TY - GEN A1 - Paulick, C. T1 - Dicplacement Behavior of Ceramic Springs N2 - Due to the promising combination of chemical, thermal and mechanical properties, springs made of advanced ceramics have attracted much attention as a replacement for metal springs in highly demanding applications, operating at high temperatures and in harsh environments when hardened metals can no longer be used. A further application was recently proposed by using ceramic springs with metalized surfaces as capacitive force sensors. Prior to any design of an instrument, application-specific static and/or dynamic loading experiments are necessary to investigate the stability of spring properties under the given conditions. These experiments can also be used to determine seldom measured material properties like the shear modulus of ceramics. Helical Springs with a rectangular cross-section have been machined from straight tubes of alumina (99.99% α-AI203,) and zirconia (Y/Ce-TZP). The sintered density of both materials was above 99% of the theoretical density. The stress/displacement curves turned out to be extremely linear and the spring constants were not altered, even after more than one million cycles of compression loading at various temperatures from -15°C to +60°C. This means that such springs can be a far more reproducible and reliable source of an elastic response to applied forces than handmade springs from molten quartz wires. The behavior found for in-house fabricated springs contrasts to the behavior found for a commercial ceramic spring, which was produced by injection molding and exhibits a less linear response. Furthermore, high-temperature displacement behavior of fabricated alumina and zirconia springs was tested under static loading conditions in different atmospheres (air, N2 and H2) at temperatures up to 1000 °C. T2 - Jahrestagung der Deutschen Keramischen Gesellschaft CY - Berlin, Germany DA - 19.03.2017 KW - High-temperature behavior KW - Ceramic springs KW - Sensor PY - 2017 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/41085 AN - OPUS4-41085 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany