Journal
JOURNAL OF NON-CRYSTALLINE SOLIDS
Volume 352, Issue 6-7, Pages 615-619Publisher
ELSEVIER
DOI: 10.1016/j.jnoncrysol.2005.11.058
Keywords
glasses; scanning electron microscopy; polymers and organics; processing; radiation
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Hydrogen is used to absorb heavy particle radiation, which is the most damaging radiation in space for humans. Low density polyethylene/hollow glass microsphere composites have been suggested as a possible radiation shield because of the high concentration of hydrogen and the low gravimetric density of the microspheres. Composites pressed under 3.90 MPa (566 psi) and 120 degrees C have the highest probability of success thus far compared to polymers pressed at higher pressures and lower temperatures. Hollow glass microspheres made of borosilicate glasses do not break as easily as hollow glass microspheres made of aluminosilicate glasses. A smooth microsphere surface is better than a rough surface because it distributes the force more evenly, resulting in a more hydrostatic stress environment. (c) 2006 Elsevier B.V. All rights reserved.
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