Computer Science
Scientific paper
Nov 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975kosis..13..923s&link_type=abstract
Kosmicheskie Issledovaniia, vol. 13, Nov.-Dec. 1975, p. 923-931. In Russian.
Computer Science
Lunar Soil, Mass Spectroscopy, Soil Mechanics, Thermogravimetry, Desorption, Hydroxyl Radicals, Lunik 16 Lunar Probe, Mechanical Properties, Moisture Content, Surface Properties, Vacuum Effects, Water
Scientific paper
The properties of lunar soil obtained by Luna-16 were studied by mass spectrometry and thermogravimetry. The composition of gases evolved during thermodesorption was studied, together with the effects of temperature, exposure to various gases, and the composition of surface particles on the contact-mechanical properties of regoliths. It was found that these properties were affected by the water content (the hydroxyl group in particular), as well as by the size and form of the surface particles of the soil. The total bound and free water content of the specimens (8.18 micromoles/gm) did not change upon exposure to a severe vacuum at room temperature. Heating under vacuum removed a large portion of the water, resulting in an increase in cohesiveness and in the angle of internal friction. The contact-mechanical properties were not affected by the pure gas medium (He, Ar, H2, N2); however, storage in oxygen led to the disintegration of some particles due to oxidation and to the formation of hydroxyl groups, accompanied by a rapid decrease of cohesiveness.
Cherkasov I. I.
Shandor V. V.
Surkov Iu. A.
Toporov Iu. P.
Zhuravlev L. T.
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