Low-temperature oxidation-induced crack healing in Ti2Al0.5Sn0.5C–Al2O3 composites

Journal article
(Original article)


Publication Details

Author(s): Bei G, Mackovic M, Spiecker E, Greil P
Journal: International Journal of Applied Ceramic Technology
Publication year: 2019
Volume: 16
Journal issue: 5
Pages range: 1744-1751
ISSN: 1546-542X
eISSN: 1744-7402
Language: English


Abstract

The oxidation-induced crack healing of an Al2O3 composite loaded with various volume fractions of Ti2Al0.5Sn0.5C repair filler particles was investigated by annealing in air at a relatively low temperature of 700°C. After annealing a composite with 20 vol.% repair fillers (with a particle size of ~5.6 µm) for 48 hours, artificial indentation cracks prepared on the surface, as well as pores near the surface, were completely healed by filling with condensed oxidation products. Additionally, minor fraction of metallic Sn was detected. A complementary study by X-ray diffraction, transmission electron microscopy, scanning electron microscopy, and energy dispersive X-ray spectroscopy revealed that nano-sized oxidation products (SnO2, TiO2, and α-Al2O3 phase) were formed as major crack-filling species. After healing, the strength recovery of the Al2O3 composites was significantly improved in the composites loaded with more than 10 vol.% repair fillers and achieved 107% at 700 for 48 hours.


FAU Authors / FAU Editors

Bei, Guoping Dr.
Lehrstuhl für Werkstoffwissenschaften (Glas und Keramik)
Greil, Peter Prof. Dr.
Lehrstuhl für Werkstoffwissenschaften (Glas und Keramik)
Mackovic, Mirza Dr.-Ing.
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)
Spiecker, Erdmann Prof. Dr.
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)


Additional Organisation
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)
Graduiertenkolleg 1896/2 In situ Mikroskopie mit Elektronen, Röntgenstrahlen und Rastersonden
Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)


How to cite

APA:
Bei, G., Mackovic, M., Spiecker, E., & Greil, P. (2019). Low-temperature oxidation-induced crack healing in Ti2Al0.5Sn0.5C–Al2O3 composites. International Journal of Applied Ceramic Technology, 16(5), 1744-1751. https://dx.doi.org/10.1111/ijac.13315

MLA:
Bei, Guoping, et al. "Low-temperature oxidation-induced crack healing in Ti2Al0.5Sn0.5C–Al2O3 composites." International Journal of Applied Ceramic Technology 16.5 (2019): 1744-1751.

BibTeX: 

Last updated on 2019-18-09 at 12:53