Herskind, P., Dantan, A., Langkilde-Lauesen, M. B., Mortensen, A., Sorensen, J. L., Drewsen, M.
We report on the loading of large ion Coulomb crystals into a linear Paul trap incorporating a high-Finesse optical cavity (F~3200). We show that, even though the 3-mm diameter dielectric cavity...
Fracture behavior of low-density replicated aluminum alloy foams (2008)
Amsterdam, E., Goodall, R., Mortensen, A., Onck, P. R.
Tensile tests have been performed on replicated aluminum alloy foams of relative density between 4.5% and 8%. During the test the electrical resistance was measured with a four-point set-up and the...
Direct measurement of drainage curves in infiltration of SiC particle preforms (2008)
Bahraini, M., Molina, J. M., Weber, L., Mortensen, A.
Drainage curves (plots of the non-wetting fluid saturation versus applied pressure) for infiltration of SiC particle preforms with Al and Al-12.2 at.% Si are measured at 1023 K (750 degrees C) with a...
Equilibrium shape of a liquid intergranular inclusion in a stressed elastic solid (2008)
Felberbaum, L., Laporte, V., Mortensen, A.
The influence of applied stress on the equilibrium shape of a liquid intergranular inclusion is derived to show that (i) results differ significantly from those for a void, and (ii) this difference...
High-temperature wettability of aluminum nitride during liquid metal infiltration (2008)
Kida, M., Bahraini, M., Molina, J. M., Weber, L., Mortensen, A.
The high-temperature wettability of AlN particle preforms with pure molten Cu, Al and Ph is quantified by means of drainage curves measured during pressure infiltration. By integrating the drainage...
Coordination measurements in compacted NaCl irregular powders using X-ray microtomography (2008)
Marmottant, A., Salvo, L., Martin, C. L., Mortensen, A.
X-ray microtomography and three-dimensional (3D) image analysis are used to quantify the structural evolution during cold isostatic compaction of two irregularly shaped NaCl powders having different...
Molina, J. M., Bahraini, M., Weber, L., Mortensen, A.
We present dynamic measurement of drainage curves in two systems having relevance to metal matrix composite processing, namely SiC/Al and SiC/Al-12.2at%Si. Data show that liquid/solid chemical...
Molina, J. M., Narciso, J., Weber, L., Mortensen, A., Louis, E.
The thermal conductivity of aluminum matrix composites having a high volume fraction of SiC particles is investigated by comparing data for composites fabricated by infiltrating liquid aluminum into...
Tensile flow stress of ceramic particle-reinforced metal in the presence of particle cracking (2008)
Mueller, R., Rossoll, A., Weber, L., Bourke, M. A. M., Dunand, D. C., Mortensen, A.
A simplified model is proposed to quantity the effect of damage in the form of particle cracking on the elastic and plastic behaviour of particle-reinforced metal matrix composites under uniaxial...
Rossoll, A., Otto, C., Moser, B., Weber, L., Wanner, A., Mortensen, A.
Internal damage in uniaxial continuous alumina fibre-reinforced aluminium is measured by acoustic emission during tensile straining in the fibre direction. Over most of the loading history spatially...
Microcellular aluminium? Child's play! (2007)
An innovation (patent pending) in the NaCl-based replication process for the manufacture of microcellular aluminium is presented that overcomes the limitations with the conventional method regarding...
Infiltration of graphite preforms with Al-Si eutectic alloy and mercury (2007)
Molina, J. M., RodrÌguez-Guerrero, A., Bahraini, M., Weber, L., Narciso, J., RodrÌguez-Reinoso, F., ...
Sintering of NaCl powder: Mechanisms and first stage kinetics (2006)
Goodall, R., Despois, J. F., Mortensen, A.
Isothermal NaCl sintering experiments are conducted between 500 and 790 degrees C on powders 75, 100, 150 and 400 mu m in average diameter. Along with literature data, the results are compared with...
The electrical conductivity of microcellular metals (2006)
Goodall, R., Weber, L., Mortensen, A.
The electrical conductivity of metallic foams varies strongly with porosity. Data are presented for replicated open-pore microcellular metal over a wide range of relative density. These data,...
Measuring and tailoring capillary forces during liquid metal infiltration (2005)
Bahraini, M., Molina, J. M., Kida, M., Weber, L., Narciso, J., Mortensen, A.
A new technique is proposed for the direct measurement of capillary forces in systems of relevance to the infiltration processing of metal matrix composites. Capable of handling melt temperatures up...
Rossoll, A., Moser, B., Mortensen, A.
A computational analysis of the longitudinal deformation of continuous fibre reinforced metals is presented. Elastic and elastic-plastic matrix behaviour are considered. Analytical approaches are...
Al-Cu matrix composites with a high volume fraction of alumina particles (41-62%) prepared by gas-pressure infiltration are characterized in tension and chevron-notch fracture testing before and...
Wetting, interfacial interactions and sticking in glass/steel systems (2004)
Pech, J., Braccini, M., Mortensen, A., Eustathopoulos, N.
Wetting and sticking of soda-lime glass on two types of stainless steel as well as on platinum and vitreous carbon substrates are studied in a neutral gas atmosphere between 860 and 1200degreesC....
Transmitted light microscopy of a fibre reinforced metal (2003)
Moser, B., Rossoll, A., Weber, L., Beffort, O., Mortensen, A.
A method is presented for studying fibre damage in continuous fibre reinforced composites. It is based on contrasting the transmission of light through intact translucent fibres with the light...
Kouzeli, M., Weber, L., March, S. C., Mortensen, A.
Particle reinforced composites are produced by infiltrating ceramic particle beds with 99.99% Al. Resulting materials feature a relatively high volume fraction (40-55 vol. pet) of homogeneously...
Infiltration processing of fibre reinforced composites: governing phenomena (2001)
All three classes of fibre reinforced composite materials (polymer, metal and ceramic matrix) may be produced by flow of liquid matrix into the open spaces left within pores of a fibre preform. Even...