Other
Scientific paper
Aug 1948
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1948rspta.241..265n&link_type=abstract
Philosophical Transactions of the Royal Society of London. Series A. Mathematical and Physical Sciences, Volume 241, Issue 831,
Other
Scientific paper
Apparatus is described for subjecting explosive compositions to grazing friction between surfaces of various materials, which can be made to move at various relative velocities up to about 15 ft./sec. Conditions for obtaining reproducible results are detailed. Tests on a number of initiators by means of this apparatus give an order of relative sensitiveness to rubbing between smooth surfaces of steel. When the rubbing occurs in the presence of grit, it is found that certain initiators such as lead azide and lead styphnate have their sensitiveness notably enhanced compared with others, such as mercury fulminate. Photomicrographs of the explosives after rubbing show very considerable break-up of the crystals even when no detonation has occurred. [Note: Table omitted. See the image of page 272 for this table.]
Napier S. E.
Powell Joshua W.
Ubbelohde A. R.
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