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The deposition of particulates in air sampling tubes

Description: An investigation was performed to define particulate deposition in exhaust air sampling tubes for plutonium areas. Twelve sampling tubes were washed with nitric acid. Residues from wash solutions were counted for total alpha activity. Results indicate negligible sample loss due to particulate deposition in sample delivery tubes.
Date: April 30, 1973
Creator: Mossoni, N. J. & Kittinger, W. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Chemical vapor deposition of ZrC in small bore carbon-composite tubes

Description: Process conditions are described for the chemical vapor deposition of ZrC from ZrCl/sub 4/--CH/sub 4/--HCl--H/sub 2/--Ar vapor over the temperature range 1320 to 1775 deg K. From an analysis of the process conditions (initial composition of coating gas, axial temperature profile along the tubes, total pressure, and length of deposition time), the subsequent ZrC coat thickness profiles and thermodynamic data, an equation expressing the variation of the axial rate of ZrC deposition is derived. Th… more
Date: January 1, 1973
Creator: Wallace, T. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Interrelationships between process parameters, structure, and properties of CVD tungsten and tungsten--rhenium alloys

Description: From conference on structure-property relationships in thick film and bulk coatings; San Francisco, California, USA (28 Jan The development of CVD techniques for fabricating free-standing tungsten and tungsten - rhenium alloy structures is reviewed. Relationships between plating parameters, kinetics, morphology, microstructure, and properties of thick polycrystalline deposits are discussed. It is emphasized that porosity may be grown into the grain boundaries when the deposition rate is cortrol… more
Date: December 1, 1973
Creator: Holman, William R. & Huegel, Frank J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Cluster carburizing. Final report, June 1, 1973-May 31, 1979

Description: Three major accomplishments of the cluster carburizing program were showing that the hardness of aged and carburized materials could be controlled via the aged structure; developing a new and analytical theory of subscale formation; and characterizing the properties of Ta-Hf alloys with respect to precipitation kinetics and morphology, diffusion kinetics, age hardening, and subscale formation. The first of these verified the cluster carburizing concept, which has potential use in the developmen… more
Date: June 1, 1973
Creator: Morral, J. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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