Chemical vapor deposition of thoriated tungsten protective cups Page: 20 of 45
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T e ro ss ai^ s p assn t he tungstn p"at-nggas, F6 th thor.tum .arrC.r; the.
is. .A:- ,; " r.' ' H.' 'rI
platin gaesreuan, H2; .8 and the "horium xzr, CO2 ove a rotatingy mandre al
enclosed in a Vycor reaction chamber as illustrated in Figure 4. The mandrel, held in a
special fixture, was supported in the 30 millimeter diameter Vycor reaction chamber through
which gases are admitted and exhausted. The mandrel was inductively heated by a coil
wrapped around the outside of the reaction chamber. Temperature was monitored with an
optical pyrometer; the entire operation was performed in a dark room. The system gases were
metered by variable orifice flowmeters. In this manner, gas ratios and gas flow velocities
could be varied and controlled. Tests were conducted for establishing optimum plating gas
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Blay, J.S. Chemical vapor deposition of thoriated tungsten protective cups, report, January 1, 1968; Pittsburgh, Pennsylvania. (https://digital.library.unt.edu/ark:/67531/metadc1026564/m1/20/: accessed March 26, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.