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Ceramic phononic crystals with MHz-range frequency band gaps
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SYSNO ASEP 0503484 Document Type C - Proceedings Paper (int. conf.) R&D Document Type The record was not marked in the RIV Title Ceramic phononic crystals with MHz-range frequency band gaps Author(s) Koller, M. (CZ)
Kruisová, Alena (UT-L) RID
Seiner, Hanuš (UT-L) RID, ORCID
Sedlák, Petr (UT-L) RID, ORCID
Grabec, Tomáš (UJF-V) ORCID
Román-Manso, B. (US)
Miranzo, P. (ES)
Belmonte, M. (ES)
Landa, Michal (UT-L) RIDNumber of authors 9 Number of pages 5 s. Action International Congress on Ultrasonics : 2017 ICU Honolulu /6./ Event date 18.12.2017 - 20.12.2017 VEvent location Honolulu Country US - United States Event type WRD Language eng - English Subject RIV BI - Acoustics OECD category Applied mechanics R&D Projects GA17-01618S GA ČR - Czech Science Foundation (CSF) Institutional support UT-L - RVO:61388998 DOI 10.1121/2.0000690 Annotation Robocasting is an additive manufacturing method, which is capable of fabricating microarchitectured scaffolds, consisting of periodically repeating thin ceramic rods in various spatial arrangements. Fully sintered ceramic scaffolds are obtained by a combination of layer-by-layer 3D printing and subsequent presureless spark plasma sintering of the printed green ceramic bodies. Due to the complex structures with easily tunable geometric parameters, phononic crystals can be fabricated by the robocasting method. In this contribution, elastic and acoustic properties of the robocast silicon carbide scaffold are shown, utilizing a combination of resonant ultrasound spectroscopy measurement and finite element modeling. The scaffold is highly anisotropic in elastic properties, which leads to a strong acoustic energy focusing along the principal axes of the silicon carbide rods. Moreover, frequency band gaps in MHz range are detected by measur-ing longitudinal wave transmission, which is compared with a theoretical prediction by the finite element modeling. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2019
Number of the records: 1