Thermionic Emission from a Niobium Single Crystal
1974
A spherical projection diode was used to determine the Richardson constants from a niobium spherical single crystal. Work function and AR values are reported for the [110], [111], [112], [113], [116], [001], and [310] crystallographic directions. Examination of the crystal surface revealed plateau-like surface structure, thermal etch pits, and whisker growth.
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