Evaluation of postsoldering cleaning agents
Postsoldering cleaning agent evaluation for compatibility with printed circuit board assembly materials
Osemlak, F. C.↗
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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Hydrogen halide cleaning of nickel-20 chromium containing dispersed thoria
Hydrogen halide cleaning of nickel 20 chromium containing dispersed thoria
Herbell, T. P.↗
Clean assembly and sterilization laboratory Final report
Research and development of sterilization and clean room procedures for spacecraft assembly and planetary quarantine
Source record↗
Some lessons learned in clean room design
Clean room design problems concerning dampers, high pressure blowers, humidifiers, filters, etc
Weber, G. F.↗
Atomically clean surfaces by pulsed laser bombardment
Q spoiled laser bombardment to obtain atomically clean surfaces in vacuum, noting damages
Bedair, S. M.↗
Experimental investigation of momentum exchange between argon and krypton beams incident on clean gold surfaces
Electromagnetic torsion balance measurement of forces exerted on clean Au surfaces by monoenergetic steady state Ar and Kr beams, calculating thermal accommodation coefficients
Mcginn, J. H.↗
Effect of sulfur, oxygen, and hydrogen sulfide surface films on the adhesion of clean iron
Clean iron /011/ surfaces, determining sulfur, oxygen and hydrogen sulfide films effects on adhesion behavior
Buckley, D. H.↗
Noise cleaning in binary-valued digital pictures using 'propagation' processes
Noise cleaning in binary-valued digital pictures using propagation processes
Park, C. M.↗
Adhesion of various metals to a clean iron /011/ surface studied with LEED and Auger emission spectroscopy
Adhesion of single crystal metals to clean iron surface studied by emission spectroscopy
Buckley, D. H.↗
Design requirements for laminar airflow clean rooms and devices
Laminar airflow and airborne contamination control concepts with clean room specifications and laminar flow facility designs
Garst, D. M.↗
A recent significant clean room fire
Clean room fire caused by gas heating element thermostat failure in liquid nitrogen system
Keigher, D. J.↗
Specifications for cleaning, fusion welding, and postheating tantalum and columbium alloys
Specifications for cleaning, fusion welding, and postheating tantalum and niobium alloys
Bowles, K. J.↗
Active cleaning technique for removing contamination from optical surfaces in space
Plasma cleaning technique for removing contaminants from optical surfaces in spacecraft
Gillette, R. B.↗
Active cleaning technique for removing contamination from optical surfaces in space
Development of gas plasma cleaning technique for removing contaminants from optical surfaces in space environments
Gillette, R. B.↗
Glow discharge cleaning and thin film lubricant vapor deposition
Glow discharge cleaning for surface contaminants removal from hydrodynamic gas bearing components, discussing equipment application to thin film lubricant vapor deposition
Source record↗
A technique for making clean holes in metallic piping and components
Testing was conducted to develop a technique of providing clean holes in process piping or in a metal surface accessible from one side only without disassembling the system. The method was performed on sample pieces of piping and worked successfully with no contaminants being found on the inside of the pipe. The materials tested were Inconel 600, 304 stainless steel, Hastelloy X, and ASTM-A53 black steel. The technique was developed such that it could be done in the field with hand-held power tools and a portable tungsten inert gas welding machine.
Hecker, T. P.↗
Hot press and roll welding of titanium-6-percent-aluminum-4-percent-vanadium bar and sheet with auto-vacuum cleaning
Hot press butt welds were made in 0.5 in. diameter bar, and roll lap welds were made in 0.060 in. thick sheet of Ti-6A1-4V. For hot press welds made after auto-vacuum cleaning at 1800 F for 2 hours, weld strength and ductility equaled the parent metal properties. Only 5 minutes of pressing time were needed at 1800 F and 200 psi to make the hot press welds. Roll welds were made in sheet at 1750 F with only 10 percent deformation. The welds in the bar and sheet were metallurgically indistinguishable from the parent material.
Holko, K. H.↗
Electric contact phenomena in ultra clean and specifically contaminated systems.
Contact resistance has been used to characterize the processes of physical contact in metallic systems with ultra clean surfaces. The contact resistance versus load curves of iron and two cobalt alloys were used to demonstrate the existence of surface work hardening and interfacial creep during contact as well as the fracture characteristics of an interfacial junction as the load is removed. The presence of an adsorbed film of hydrogen or hydrogen ions on iron completely changes the contact process. A comparison of the contact resistance versus load data for ultra pure iron, an iron-cobalt alloy and a cobalt molybdenum-chromium was used to illustrate the effect of substrate mechanical properties on static adhesion and the ability to convert these data for the estimation of the dynamic coefficient of friction under the particular experimental conditions.
Keller, D. V., Jr.↗