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Strategies for the selective volume sintering of ceramics

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Abstract

The present study is dealing with the basic physics for a novel way to generate a free-formed ceramic body, not like common layer by layer, but directly by Selective Volume Sintering (SVS) in a compact block of ceramic powder. To penetrate with laser light into the volume of a ceramic powder compact it is necessary to investigate the light scattering properties of ceramic powders. Compared with polymers and metals, ceramic materials are unique as they offer a wide optical window of transparency. The optical window typically ranges from below 0.3 up to 5 µm wave length. In the present study thin layers of quartz glass (SiO2) particles have been prepared. As a function of layer thickness and the particle size, transmission and reflection spectra in a wave length range between 0.5 and 2.5 µm have been recorded. Depending on the respective particle size and by choosing a proper relation between particle size and wave length of the incident laser radiation, it is found that light can penetrate a powder compact up to a depth of a few millimeters. With an adjustment of the light absorption properties of the compact the initiation of sintering in the volume of the compact is possible.

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Authors and Affiliations

  1. Institute of Nonmetallic Materials, Clausthal University of Technology, Clausthal-Zellerfeld, 38678, Germany

    Thomas Mühler, Gundula Helsch, Jürgen G. Heinrich & Jens Günster

  2. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China

    Dongxu Yao

  3. Otto-Schott Institute of Materials Research, Friedrich-Schiller University of Jena, Jena, 07743, Germany

    Stephan Gräf & Frank A. Müller

  4. Division of Ceramic Processing and Biomaterials, BAM Federal Institute of Materials Research and Testing, 12205, Berlin, Germany

    Jens Günster

Authors
  1. Thomas Mühler
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  2. Gundula Helsch
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  3. Jürgen G. Heinrich
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  4. Dongxu Yao
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  5. Stephan Gräf
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  6. Frank A. Müller
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  7. Jens Günster
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Correspondence to Thomas Mühler.

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Mühler, T., Helsch, G., Heinrich, J.G. et al. Strategies for the selective volume sintering of ceramics. Journal of Materials Research 29, 2095–2099 (2014). https://doi.org/10.1557/jmr.2014.174

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  • DOI: https://doi.org/10.1557/jmr.2014.174

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