Physics
Scientific paper
Oct 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979esasp.153...99m&link_type=abstract
In ESA Comet Halley Micrometeoroid Hazard Workshop p 99-100 (SEE N80-22200 12-91)
Physics
1
Brittle Materials, Hypervelocity Projectiles, Impact Damage, Micrometeoroids, Morphology, Glass, Hypervelocity Impact, Impact Tests, Iron, Polystyrene, Spallation
Scientific paper
Microcraters were produced in sodalime glass and fused quartz by polystyrene-divinylbenzene, aluminum, and iron projectiles with masses between 0.5 and 200 picograms and velocities between 0.5 and 15 km/sec. The experiments were done with a 1.5 MV vertical microparticle accelerator. For each projectile and target combination, craters were formed over a range of projectile velocities and masses. It is shown that a ratio of 2.2 + or - 0.2 between the diameter of the central part of the crater and the diameter of the projectile is valid for a range of velocities. The ratio of central pit diameter and depth to projectile diameter increases with increasing impact velocity. Figures showing the influence of the density of the projectile upon the depth of the crater and the variation of crater diameter with the mass of the projectile are presented.
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