Advanced Materials and Processes Research Institute
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Friction and sliding wear of UHMWPE modified cotton fibre reinforced polyester composites
No full textMicrostructural evolution and phase precipitation on ageing Al-Cu alloy.
No full textAn Al-Cu based alloy was subjected to ageing at 210°C and 240°C for varying duration of time between 1 hours to 20 hours after quenching. The microstructure was studied using back scattered electron imaging in the scanning electron microscope to reveal presence of grain boundaries and its growth together with precipitation in the intergranular regions at prolonged ageing times. The constituents of the precipitates were studied by Energy Dispersive X-Ray Analysis (EDAX) to be non-stoichiometric compositions of Al, Cu and Fe. An attempt has been made to correlate the phase constituents with the microhardness to evolve an understanding into the precipitation behaviour and hardening of the alloy on ageing.\ud
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Vers Une puce microfluidique pour la detection de mutations inconnues et le genotypage.
No full textWe present some technological tools that should help to adapt a mutation detection method from capillary electrophoresis to « lab on a chip ». The use of chips raises some specific problems, in particular the control of channel coating and the suppression of spurious flow in channels. Our approach was to use adsorbed neutral polymers as a coating in order to avoid electroosmotic flows. We also present here a robust system for flow control in a microchannel system, based on a dynamic control of reservoir pressures at the end of each channel.\u
Modeling of coal flotation in a batch and continuous cell operation Coal Preparation
No full textDetailed kinetic analyses of various size fractions of coal in a batch and continuous flotation operation have been presented. It is shown that the recoveries of non-ash and ash forming materials of individual size fractions during flotation in both batch and continuous cells can be described adequately by first order kinetic equations. A methodology has been proposed to predict the kinetic parameters in continuous flotation using suitable correction factors to batch flotation data.\u
Comparative study on managemegnetite medium stability in a vorsyl separator and in a heavy medium cyclone.
No full text\u
Slurry Wear Behavior of Zinc-Based Alloys: Influence of Some Material and Test Parameters
No full textAttaining a Controlled Graded Distribution of Particles in\ud Polymerizing Fluid for Functionally Graded Materials
No full textThe precise control on concentration profile\ud
of dispersion in functionally graded material (FGM) is essential\ud
for obtaining a desired material. A suitable simulation\ud
of parameters and an appropriate model that describes\ud
the motion of particles in the fluid can predict various aspects\ud
those are needed to produce FGM, by gravity sedimentation\ud
or centrifugation technique. Simulation was conducted\ud
to observe the changes in concentration profile, while\ud
using the following equations applicable to polymerizing fluid,\ud
and to determine the terminal velocities (Vm) of particles; Vm\ud
� �D2��s � �l�g*�1 � �s�4.65�/�18�0ebtc� for gravity sedimentation\ud
and Vm � �D2��s � �l�r�2(1��s�4.65}/(18�0 ebtc) for centrifugation,\ud
where D is the diameter of the spherical particle, �s\ud
the density of solid particles, �l the density of fluid, � the\ud
viscosity of fluid, g* the acceleration due to gravity, �s is the\ud
volume fraction of particles, and tc is the elapsed time of curing\ud
of thermosetting resin. b is a constant, r is the radius, and � is\ud
the angular velocity. This simulation demonstrates that the\ud
time of centrifugation/sedimentation, particle size, distribution\ud
of particle size, and centrifugal/gravitational forces can be\ud
effectively utilized to attain a desired concentration profile in\ud
graded materials. Simulation also revealed that there exist the\ud
possibility of two graded profiles, namely low concentration\ud
profile and high concentration profile, in one sample of graded\ud
material, made either by centrifugation or sedimentation. Low\ud
concentration profile is more sensitive to particle size distribution\ud
as compared to high concentration profile. The present\ud
simulation method is also sensitive to concentration-measuring\ud
methods
Jerosite characteristics and its utilization potentials ELSEVIER Science of the Total Environment.
No full textMicrostructural evolution and phase precipitation on ageing Al-Cu alloy
No full textAn Al-Cu based alloy was subjected to ageing at 210°C and 240°C for varying duration of time between 1 hours to 20 hours after quenching. The microstructure was studied using back scattered electron imaging in the scanning electron microscope to reveal presence of grain boundaries and its growth together with precipitation in the intergranular regions at prolonged ageing times. The constituents of the precipitates were studied by Energy Dispersive X-Ray Analysis (EDAX) to be non-stoichiometric compositions of Al, Cu and Fe. An attempt has been made to correlate the phase constituents with the microhardness to evolve an understanding into the precipitation behaviour and hardening of the alloy on ageing