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Equations for initial heating rate, resistance rise, power input and energy input for exploding wires are derived from elementary physical principles. The theory ib expected to be valid for an interval beginning at switch-on and ending sometime before the wire expands. Comparisons are made between different wires and pairs of elements are identified which may show similar explosion histories. (Author).
The bibliography includes abstracts of reports on the exploding conductor (exploding wire) phenomenon published from 1774 through 1966. There is also some coverage of important papers in adjacent areas of spectroscopy and instrumentation. Arrangement is by subject group, alphabetically by authors.
This volume contains the proceedings of the Second Conference on the Exploding Wire Phenomenon. In addition to the general theory of exploding wires, this conference considered exploding wire shock waves; the generation by exploding wires of extreme tem peratures, X-rays, and very high pressures; instrumentationprob lems in wire explosions; and, for the first time, exploding foils. Sponsored by the Geophysics Research Directorate ofthe Air Force Cambridge Research Laboratories, this symposium was held in Boston, Massachusetts, on November 13 and 14, 1961. To fill a definite need for ready access to information, Volume Two of Exploding Wires contains a comprehensive index which should facilitate the use of both volumes on the exploding wire phenomenon. It is not possible to express full appreciation to all those whose generous assistance made the Second Conference and this volume possible. It is certain, however, that without the cooperation of Dr. John N. Howard, Laboratory Chief, and Mr. Morton A. Levine, Branch Chief, there could have been no conference. Special ac knowledgment goes to the Staff of the Hydromagnetics Laboratory for its invaluable aid: to Mrs. William Watson for exceptional secretarial work; to Mr. E. H. Cullington for technical assistance; to Mr. C. V. Fish for drawings, graphs, and art work; and to Mr. K. R. Saari for photography. Particular gratitude is due to Mr.
The chemical reactivity of an aluminum-lithium alloy with water was studied by the exploding wire technique. The reactivity was measured by the amount of hydrogen gas product vs the dissipated energy (heat) through the alloy wire. The results show that a small concentration of Li (2.5 weight%) in the alloy has a profound effect on the reactivity. The amount of the dissipated energy through wire was controlled by using crowbar switch current interruptor. The higher reactivity of the alloy wire was observed in the following aspects: The alloy wire with an input energy of 4 kj/gm, reacts with the water almost completely, whereas aluminum wire requires an input energy of 10 kj/gm to complete the reaction. The alloy wire exploded at a lower temperature than aluminum wire provided that their initial heating rates were the same. The input energy that contributes to the chemical conversion of the wire material was supplied through heating during a very short time span, approximately 15 microseconds for the alloy wire and 30 microseconds for aluminum wire.