Mechnich, Peter und Flucht, Ferdinand und Schmücker, Martin (2017) Manufacturing of porous mullite fiber compacts by uniaxial hot pressing of semicrystalline MAFTEC® MLS-2 organic bound mats. Journal of Materials Research, 32 (17), Seiten 3294-3301. Cambridge University Press. doi: 10.1557/jmr.2017.236. ISSN 0884-2914.
![]() |
PDF
719kB |
Offizielle URL: https://doi.org/10.1557/jmr.2017.236
Kurzfassung
Highly porous and fully crystalline mullite fiber compacts were fabricated by uniaxial hot pressing of stacked short-fiber mats without binders or sintering aids. The special feature of this new fabrication method is the use of MAFTEC organic bound mat (OBM) type fiber mats consisting of semicrystalline MLS-2 short fibers. In contrast to conventional polycrystalline mullite fibers, semicrystalline MLS-2 fibers consist of amorphous silica and nanoscale transitional alumina. Due to this special microstructure, MLS-2 fibers are less prone to fiber breakage upon shear load and therefore can well withstand pressure-assisted consolidation. Hot pressing of stacked OBM to highly porous fiber compacts is facilitated by the thermally driven softening of amorphous silica above 900 °C; favorable deformation and consolidation rates are achieved above 1050 °C. Above 1250 °C the mullite is crystallized at the expense of amorphous silica and simultaneously both deformation and consolidation comes to an end. Obtained MAFTEC OBM-derived fiber compacts consist only of crystalline mullites, and therefore mechanical properties are favorably retained at high temperatures.
elib-URL des Eintrags: | https://elib.dlr.de/115904/ | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||
Titel: | Manufacturing of porous mullite fiber compacts by uniaxial hot pressing of semicrystalline MAFTEC® MLS-2 organic bound mats | ||||||||||||||||
Autoren: |
| ||||||||||||||||
Datum: | 14 September 2017 | ||||||||||||||||
Erschienen in: | Journal of Materials Research | ||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||
Open Access: | Ja | ||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||
In ISI Web of Science: | Ja | ||||||||||||||||
Band: | 32 | ||||||||||||||||
DOI: | 10.1557/jmr.2017.236 | ||||||||||||||||
Seitenbereich: | Seiten 3294-3301 | ||||||||||||||||
Verlag: | Cambridge University Press | ||||||||||||||||
ISSN: | 0884-2914 | ||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||
Stichwörter: | Mullite, Fiber Compact, Hot-Press | ||||||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||
HGF - Programm: | Luftfahrt | ||||||||||||||||
HGF - Programmthema: | Antriebssysteme | ||||||||||||||||
DLR - Schwerpunkt: | Luftfahrt | ||||||||||||||||
DLR - Forschungsgebiet: | L ER - Engine Research | ||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | L - Brennkammertechnologien (alt) | ||||||||||||||||
Standort: | Köln-Porz | ||||||||||||||||
Institute & Einrichtungen: | Institut für Werkstoff-Forschung > Struktur- und Funktionskeramik | ||||||||||||||||
Hinterlegt von: | Mechnich, Dr.rer.nat. Peter | ||||||||||||||||
Hinterlegt am: | 23 Nov 2017 11:23 | ||||||||||||||||
Letzte Änderung: | 02 Nov 2023 13:22 |
Nur für Mitarbeiter des Archivs: Kontrollseite des Eintrags