Publication
Processing and Consolidation of TaC/HfC Based Composites Using MoSi2 and Carbon Nanotubes
Related publications (46)
Density and phase-purity of α-TCP obtained by sintering of nano-crystalline powder
Andrea Testino, Christoph Stähli
Dense and polished samples are sometimes used to test the in vitro biological response of biomaterials. However, their production can be challenging, for example for α-tricalcium phosphate (α-TCP), a commonly-used bone graft substitute. In this particular ...
2024Multiscale microshaping of functionally graded polymer-derived SiCN ceramics
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 ...
EPFL2022Atomic scale investigations of fracture in metal alloys
The demand for metal alloys with superior structural performance in industrial applications continues to increase, as does the need for more-energy efficient materials and methods. Many materials that are otherwise attractive for structural applications ar ...
EPFL2021Heterogeneous Dynamic Fracture: Amplitude Scaling of Crack Front Deformations
Jean-François Molinari, Thibault Didier Roch, Mathias Alexandre David Lebihain
We study numerically the deformation of a dynamic crack propagating through a planar heterogeneous interface. We investigate the evolution of the front shape due to variations of fracture toughness, represented by weak and strong stripes parallel to the ru ...
2021Intrinsic fracture behavior of Mg-Y alloys
William Curtin, Eleanor Yi Kei Mak
Pure magnesium (Mg) is an attractive metal for structural applications due to its low density, but also has low ductility and low fracture toughness. Dilute alloying of Mg with rare earth elements in small amounts improves the ductility, but the effects of ...
2020Electrical Conductivity Tuning of Polysilazane-Derived Silicon Carbonitride Ceramics
Polymer-derived ceramics (PDCs) are a promising alternative to powder-sintered ceramics because starting from liquid precursors allows compositional modification by adding functional fillers and shaping with high precision using microfluidics. Here, we pre ...
2020Fracture of thin-ply composites
The demand for carbon/epoxy laminated composites is continuously increasing due to their high specific modulus and strength. Among them, laminates made of particularly thin layers (from t=0.015 to 0.150 mm) and called thin-ply composites are gaining in int ...
EPFL2017Comparison of apparent activation energies for densification of alumina powders by pulsed electric current sintering (spark plasma sintering) and conventional sintering-toward applications for transparent polycrystalline alumina
Paul Bowen, Michael Stuer, Zhe Zhao, Claude Paul Carry
In the quest for high real in-line transmittances for transparent polycrystalline alumina (PCA), we need defect free processing. One of the biggest advances in producing high density defect free ceramics over recent years has been the advent of spark plasm ...
Materials Research Society2017Fracture toughness testing of nanocrystalline alumina and fused quartz using chevron-notched microbeams
Andreas Mortensen, Marco Cantoni, Goran Zagar, Martin Guillermo Mueller, Václav Pejchal
We show that chevron-notched samples offer an attractive approach to the measurement of fracture toughness in micron-scale samples of brittle materials and use the method to characterize quartz and nanocrystalline alumina. Focused ion beam milling is used ...
Elsevier2015Failure of Ceramic Composites in Non-Uniform Stress Fields
Continuous-fiber ceramic matrix composites (CMCs) are of interest as hot-section components in gas turbine engines due to their refractoriness and low density relative to metallic alloys. In service, CMCs will be subjected to spatially inhomogeneous temper ...
University of California Santa Barbara2014