Working Process for Superconductors by Means of HERF-Technique
نویسندگان
چکیده
At the production of superconductors the compaction of powderform raw materials can be made by means of HERF (H~gh Energy Rate Forming) "powder in tube" techniques, too. The compacting processes of the powders in the metal tubes fitted with metal cores were tested by the authors in the cases of explosive and electromagnetic formings. In order to compare the compacted material structures in the cases of both forming methods were applied cylindrical samples with the same layout. The results of the compacting processes were estimated as functions of the forming parameters. It has been found, that the most favourable grain structures could be realized in the narrow path of forming velocities which are on the given construction of samples typical. The manufacture of semi-products of superconductors can be canied out by means of explosive technology in practice economical, because thespecific costs of electromagnetic forming with large equipments are much more than the costs of explosive forming process with the same energy level. Resum& Le compactage de la poudre au cours de la production des materiawt supraconductibles par la methode "poudre dans le tube" on peut realiser avec l'aide de la HEW-Technique (Formage technique A haute energie ou d grande vitesse). Les auteures ont passe I'exame des procedes de compactage de la poudre dans le tube metallique avec barre roude metallique en cas de formage explosive ainsi que en cas de formage electromagnetique. Afin qu'ils puissent comparer les structures materielles compactes dans les dew cas de formage technique ayant mis en practique test-objetes cylindnques avec arrangement egale. Les resultates des procedes de compactage sont represent4 en fonctions des parametres de formage. Par consequent, les structures des plus avantegeuses grains on pouvait r a i se r dans un intewalle restreint qui sont caracteristique de construction des test-objectes. La fabrication des demi-produits des produits supraconductibles en cas de formage explosive est dans la practique plus economique parce que les frais specifiques de la formage electromagnetique avec installations grandes plus que les frais specifiques de la formage explosive en cas de energie egale.
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