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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Some investigations into spark gap recovery in air and hydrogen

Burnett, Neal Harvey January 1967 (has links)
Studies were conducted into several aspects of the recovery of a spark gap consisting of 6 mm. diameter, flat tungsten electrodes, after an initial discharge of 32 kamp. maximum, and duration 11 sec. The controlling effect of electrode heat transport on the intermediate recovery of the spark gap was demonstrated using air at 760 mm. Hg as a discharge medium, and gap lengths of 3, 4, and 5 mm. In the intermediate stages of recovery, the increase in breakdown strength of the gap was found to be proportional to t½, and to be nearly independent of gap length. These results are explained on the basis of uniaxular heat flow, through the electrodes. A previously observed long-time or delayed recovery in a hydrogen spark gap between clean tungsten electrodes was investigated to establish the possible role of hydrogen-tungsten adsorption in this effect. The temperatures of the electrodes were varied by means of small heating coils, and the recovery characteristics for heated electrodes measured. By comparing these results to the normal recovery characteristic, the phenomana of delayed recovery was shown to be at least partially attributable to the adsorption of hydrogen onto the electrode surfaces. / Science, Faculty of / Physics and Astronomy, Department of / Graduate
2

Evaluation of CVD tungsten metallization for integrated circuit application

Blacke, Douglas Otto January 1980 (has links)
No description available.
3

Tungsten carbides as potential alternative direct methanol fuel cell anode electrocatalysts

Zellner, Michael. January 2006 (has links)
Thesis (Ph.D.)--University of Delaware, 2006. / Principal faculty advisor: Jingguang G. Chen, Dept. of Chemical Engineering. Includes bibliographical references.

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