Macroporous polymer-derived ceramics produced by standard and additive manufacturing methods: How the shaping technique can affect their high temperature thermal behavior
Andrea Zambotti,
Apoorv Kulkarni,
Tugce Semerci,
Cekdar Vakifahmetoglu,
Marco Pelanconi,
Samuele Bottacin,
Riccardo Balzarotti,
Alberto Ortona,
Gian Domenico Sorarù
Affiliations
Andrea Zambotti
Department of Industrial Engineering, Glass & Ceramics Laboratory, University of Trento, Via Sommarive 9, 38123, Trento, Italy
Apoorv Kulkarni
Department of Industrial Engineering, Glass & Ceramics Laboratory, University of Trento, Via Sommarive 9, 38123, Trento, Italy
Tugce Semerci
Department of Materials Science and Engineering, Izmir Institute of Technology, 35430, Izmir, Turkey
Cekdar Vakifahmetoglu
Department of Materials Science and Engineering, Izmir Institute of Technology, 35430, Izmir, Turkey
Marco Pelanconi
Hybrid Materials Laboratory, MEMTi, DTI, SUPSI, Polo Universitario Lugano - Campus Est, Via La Santa 1, CH-6962, Lugano, Viganello, Switzerland
Samuele Bottacin
Hybrid Materials Laboratory, MEMTi, DTI, SUPSI, Polo Universitario Lugano - Campus Est, Via La Santa 1, CH-6962, Lugano, Viganello, Switzerland
Riccardo Balzarotti
Hybrid Materials Laboratory, MEMTi, DTI, SUPSI, Polo Universitario Lugano - Campus Est, Via La Santa 1, CH-6962, Lugano, Viganello, Switzerland
Alberto Ortona
Hybrid Materials Laboratory, MEMTi, DTI, SUPSI, Polo Universitario Lugano - Campus Est, Via La Santa 1, CH-6962, Lugano, Viganello, Switzerland
Gian Domenico Sorarù
Department of Industrial Engineering, Glass & Ceramics Laboratory, University of Trento, Via Sommarive 9, 38123, Trento, Italy
This work proposes the processing of porous ceramic lattices via three polymer-derived ceramic routes, namely powder bed fusion and infiltration, fused filament fabrication and replica, and a direct replica of a foamed polymer. A common feature in the processing of these lattices is the use of the same polysilazane as the preceramic source for the Si-C-N-O network that builds up during ceramization.We adopted rotated cube, honeycomb and randomized cellular geometries as a matter of comparison for thermal exchange when an air flow is forced through the structures up to 1050 °C. The three procedural pathways are discussed in their limitations regarding geometry, polymer-to-ceramic conversion, high-temperature heat exchange performance and durability. In this regard, while rotated cube geometry results in the best thermal exchange and highest pressure drop, we show a correlation between chemical composition and high temperature oxidation of the Si-C-N-O network, possibly attributed to the selection of the processing routes.
