Qualitative and quantitative analysis of the process chain: Wood polymer composite – C-template – C/Si/SiC-ceramic by means of X-ray computed tomography

Bernhard Plank, Sascha Senck, Christian Fürst, Hannes Scharleitner, Johann Kastner

Research output: Chapter in Book/Report/Conference proceedingsConference contributionpeer-review

Abstract

The quality of a ceramic is defined by its homogenous and non-porous volume. These parameters determine the durability and failure probability of a component. By means of XCT, the structural changes within the samples over the whole manufacturing route were evaluated. In the qualitative evaluation at lower XCT resolutions (> (70 µm)³ voxel size) pores, cracks, and higher- and lower dense inclusions were compared within and between corresponding samples. Cracks in the wood polymer composite (WPC) tend to shrink in the C-template during carbonisation. In some WPCs no big cracks were visible while in the C-templates big cracks appeared due to carbonising and shrinkage – but these cracks are fully closed in the ceramic after the Si infiltration-step. For quantitative analysis of phase composition, high resolution XCT-measurements between (0.8 µm)³ and (3 µm)³ voxel size were applied. Due to the fact, that the absorption contrast between the wood and polymer matrix in the WPC and contrast between Si / SiC and C / Air in the ceramic is very limited, this quantification step is very challenging. For the C-templates, applying a simple threshold algorithm, the quantification by XCT leads to promising results and fits well to LOM and mercury porosimetry. With SEM/EDS higher dense inclusions, visible in XCT, were analyesed and mainly consist of the elements C-O and trace amounts of, for example, Fe, Zn, Si or Mg.
Original languageEnglish
Title of host publicationProceedings of Conference on Industrial Computed Tomography (iCT2014)
PublisherShaker Verlag
Pages55-62
DOIs
Publication statusPublished - 2014
EventConference on Industrial Computed Tomography 2014 (iCT2014) - Wels, Austria
Duration: 25 Feb 201428 Feb 2014
http://www.3dct.at/cms2/index.php/en/welcome

Conference

ConferenceConference on Industrial Computed Tomography 2014 (iCT2014)
CountryAustria
CityWels
Period25.02.201428.02.2014
Internet address

Keywords

  • Ceramic
  • WPC
  • C-template
  • X-ray Computed Tomography
  • Mercury porosimetry
  • SEM

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