Publications de Lorenz Hagelüken

Tomographic microscopy of functionally graded polymer-derived SiCN ceramics with tunable gradients

Polymer-derived ceramics (PDCs) are a very attractive class of materials due to their excellent properties such as resistance to high temperatures and harsh environments, adjustability of mechanical and functional behavior, and compatibility with a broad r ...

Elsevier Sci Ltd2024

Tomographic Volumetric Additive Manufacturing of Silicon Oxycarbide Ceramics

Jürgen Brugger, Christophe Moser, Damien Claude-Marie Loterie, Max Kollep, Paul Delrot, Georgia Konstantinou, Lorenz Hagelüken, Jorge Andres Madrid Wolff, Antoine Vincent Boniface

Ceramics are highly technical materials with properties of interest for multiple industries. Precisely because of their high chemical, thermal, and mechanical resistance, ceramics are difficult to mold into complex shapes. A possibility to make convoluted ...

2022

Multiscale microshaping of functionally graded polymer-derived SiCN ceramics

Lorenz Hagelüken

Polymer-derived ceramics (PDCs) exhibit excellent properties and are compatible with many shaping techniques due to the liquid character of the preceramic polymers (PCPs). Furthermore, their properties are adjustable by modifying the precursor composition ...

EPFL2022

Multiscale 2D/3D microshaping and property tuning of polymer-derived SiCN ceramics

Jürgen Brugger, Lorenz Hagelüken

Polymer-derived ceramics exhibit excellent properties and are compatible with many shaping techniques due to their liquid precursors. We present a fast and pressureless process for the fabrication of SiCN. Using varied amounts of the filler divinyl benzene ...

2021

Additive micro-manufacturing of crack-free PDCs by two-photon polymerization of a single, low-shrinkage preceramic resin

Helena Van Swygenhoven, Jürgen Brugger, Demetri Psaltis, Christophe Moser, Nikolaos Nianias, Eirini Kakkava, Georgia Konstantinou, Lorenz Hagelüken, Jieping Wang

Additive manufacturing (AM) methods are being integrated in ceramics fabrication either as the main manufacturing tool or for auxiliary purposes. By using polymers, powders and preceramic formulated materials, AM techniques are pushing towards higher resol ...

2020

Electrochemical performance of polymer-derived SiOC and SiTiOC ceramic electrodes for artificial cardiac pacemaker applications

Jürgen Brugger, Fatemeh Navaee, Lorenz Hagelüken, Jongmoon Jang

In an implantable electrode, such as a pacemaker electrode, fibrotic tissue formation due to a foreign body reaction is an important challenge affecting the efficiency to transmit the electrical signal of the device. The chemical inertness, biocompatibilit ...

2020