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Slot antennas on dielectric-coated perfectly conducting objects have extensively been studied by many investigators. For these problems, exact analytic solutions are available only for a limited number of geometries. These geometries include circular and elliptic cylinders, as well as, spheres and spheroids. Since these solutions maintain mathematical rigor, they provide not only exact solutions for...
Planar wire array Z pinches were carried out on the QiangGuang-I facility (1.3 MA, 100 ns). The effect of prepulse current and insulating coatings on the Z pinch behavior is investigated. Commonly there is a multichannel gas switch filled with 0.5 Mpa dry air between the transmission line and the MITL to cut off the prepulse current. By varying gas pressure filled in the switch, the parameters of...
A Fe-based composite coating reinforced by multiple TiB2–TiC–Al2O3 ceramic particles was developed by gas tungsten arc welding (GTAW) melting process. Mixture of aluminum (Al), boron carbide (B4C), and titanium dioxide (TiO2) powders was used as precursors, and as a consequence TiB2–TiC–Al2O3 multiple ceramic particles were in situ synthesized during GTAW melting process. Microstructural investigations...
The hardness of a Pt-modified Ni aluminide bond coat and its ZrO 2 top coat in an electron beam-physical vapor deposition ZrO 2 -based thermal barrier coating system has been studied as a function of temperature in as-deposited and aged (1200°C/1h) coupon samples, and in a used blade taken out of service after a (modest) fraction of life. A marked brittle to ductile transition at 580±30°C...
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