NDLI: Development and evaluation of vacuum pressure gauge components from carbon and graphite

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Development and evaluation of vacuum pressure gauge components from carbon and graphite

Content Provider	NASA Technical Reports Server (NTRS)
Author	Benson, D. K. Beitel, G. A.
Copyright Year	1972
Description	A prototype all carbon triode ultrahigh vacuum gage was fabricated and tested. The gage exhibited a sensitivity of 3.7 per torr for nitrogen and an X-ray background approximately 0.1 as large as would be expected of a metal gage of the same design. The gage made from these materials, showed good sensitivity and durability. A practical technique was developed for bonding carbon components together without metal fasteners. The bond is made with a cross-linked phenolic resin which is converted to vitreous carbon by a careful pyrolysis procedure. The resulting bonds are strong, electrically conductive, and can withstand repeated excursions to 2500 K in vacuum. Measurements of adsorption and outgassing characteristics of four refractory carbons have confirmed that such materials are suitable for use in ultrahigh vacuum and that some are superior refractory metals in man respects.
File Size	2552815
Page Count	31
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19720023813
Archival Resource Key	ark:/13960/t42r8m02j
Language	English
Publisher Date	1972-09-01
Access Restriction	Open
Subject Keyword	Equipment Specifications Product Development Vacuum Systems Test Equipment Ultrahigh Vacuum Vacuum Gages Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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