Talks and Poster Presentations (with Proceedings-Entry):
T. Konegger, A. Liersch, R. Felzmann:
"Influence Of Oxide Ceramic Fillers On Mechanical Characteristics Of Polysilazane-derived Ceramic Materials";
Poster: 2nd International Congress On Ceramics,
Verona;
06-29-2008
- 07-04-2008; in: "2nd International Congress On Ceramics GLOBAL ROADMAP FOR CERAMICS & ICC2 - PROCEEDINGS",
ISTEC-CNR,
(2008),
ISBN: 978-88-8080-084-2;
Paper ID 3-P-10,
6 pages.
English abstract:
The influence of oxide ceramic fillers on characteristics of a precursor-derived ceramic material was investigated. A commercially available liquid polysilazane was used as a binder, in which particulate partially stabilized zirconia and zirconia-toughened alumina were dispersed.
After thermal curing, the samples were pyrolyzed and sintered at temperatures from 1100 till 1400 °C. Methods of characterization included ceramography, XRD, and determination of microhardness by the Vickers method. Compact, crack-free samples with densities up to 94 % of the theoretical value could be produced. The formation of gradient structures at the sample surface could be observed at temperatures exceeding 1300°C. Depending on pyrolysis temperature and composition, a maximum Vickers hardness of 1100 HV0,5 (10,8 GPa) could be measured.
Keywords:
precursor ceramics, oxide ceramic filler, Al2O3, ZrO2, machinability