Cracks, porosity and microstructure of Ti modified polymer-derived SiOC revealed by absorption-, XRD- and XRF-contrast 2D and 3D imaging

Makowska, Małgorzata; Sasikumar, Pradeep Vallachira Warriam; Hagelüken, Lorenz; Ferreira Sanchez, Dario; Casati, Nicola; Marone, Federica; Blugan, Gurdial; Brugger, Jürgen; Van Swygenhoven, Helena

doi:10.1016/j.actamat.2020.07.067

Cracks, porosity and microstructure of Ti modified polymer-derived SiOC revealed by absorption-, XRD- and XRF-contrast 2D and 3D imaging

Makowska M, Sasikumar PVW, Hagelüken L, Ferreira Sanchez D, Casati N, Marone F, Blugan G, Brugger J & Van Swygenhoven H

Citation

Makowska, M., Sasikumar, P. V. W., Hagelüken, L., Ferreira Sanchez, D., Casati, N., Marone, F., … Van Swygenhoven, H. (2020). Cracks, porosity and microstructure of Ti modified polymer-derived SiOC revealed by absorption-, XRD- and XRF-contrast 2D and 3D imaging. Acta Materialia, 198, 134-144. https://doi.org/10.1016/j.actamat.2020.07.067

Persistent URL https://www.dora.lib4ri.ch/psi/islandora/object/psi:33859

Morphology, phase composition, cracks and porosity are investigated in monolithic Ti modified SiOC polymer-derived ceramics pyrolyzed at 1000°C and 1400°C using synchrotron X-ray full field absorption-contrast tomographic microscopy and scanning XRF- and XRD-contrast microscopy. Samples pyrolyzed at 1000°C show a crack-free structure, but pyrolysis at 1400°C results in formation of cracks and at higher Ti content also shows porosity. Tomography revealed the formation of a layered morphology that varies in terms of crystallographic structure and/or Ti stoichiometric concentration. The microstructural observations and electrical conductivity are discussed in terms of pyrolysis temperature and Ti content.

Details

Publication Type

Journal Article

Title

Cracks, porosity and microstructure of Ti modified polymer-derived SiOC revealed by absorption-, XRD- and XRF-contrast 2D and 3D imaging

Author(s)

Makowska, Małgorzata (6317 Photons for Engineering and Manufacturing)

Sasikumar, Pradeep Vallachira Warriam

Hagelüken, Lorenz

Ferreira Sanchez, Dario (6412 microXAS)

Casati, Nicola (6311 Material Science)

Marone, Federica (6111 X-ray Tomography)