintering 02 engineering and technology 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Industrial and Manufacturing Engineering law.invention Characterization (materials science) Machining law visual_art 0103 physical sciences visual_art.visual_art_medium Ultraviolet light General Materials Science Ceramic Composite material 0210 nano-technology Engineering (miscellaneous) Stereolithography |
| Zdroj: | Additive Manufacturing. 18:95-102 |
| ISSN: | 2214-8604 |
| DOI: | 10.1016/j.addma.2017.08.009 |
| Popis: | The high hardness, melting temperature and environmental resistance of most ceramic materials makes them well-suited for propulsion, tribilogical and protective applications. However, these same attributes pose difficulties for manufacturing and machining of ceramics and ultimately limit the achievable design space of these materials. Recently, a new class of preceramic photopolymers has been developed that enables additive manufacturing of ceramics using commercially available stereolithography systems. By consolidating preceramic monomers via layer-wise exposure to ultraviolet light and subsequently pyrolyzing under an inert atmosphere to form a ceramic, this method allows for complex geometry parts that cannot be produced with traditional sintering, pressing or vapor infiltration processes. In order to retain geometric fidelity and generate flaw-free microstructures, volumetric and gravimetric changes during the polymer-to-ceramic conversion must be quantified. To this end, we present x-ray micro-computed tomography (micro-CT) measurements of the dimensional stability and uniformity of additively manufactured silicon-based ceramics as a function of geometry and processing conditions. |
| Databáze: | OpenAIRE |
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