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X-ray radiation is widely used in medical and industrial applications. The basic design of the x-ray tube has not changed significantly in the last century. In this paper, we demonstrate that medical diagnostic x-ray radiation can be generated using a carbon nanotube (CNT) based field-emission cathode. The device can readily produce both continuous and(More)
Carbon nanotubes (CNTs) [1, 2] have dimensions similar to those of typical polymeric chains, with 1-50nm in diameter and 1-10µm in length. Experimental results on individual carbon nanotubes and nanotube bundles show that they have exceptional electrical and mechanical properties with an elastic modulus of ~1TPa and fracture strain of 5-10%. [3] The thermal(More)
The effects of structure and morphology on lithium storage in single-wall carbon nanotube (SWNT) bundles were studied by electrochemistry and nuclear magnetic resonance techniques. SWNTs were chemically etched to variable lengths and were intercalated with Li. The reversible Li storage capacity increased from LiC(6) in close-end SWNTs to LiC(3) after(More)
A new form of rolling contact damage was discovered in the fatigue tests of series 6206 deep groove ball bearings under pure radial load with grease lubrication. The appearance of the damage reveals a few cracks at right angles to the rolling direction of the ball, along with the formation of a dent about 20 µm deep in the raceway surface. This is found to(More)
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