Publication
Influence of processing route on electrical and thermal conductivity of Al/SiC composites with bimodal particle distribution
Publications associées (34)
Duality and bicrystals on infinite binary matrices
The set of finite binary matrices of a given size is known to carry a finite type AA bicrystal structure. We first review this classical construction, explain how it yields a short proof of the equality between Kostka polynomials and one-dimensional sums t ...
2023Multiscale 2D/3D microshaping of property-contrast polymer-derived SiCN
Jürgen Brugger, Lorenz Hagelüken
Polymer-derived ceramics are a unique class of materials known for their outstanding properties and versatile applicability. The liquid nature of the precursors allows easy addition of fillers in order to alter the resulting ceramics’ properties. We use a ...
2022In Vitro Cytocompatibility Assessment of Ti-Modified, Silicon-oxycarbide-Based, Polymer-Derived, Ceramic-Implantable Electrodes under Pacing Conditions
Jürgen Brugger, Demetri Psaltis, Giulia Panusa, Pierrick Guy Robert Clément, Eirini Kakkava, Jongmoon Jang
Polymer-derived ceramics (PDC) have recently gained increased interest in the field of bioceramics. Among PDC's, carbon-rich silicon oxycarbide ceramics (SiOC) possess good combined electrical and mechanical properties. Their durability in aggressive envir ...
AMER CHEMICAL SOC2020Convergence of the Exponentiated Gradient Method with Armijo Line Search
Consider the problem of minimizing a convex differentiable function on the probability simplex, spectrahedron, or set of quantum density matrices. We prove that the expo-nentiated gradient method with Armijo line search always converges to the optimum, if ...
2018Fast hierarchical solvers for symmetric eigenvalue problems
In this thesis we address the computation of a spectral decomposition for symmetric
banded matrices. In light of dealing with large-scale matrices, where classical dense
linear algebra routines are not applicable, it is essential to design alternative tech ...
EPFL2018Investigation of the thermal conductivity of SiC/SiC cladding before and after irradiation
Silicon carbide based composites are candidates for structural components and fuel claddings in nuclear power plants. In the frame of accident tolerant fuel research, the effective through-thickness thermal conductivity of SiC/SiC prototype claddings is in ...
EPFL2017New approach to low thermal conductivity of thermal barrier protection with improved mechanical integrity
Heinrich Hofmann, Paul Bowen, Abhishek Tewari
Layered ceramic systems with designed stacks of dense and porous layers were investigated as alternative for thermal barrier protection system (TBPs). This approach gives the possibility to obtain low thermal conductivity with the impact protection of dens ...
Elsevier2016CNT and PDCs: A fruitful association? Study of a polycarbosilane–MWCNT composite
Jürgen Brugger, Rosario Maurizio Gullo, Jonas Grossenbacher
The effect of MWCNT introduction in a polycarbosilane based ceramic on its electrical properties is presented. The electrical conductivity of two MWCNT powders was measured under dynamic compaction up to 20 MPa when it reached 3–5 S/cm. The compaction beha ...
Elsevier Sci Ltd2015Capillarity in pressure infiltration: influence of percolation and wetting angle
Andreas Mortensen, William Craig Carter, Ludger Weber, Alain Léger, Gionata Schneider
Composite materials are often produced by pressure-infiltration of a liquid matrix into a preform of packed solid fibers or particles. Capillary forces that intervene in this process are quantified by measuring saturation curves, which are plots of the fra ...
2015Influence of carbon enrichment on electrical conductivity and processing of polycarbosilane derived ceramic for MEMS applications
Jürgen Brugger, Rosario Maurizio Gullo, Jonas Grossenbacher, Markus Niederberger
An analysis about the effect of carbon enrichment of allylhydridopolycarbosilane SMP10® with divinylbenzene (DVB) as a promising material for electrical conductive micro-electrical mechanical systems (MEMS) is presented. The liquid precursors can be microp ...
Elsevier Sci Ltd2014