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A recent report by NASA identified dust/particulate mitigation techniques as a highly relevant study for future long-term planetary exploration missions (NASA, 2015). The deleterious effects of lunar dust on spacesuits discovered during the Apollo missions has compelled NASA to identify dust mitigation as a critical path for potential future lunar, asteroid and Mars missions. The complexity of spacesuit...
Dust resuspension and deposition is a ubiquitous phenomenon in all lunar and Martian missions. The near-term plans to return to the Moon as a stepping stone to further exploration of Mars and beyond bring scientists’ attention to development and evaluation of lunar and Martian dust mitigation technologies. In this paper, different lunar and Martian dust transport mechanisms are presented, followed...
Oriented hybrid nickel tethered graphene polyimide resin nanocomposites with different degrees of orientation were prepared by in-situ magnetic field solvent casting method. Magnetization of the hybrid Ni-graphene polyimide nanocomposites exhibited a maximum in the magnetic field direction and a minimum perpendicular to the magnetic field direction indicating the orientation of the superparamagnetic...
Composite Nickel graphene nanoparticles with hybrid magnetic and electrical properties were prepared. Nickel nanoparticles were tethered to the graphene through a carbon layers and were covered with an amorphous carbon layer to protect them from oxidation. Ni-graphene polyimide nanocomposites were prepared and exhibited magnetic characteristics and high electrical conductivity. The saturation magnetization...
The Thermal Degradation Sample (TDS) experiment was one of the many investigations performed on the lunar surface during Apollo 14. Remarkably, the results of this 40year old experiment were never fully interpreted, perhaps in part because the hardware vanished after its return. Mission records, high resolution photographs returned from the mission, and recent laboratory investigations have been used...
For the first time, graphite fibers have been electrochemically intercalated with Br − that have the same structure and properties as those intercalated from vapor phase Br 2 . This was accomplished by intercalating pitch-based Thornel ® K-1100 graphite fibers at low temperature (near 0°C) and high currents (2A) for long times (6h). The mechanism appears to be that Br −...
A series of woven fabric laminar composite plates and narrow strips were fabricated from a variety of pitch-based pristine and bromine intercalated graphite fibers in an attempt to determine the influence of the weave on the electrical and thermal conduction. It was found generally that these materials can be treated as if they are homogeneous plates. The rule of mixtures describes the resistivity...
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