Surface roughness of alumina fragments caused by hypervelocity impact

Details Surface roughness of alumina fragments caused by hypervelocity impact Surface roughness of alumina fragments caused by hypervelocity impact

Feb 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006p%26ss...54..212k&link_type=abstract

Planetary and Space Science, Volume 54, Issue 2, p. 212-215.

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Hypervelocity impact experiments are carried out with alumina ceramic targets at impact velocities of 2 4 km/s. The fractal dimension (or roughness exponent) of fragment surfaces is estimated by two different methods (different length scales). One is a divider method (large scale) and the other is a gas-absorption one (small scale). The obtained fractal dimensions are different: ˜2.2 2.4 for larger scale and ˜2.5 2.7 for smaller scale. These values are regardless of the degree of fragmentation.

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