Cellular Nickel-Yttria/Zirconia (Ni–YSZ) Cermet Foams: Manufacturing, Microstructure and Properties
Open-celled ceramic composite foams were prepared from NiO and yttria-stabilized zirconia (YSZ) powders by the polymer sponge replication (Schwartzwalder) technique using the respective aqueous dispersions. Mechanically stable NiO–YSZ foams with an average porosity of 93 vol.% were obtained. After c...
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2020-05-01
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| Online Access: | https://www.mdpi.com/1996-1944/13/11/2437 |
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| author | Ulf Betke Katja Schelm Andreas Rodak Michael Scheffler |
| author_facet | Ulf Betke Katja Schelm Andreas Rodak Michael Scheffler |
| author_sort | Ulf Betke |
| collection | DOAJ |
| description | Open-celled ceramic composite foams were prepared from NiO and yttria-stabilized zirconia (YSZ) powders by the polymer sponge replication (Schwartzwalder) technique using the respective aqueous dispersions. Mechanically stable NiO–YSZ foams with an average porosity of 93 vol.% were obtained. After chemical reduction of the NiO phase with hydrogen, cellular Ni–YSZ cermet structures were obtained. They are characterized by an electric conductivity up to 19∙10<sup>3</sup> S∙m<sup>−1</sup> which can be adjusted by both, the Ni volume fraction, and the sintering/reduction procedure. The NiO–YSZ ceramic foams, as well as the cellular Ni–YSZ cermets prepared therefrom, were characterized with respect to their microstructure by scanning electron microscopy, confocal Raman microscopy and X-ray diffraction with Rietveld analysis. In addition, the compressive strength, the electric conductivity and the thermal conductivity were determined. The collected data were then correlated to the sample microstructure and porosity and were also applied for modelling of the mechanical and electric properties of the bulk Ni–YSZ strut material. |
| first_indexed | 2024-03-10T19:35:22Z |
| format | Article |
| id | doaj.art-176fe17a952f453981cfa08fc9a40e7a |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T19:35:22Z |
| publishDate | 2020-05-01 |
| publisher | MDPI AG |
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| spelling | doaj.art-176fe17a952f453981cfa08fc9a40e7a2023-11-20T01:44:52ZengMDPI AGMaterials1996-19442020-05-011311243710.3390/ma13112437Cellular Nickel-Yttria/Zirconia (Ni–YSZ) Cermet Foams: Manufacturing, Microstructure and PropertiesUlf Betke0Katja Schelm1Andreas Rodak2Michael Scheffler3Institute for Materials and Joining Technology-Nonmetallic Inorganic Materials and Composites, Otto-von-Guericke-University Magdeburg, Große Steinernetischstraße 6, 39104 Magdeburg, GermanyInstitute for Materials and Joining Technology-Nonmetallic Inorganic Materials and Composites, Otto-von-Guericke-University Magdeburg, Große Steinernetischstraße 6, 39104 Magdeburg, GermanyInstitute for Materials and Joining Technology-Nonmetallic Inorganic Materials and Composites, Otto-von-Guericke-University Magdeburg, Große Steinernetischstraße 6, 39104 Magdeburg, GermanyInstitute for Materials and Joining Technology-Nonmetallic Inorganic Materials and Composites, Otto-von-Guericke-University Magdeburg, Große Steinernetischstraße 6, 39104 Magdeburg, GermanyOpen-celled ceramic composite foams were prepared from NiO and yttria-stabilized zirconia (YSZ) powders by the polymer sponge replication (Schwartzwalder) technique using the respective aqueous dispersions. Mechanically stable NiO–YSZ foams with an average porosity of 93 vol.% were obtained. After chemical reduction of the NiO phase with hydrogen, cellular Ni–YSZ cermet structures were obtained. They are characterized by an electric conductivity up to 19∙10<sup>3</sup> S∙m<sup>−1</sup> which can be adjusted by both, the Ni volume fraction, and the sintering/reduction procedure. The NiO–YSZ ceramic foams, as well as the cellular Ni–YSZ cermets prepared therefrom, were characterized with respect to their microstructure by scanning electron microscopy, confocal Raman microscopy and X-ray diffraction with Rietveld analysis. In addition, the compressive strength, the electric conductivity and the thermal conductivity were determined. The collected data were then correlated to the sample microstructure and porosity and were also applied for modelling of the mechanical and electric properties of the bulk Ni–YSZ strut material.https://www.mdpi.com/1996-1944/13/11/2437cellular materialceramic foamceramic metal composite (cermet)nickel-yttria-stabilized zirconiaNi-ZrO<sub>2</sub>-Y<sub>2</sub>O<sub>3</sub> (Ni–YSZ)chemical reduction |
| spellingShingle | Ulf Betke Katja Schelm Andreas Rodak Michael Scheffler Cellular Nickel-Yttria/Zirconia (Ni–YSZ) Cermet Foams: Manufacturing, Microstructure and Properties Materials cellular material ceramic foam ceramic metal composite (cermet) nickel-yttria-stabilized zirconia Ni-ZrO<sub>2</sub>-Y<sub>2</sub>O<sub>3</sub> (Ni–YSZ) chemical reduction |
| title | Cellular Nickel-Yttria/Zirconia (Ni–YSZ) Cermet Foams: Manufacturing, Microstructure and Properties |
| title_full | Cellular Nickel-Yttria/Zirconia (Ni–YSZ) Cermet Foams: Manufacturing, Microstructure and Properties |
| title_fullStr | Cellular Nickel-Yttria/Zirconia (Ni–YSZ) Cermet Foams: Manufacturing, Microstructure and Properties |
| title_full_unstemmed | Cellular Nickel-Yttria/Zirconia (Ni–YSZ) Cermet Foams: Manufacturing, Microstructure and Properties |
| title_short | Cellular Nickel-Yttria/Zirconia (Ni–YSZ) Cermet Foams: Manufacturing, Microstructure and Properties |
| title_sort | cellular nickel yttria zirconia ni ysz cermet foams manufacturing microstructure and properties |
| topic | cellular material ceramic foam ceramic metal composite (cermet) nickel-yttria-stabilized zirconia Ni-ZrO<sub>2</sub>-Y<sub>2</sub>O<sub>3</sub> (Ni–YSZ) chemical reduction |
| url | https://www.mdpi.com/1996-1944/13/11/2437 |
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