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

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  
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August 1, 2020
Acta Materialia

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.

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Type
research article
DOI
10.1016/j.actamat.2020.07.067
Author(s)
Makowska, Małgorzata
Sasikumar, Pradeep Vallachira Warriam
Hagelüken, Lorenz  
Sanchez, Dario F.
Casati, Nicola
Marone, Federica
Blugan, Gurdial
Brugger, Jürgen
Van Swygenhoven, Helena  
Date Issued

2020-08-01

Published in
Acta Materialia
Volume

198

Start page

134

End page

144

Subjects

Polymer-derived ceramics

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Ti modified SiOC

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Tomographic microscopy

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Chemical imaging

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Diffraction contrast imaging

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Ceramics

Editorial or Peer reviewed

REVIEWED

Written at

OTHER

EPFL units
LMIS1  
Available on Infoscience
August 4, 2020
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/170562
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