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CRYOGENICS AND ITS SPACE APPLICATIONS full report


Posted by: project report tiger
Created at: Monday 15th of February 2010 08:04:22 AM
Last Edited Or Replied at :Sunday 21st of March 2010 03:24:18 AM
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ure, but itâ„¢s a bit flakey, for these reasons:
¢ it only applies to certain physical systems (those with a small number of energy levels),
¢ negative temperatures are hotter than (some) positive temperatures,
¢ A system with a negative temperature will eventually cool down (or warm up, depending on how you look at it) to a positive temperature, even if it is insulated perfectly from its surroundings.
Hereâ„¢s a bit more detail. Certain physical systems have small set of energy levels that they can be in. For example, a laser uses this principle. The atoms (or molecu..................[:=> Show Contents <=:]



composite materials for aerospace applications ppt


Posted by: chinna518
Created at: Monday 01st of March 2010 10:41:47 AM
Last Edited Or Replied at :Sunday 28th of March 2010 04:09:44 PM
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send me th..................[:=> Show Contents <=:]



composite materials for aerospace applications ppt


Posted by: sri.2988
Created at: Thursday 25th of February 2010 06:12:22 AM
Last Edited Or Replied at :Wednesday 04th of May 2011 05:17:45 AM
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CRYOGENICS AND ITS SPACE APPLICATIONS full report


Posted by: project report tiger
Created at: Monday 15th of February 2010 08:04:22 AM
Last Edited Or Replied at :Sunday 21st of March 2010 03:24:18 AM
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hermal conductivity so that not much heat leaks into the salt pill through the suspension. The ends of the Kevlar lines are attached to bolts (shown in blue.) By turning the bolts, technicians can tighten or loosen the cords.
Heat Switch Shell
The brown part with the cutaway upper edge is the shell of the heat switch. The shell is a cylinder. It is made of Vespel, a polyimide material, which provides high strength with low thermal conductivity. (Vespel is a DuPont trademark.) Not shown in this drawing is a layer of titanium foil on the outside of the Vespel, to block room temperature perm..................[:=> Show Contents <=:]



Microphotonics for Space Application full report


Posted by: project reporter
Created at: Monday 01st of February 2010 01:25:34 AM
Last Edited Or Replied at :Friday 04th of June 2010 04:06:00 AM
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¢ Miniature scientific payloads on a chip for planetary and deep-space exploration..
¢ Optical processors for distributed sensors/actuators for smart microsystems, composite and membrane structures.
¢ Optical distribution and processing of RF signals for advanced phase-array antennas.
¢ Optical processor for rocket propulsion monitoring system.
¢ Advanced nana-satellites, miniature scientific payloads and planetary explorers.
¢ Miniature high-performance spectrometers and advanced data processing for Earth observation and planetary exploration (atmospheric studies, hype..................[:=> Show Contents <=:]



METALLURGICAL CHANGES IN STEELS DUE TO CRYOGENIC PROCESSING ITS APPLICATIONS


Posted by: computer science technology
Created at: Sunday 24th of January 2010 11:20:47 AM
Last Edited Or Replied at :Sunday 24th of January 2010 11:20:47 AM
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on of the tool away from the source and increasing its life.

Because austenite and martensite have different size crystal structures, there will be stresses built in to the crystal structure where the two co-exist. Cryogenic processing eliminates these stresses by converting most of the retained austenite to martensite. This also creates a possible problem. If there is a lot of retained austenite in a part, the part will grow due to the transformation. This is because the austenitic crystals are about 4% smaller than the martensitic crystals due to their different crystal structure.

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Composites materials for aerospace applications full report


Posted by: computer science technology
Created at: Sunday 24th of January 2010 07:49:09 AM
Last Edited Or Replied at :Sunday 24th of January 2010 07:49:09 AM
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e number of components are required, metallic conventional tooling is preferred. Resin injection moulding also finds use in special components such as radomes. Some of the popular systems are given in table 4 along with the types of components where they are used in a typical high-performance aircraft.
Table 2. Reinforcing fibres commonly use in aerospace applications.
Fibre Density (g/cc) Modulus (GPa) Strength (GPa) Application areas
Glass
E-glass
S-glass
2.55
2.47
65-75
85-95
2.2-2.6
4.4-4.8
Small passenger a/c parts, air-craft interiors, secondary parts; Radomes; rocket m..................[:=> Show Contents <=:]



CRYOGENICS


Posted by: seminar projects crazy
Created at: Friday 30th of January 2009 12:58:28 PM
Last Edited Or Replied at :Saturday 08th of December 2012 03:28:21 AM
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chieving high ejection velocities...................[:=> Show Contents <=:]



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