Thermal conductivity of coated particle uranium dioxide tungsten cermets
Thermal conductivity measurements on tungsten coated uranium dioxide cermets
Grossman, L. N.↗
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A high temperature, electrically insulating cermet seal having high strength and thermal conductance.
High temperature cermet seal for research thermionic diode, discussing resistivity, structural integrity, thermal shock resistance, tensile strengths and thermal conductance
Breitwieser, R.↗
A high-temperature, electrically insulating cermet seal having high strength and thermal conductance.
High temperature insulating cermet seal for thermionic diodes noting high shock resistance and thermal conductance
Breitwieser, R.↗
High-temperature cermets. I - Compatibility.
Refractory oxides, carbides and borides in combination with metals investigated for stability in high temperature cermet applications
Manning, C. R., Jr.↗
High-temperature cermets. II - Wetting and fabrication.
Wetting and fabrication characteristics of high temperature cermets
Manning, C. R., Jr.↗
Development of silicon nitride and cermet resistors for use in a binary counter, metal insulator field effect transistor circuit Final report, 1 Dec. 1966 - 31 Mar. 1968
Silicon nitride and cermet resistors for binary counter metal insulator field effect transistor circuit
Brown, G. A.↗
Fabrication of cermets of uranium nitride and tungsten or molybdenum from mixed powders and from coated particles
Fabrication of cermets of uranium nitride and tungsten or molybdenum from mixed powders and from coated particles for nuclear fuel elements
Takkunen, P. D.↗
A procedure for furnace brazing butt joints in tungsten-uranium dioxide cermet cylinders at 3000 deg C
Furnace brazing butt joints in tungsten-uranium dioxide cermet cylinders at 3000 deg C
Adams, D. W.↗
Thermal and radiation stability of thin-film cermet resistive elements
Thermal and radiation stability of thin films cermet resistive elements with silicon monoxide
Tarpley, J. L.↗
Method of making a cermet Patent
Cermet for nuclear fuel constructed by pressing metal coated ceramic particles in die at temperature to cause bonding of metal coatings, and tested for thermal stability
Kaznoff, A. I.↗
Thermal and radiation stability of thin-film cermet resistive elements
Thin film cermet resistive elements physical controls electrical properties, physical controls, thermal and radiation stability
Tarpley, J. L.↗
Some neutron and gamma radiation characteristics of plutonium cermet fuel for isotopic power sources
Gamma and neutron measurements on various types of plutonium sources are presented in order to show the effects of O-17, O-18 F-19, Pu-236, age of the fuel, and size of the source on the gamma and neutron spectra. Analysis of the radiation measurements shows that fluorine is the main contributor to the neutron yields from present plutonium-molybdenum cermet fuel, while both fluorine and Pu-236 daughters contribute significantly to the gamma ray intensities.
Neff, R. A.↗
In-pile and out-of-pile testing of a molybdenum-uranium dioxide cermet fueled themionic diode
The behavior of Mo-UO2 cermet fuel in a diode for thermionic reactor application was studied. The diode had a Mo-0.5 Ti emitter and niobium collector. Output power ranged from 1.4 to 2.8 W/cm squared at emitter and collector temperatures of 1500 deg and 540 C. Thermionic performance was stable within the limits of the instrumentation sensitivity. Through 1000 hours of in-pile operation the emitter was dimensionally stable. However, some fission gases (15 percent) leaked through an inner clad imperfection that occurred during fuel fabrication.
Diianni, D. C.↗
A study of the microstructure and optical properties of thin lead-dielectric cermet films
A transmission electron microscopy study involving direct and replicating techniques is directed to a definition of the microstructure of radio frequency-sputtered, thin lead-dielectric cermet films. Once defined, this microstructure is used to obtain theoretical film refractive indices. The Maxwell Garnett theory provides a basis for the theoretical results. Measurements of film transmission and reflectivity are used to obtain rough experimental values for film refractive indices by the Tekucheva method. More exact values are obtained via ellipsometry. The rough Tekucheva values are used to determine the range over which computer calculations interpreting the ellipsometric results must be made. This technique yields accurate values for the film refractive indices.
Owen, R. B.↗
High temperature oxidation resistant cermet compositions
Cermet compositions are designed to provide high temperature resistant refractory coatings on stainless steel or molybdenum substrates. A ceramic mixture of chromium oxide and aluminum oxide form a coating of chromium oxide as an oxidation barrier around the metal particles, to provide oxidation resistance for the metal particles.
Phillips, W. M.↗
High temperature resistant cermet and ceramic compositions
High temperature oxidation resistance, high hardness and high abrasion and wear resistance are properties of cermet compositions particularly to provide high temperature resistant refractory coatings on metal substrates, for use as electrical insulation seals for thermionic converters. The compositions comprise a sintered body of particles of a high temperature resistant metal or metal alloy, preferably molybdenum or tungsten particles, dispersed in and bonded to a solid solution formed of aluminum oxide and silicon nitride, and particularly a ternary solid solution formed of a mixture of aluminum oxide, silicon nitride and aluminum nitride. Ceramic compositions comprising a sintered solid solution of aluminum oxide, silicon nitride and aluminum nitride are also described.
Phillips, W. M.↗
Coating with overlay metallic-cermet alloy systems
A base layer of an oxide dispersed, metallic alloy (cermet) is arc plasma sprayed onto a substrate, such as a turbine blade, vane, or the like, which is subjected to high temperature use. A top layer of an oxidation, hot corrosion, erosion resistant alloy of nickel, cobalt, or iron is then arc plasma sprayed onto the base layer. A heat treatment is used to improve the bonding. The base layer serves as an inhibitor to interdiffusion between the protective top layer and the substrate. Otherwise, the 10 protective top layer would rapidly interact detrimentally with the substrate and degrade by spalling of the protective oxides formed on the outer surface at elevated temperatures.
Gedwill, M. A.↗
Overlay metallic-cermet alloy coating systems
A substrate, such as a turbine blade, vane, or the like, which is subjected to high temperature use is coated with a base coating of an oxide dispersed, metallic alloy (cermet). A top coating of an oxidation, hot corrosion, erosion resistant alloy of nickel, cobalt, or iron is then deposited on the base coating. A heat treatment is used to improve the bonding. The base coating serves as an inhibitor to interdiffusion between the protective top coating and the substrate. Otherwise, the protective top coating would rapidly interact detrimentally with the substrate and degrade by spalling of the protective oxides formed on the outer surface at elevated temperatures.
Gedwill, M. A.↗