Effect of low density inert gas flush on oxygen-columbium reaction at 1500 deg F to 2000 deg F Final report
Gas-metal interaction and impurities analyzed in low density gas flow chamber
GAS-METAL INTERACTION↗
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The interaction of small particles and thin films of metals with gases. I - A brief review of the early stages of oxide formation
Existing work on gas-solid reactions making use of thin film technologies is reviewed. The discussion concentrates on two major areas of gas-metal interactions: chemisorption and the early stages of oxidation of metals (characterized by a non-volatile reaction product) and catalytic surface reactions (featuring volatile reaction products). A brief survey of oxide formation on metals is presented. Here it is of importance to distinguish between reactions on continuous thin film substrates and reactions on particulate deposits. Small particle-gas interactions also affect the nucleation, growth and sintering processes of thin films. It is shown that various combinations of UHV and high resolution electron microscopy techniques, which include in situ experimentation, can provide the appropriate tools for studying angstrom particle chemistry.
Poppa, H.↗
Calculations of the interactions of diatomic molecules with solid surfaces
Calculations of interactions of diatomic molecules with solid surfaces
GAS-METAL INTERACTION↗
Chemisorption detector for hydrogen.
Chemisorption detector for hydrogen using palladium filament under high vacuum conditions
GAS ANALYZER↗
An investigation of the reaction of titanium with hydrogen Summary report
Hydrogen gas reaction with titanium and titanium alloys determined at low temperatures and pressures
GAS-METAL INTERACTION↗
The current state of the art of alkali metal analysis
Laboratory methods to determine quantitative nitrogen, hydrogen, oxygen, and carbon impurities in sodium
SODIUM↗
Ionization from Fe atoms incident on various gas targets
Ionization from iron atoms incident on target gases of helium, neon, nitrogen, carbon dioxide, and air
IRON↗
First steps in the oxidation of a /110/ nickel surface
Initial steps in oxidation of nickel surface studied using low energy back-reflection electron diffraction
NICKEL↗
Gas-surface processes and LEED
Low energy back-reflection electron diffraction used to study monocrystalline surface processes
CRYSTAL SURFACE↗
Adsorption of atoms and molecules upon the surface of a single crystal and chemical reactions that take place upon the surface /low energy electron diffraction/ Annual progress report, 1966-1967
Low energy electron diffraction research of chemical interactions of gases with single crystal metal surfaces, and gas adsorption on nickel and tungsten surfaces
GAS-METAL INTERACTION↗
Diffraction study of oxygen adsorption on a /110/ tungsten face.
Oxygen adsorption on tungsten crystal face studied by back-reflection low energy electron diffraction
ADSORPTION↗
Effect of the Electrostatic Field due to the Surface Monolayer Metal Atoms on the Dissociation of Homonuclear Diatomic Gases in Gas-Metal Surface Reactions
The present paper examines the role of an electrostatic field generated by the outermost monolayer of metal ions prior to gas adsorption in aiding the dissociation of homonuclear diatomic gas molecules. The interaction of five homonuclear diatomic gases, Cl 2 , F 2 , H 2 , N 2 and O 2 , with several pure metals are examined using Coulomb’s law to calculate the attractive and repulsive forces between the electrons or ions in the gas molecule and the free surface metallic electrons or ions assuming a Bohr model. These calculations demonstrate that the total energy of the electrostatic fields from the metals can exceed the molecular binding energies of Cl 2 , F 2 , and O 2 at some distance from the metallic surface thereby suggesting that these gases interact primarily with the metallic surface in their atomic states after molecular bond dissociation prior to reaction. In contrast, H 2 and N 2 gases do not dissociate prior to reaching the metal surface due to the fact that the effective charge of the gas ions is less than the total electron charge at the outermost electronic shell. The present results correlate linearly with the electrochemical series standard reduction potential as well as with the Pauling electronegativity for several metals.
Gas-metal reactions↗