Unit
SCI SB DM Group
GroupRelated publications (32)
High Temperature Behavior of Nano-Structured Ceramic Composites Studied by Mechanical Spectroscopy
Silicon nitride based ceramics (SiAlONs); tetragonal polycrystalline zirconia (3Y‐TZP); alumina and their composites reinforced with different amount of multi‐ walled carbon‐nanotubes (CNTs) have been processed by Spark Plasma Sintering (SPS). High tempera ...
EPFL2013Recrystallization and grain boundary formation in an 18-carat gold alloy studied by mechanical spectroscopy
Daniele Mari, Robert Schaller, Iva Tkalcec Vâju
Heavily deformed 18-carat yellow gold samples show a recrystallization peak at 700 K during the first heating. The mechanical loss spectrum of polycrystals shows a relaxation peak at about 780 K, which is absent in single crystals made from the same alloy. ...
Trans Tech Publications Ltd2013High temperature transformations in a steel-TiCN cermet
The influence of the carbon content on the microstructure, phase transformation and hardness of an iron-based cermet is studied. The cermet is constituted by a high-alloyed steel as matrix, and TiCN particles (50 vol.%) as reinforcement. The material is pr ...
Elsevier Sci Ltd2013Grain boundary formation stages in a deformed yellow gold single crystal studied by mechanical spectroscopy
Daniele Mari, Robert Schaller, Iva Tkalcec Vâju
A monocrystalline 18-carat yellow gold sample is deformed stepwise from 2% to 12% at room temperature. The mechanical loss spectrum is recorded and analysed. At low deformations the exponential high temperature background increases. At a critical deformati ...
Elsevier Science Sa2013High Temperature Mechanical Spectroscopy Study of 3 mol% Yttria Stabilized Tetragonal Zirconia Reinforced with Carbon Nanotubes
Daniele Mari, Robert Schaller, Mehdi Mazaheri, Gilbert Fantozzi
Composites containing 3 mol% yttria stabilized tetragonal zirconia (3Y-TZP) reinforced with multiwalled carbon nanotubes (CNTs) with various amounts of CNTs (3Y-TZP / X wt% CNT, X= 0, 0.5, 1.5, 3 and 5) were processed by spark plasma sintering. Microscopic ...
Trans Tech Publications Ltd, Laublsrutistr 24, Ch-8717 Stafa-Zurich, Switzerland2012Analysis of Microstructural Changes with Temperature of Thermally Sprayed WC-Co Coatings by Mechanical Spectroscopy
Thermally sprayed hardmetal coatings can be used to improve the wear or fatigue resistance of mechanical parts. Depending on the deposition conditions, their microstructure and phase composition are out of equilibrium at different levels due to the extreme ...
Trans Tech Publications Ltd, Laublsrutistr 24, Ch-8717 Stafa-Zurich, Switzerland2012Phase Transformations in 18-Carat Gold Alloys Studied by Mechanical Spectroscopy
This work is motivated by an industrial interest in gaining a better understanding of the phase transformations that govern the mechanical properties of 18-carat gold alloys commonly used in jewelry applications and luxury watchmaking. These alloys fall in ...
EPFL2010High temperature mechanical spectroscopy of yttria stabilized zirconia reinforced with carbon nanotubes
Daniele Mari, Robert Schaller, Mehdi Mazaheri
High temperature mechanical properties of zirconia reinforced with carbon-nanotubes (CNTs) are studied by mechanical spectroscopy. CNTs limit zirconia grain-boundary sliding (GBS) and consequently deformation. Concurrent grain-growth and plastic deformatio ...
2010The effect of the orientation of the basal plane on the mechanical loss in magnesium matrix composites studied by mechanical spectroscopy
Daniele Mari, Robert Schaller, Abu Salek Md. Fahim Chowdhury
In metal matrix composites, thermal stresses are relaxed by either interface debonding, crack propagation or dislocation motion. The present paper shows that in the case of a magnesium matrix, interface thermal stresses are relaxed by dislocation motion in ...
2010Mechanical spectroscopy of 18-carat AuCuPd white gold alloys
Daniele Mari, Robert Schaller, Iva Tkalcec Vâju, John Hennig
The mechanical loss and dynamic modulus temperature spectra of two 18-carat white gold alloys, Au58%Cu24%Pd18% without (grade A) and with alloying additions (grade B), were measured in the 400-1000 K temperature range. A peak interpreted as a Zener relaxat ...
2009