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"Rail travel at high speeds is not possible because passengers, unable to breathe, would die of asphyxia."
Dionysius Lardner, Professor of Natural Philosophy and Astronomy at University College, London ; 1830
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| Number | Title | Issue Date |
| 5830586 | Thermal barrier coatings having an improved columnar microstructure An article having a spallation resistant TBC comprises a metal substrate, such as a high temperature superalloy, and a TBC, such as a coating of yttria stabilized zirconia. The TBC comprises a plurality of plasma-sprayed layers. The TBC has a coherent, co... | 11/03/1998 |
| 5779809 | Method of dissolving or leaching ceramic cores in airfoils A process for removing, leaching, or dissolving ceramic cores used to maintain dimensional tolerances for internal passages during metal casting operations of hollow airfoils. The process is especially suited for dissolving porous ceramic cores, such as a... | 07/14/1998 |
| 5712419 | Method of making coupled 4,6-dibenzoylresorcinols An improved method of making methylene-bridged 4,6-dibenzoylresorcinol dimers in a single step in high yield quantities is provided. The method heats a 4,6-dibenzoylresorcinol (DBR) with a para-aldehyde or an aromatic aldehyde in a carboxylic acid solvent... | 01/27/1998 |
| 5699401 | Anode assembly for use in x-ray tubes, and related articles of manufacture An improved anode assembly for an x-ray tube is described herein. The assembly includes: (a) a target having a central cavity formed therein; (b) a tubular stem for connection to the target to form a target/stem assembly; (c) an insert within the central cavit... | 12/16/1997 |
| 5699396 | Corrosion resistant zirconium alloy for extended-life fuel cladding A zirconium-based alloy with a reduced ahoy content is described that has resistance to both uniform and nodular corrosion comparable to present zirconium-based alloy compositions, such as Zircaloy-2. The alloy represents in essence a modified or diluted ... | 12/16/1997 |
| 5693368 | Low temperature chemical vapor deposition method for cleaning substrate and depositing protective coating A method is disclosed to deposit aluminum coatings on high temperature superalloys for corrosion, oxidation, and erosion protection using low temperature chemical vapor deposition and an organometallic halide precursor, specifically an aluminum alkyl hali... | 12/02/1997 |
| 5685917 | Method for cleaning cracks and surfaces of airfoils The invention is a process for removing oxides, dirt, and organic impurities during repair of airfoils without damaging or effecting surface bond coats or base metal substrates of the airfoils. The process is especially suited for cleaning deep, tortuous ... | 11/11/1997 |
| 5683653 | Systems for recycling overspray powder during spray forming A system for the recycling of overspray powder during spray forming is provided. The system involves providing a refining vessel to contain an electroslag refining layer floating on a layer of molten refined metal. An ingot of unrefined metal is lowered i... | 11/04/1997 |
| 5679820 | Silylated ultraviolet light absorbers having resistance to humidity The instant invention is directed to novel silylated agents having the formula ##STR1## where Ar and Ar' are independently substituted or unsubstituted aromatic rings, R is a branched or unbranched chain of 1 to 6 carbons, R' and R" are independ... | 10/21/1997 |
| 5668068 | Sintered silicon carbide and method of making A method for refined silicon carbide powder comprises attrition milling silicon carbide material in a liquid medium with a milling media to obtain refined silicon carbide particles having a specific surface area of at least 15 m2 /g, and prefer... | 09/16/1997 |
| 5660885 | Protection of thermal barrier coating by a sacrificial surface coating A method for protecting thermal barrier coatings deposited on engine parts from the deleterious effects of environmental contaminants at high temperatures is given. The method uses a sacrificially consumed oxide coating with the thermal barrier coating, w... | 08/26/1997 |
| 5660877 | Method for fabricating lamellar piezoelectric preform and composite A process for fabricating a fully dense ceramic preform for a piezoelectric or electrostrictive composite exhibiting anisotropic 3--3 connectivity. The process involves preparing a homogeneous slurry of a piezoelectric ceramic powder, a binder, dispersant... | 08/26/1997 |
| 5649993 | Methods of recycling oversray powder during spray forming A method for the recycling of overspray powder during spray forming is provided. The method involves providing a refining vessel to contain an electroslag refining layer floating on a layer of molten refined metal. An ingot of unrefined metal is lowered i... | 07/22/1997 |
| 5649992 | Methods for flow control in electroslag refining process A method of electroslag refining of metal is taught. The method includes the introduction of unrefined metal into an electroslag refining process in which the unrefined metal is first melted at the upper surface of the refining slag. The molten metal is r... | 07/22/1997 |
| 5649280 | Method for controlling grain size in Ni-base superalloys A method of high retained strain forging is described for Ni-base superalloys, particularly those which comprise a mixture of γ and γ' phases, and most particularly those which contain at least about 30 percent by volume of γ'. The method utilizes an e... | 07/15/1997 |
| 5646097 | Method of fabricating a (1223) Tl-Ba-Ca-Cu-O superconductor A method is disclosed for fabricating a polycrystalline thallium-containing superconductor having high critical current at elevated temperatures and in the presence of a magnetic field. A powder precursor containing compounds other than thallium is ... | 07/08/1997 |
| 5643474 | Thermal barrier coating removal on flat and contoured surfaces The invention is directed towards a wet chemical process for removing physical vapor deposited or air plasma sprayed thermal barrier coatings from coated parts without damaging or effecting the bond coat or the base metal substrate. The process entails us... | 07/01/1997 |
| 5628938 | Method of making a ceramic composite by infiltration of a ceramic preform A method for making a composite ceramic article by infiltration of a sintered ceramic preform with an infiltrate phase. The ceramic preform is made by directionally solidifying a liquid medium containing a dispersion of ceramic particles to produce a gree... | 05/13/1997 |
| 5599624 | Amorphous silicon oxycarbide coated silicon carbide or carbon fibers Fibers having reduced surface roughness have a continuous coating of a silicone resin that undergoes pyrolysis in hydrogen or helium to form a hard, amorphous solid coat containing silicon, oxygen, and carbon. This silicon oxycarbide glass coating has exc... | 02/04/1997 |
| 5593519 | Supersolvus forging of ni-base superalloys A method of supersolvus forging is described for Ni-base superalloys, particularly those which comprise a mixture of γ and γ' phases, and most particularly those which contain at least about 40 percent by volume of γ'. The method permits the manufactur... | 01/14/1997 |
| 5593506 | Cleaning method for foil Foil used in the manufacture of superconductor material is cleaned using a mechanical abrasive pad that produces longitudinal hills and valleys or elliptical swirls on the surface of both sides of the foil to yield high quality and uniform superconductors... | 01/14/1997 |
| 5591372 | Piezoelectric composite with anisotropic 3-3 connectivity A piezoelectric or electrostrictive composite exhibiting anisotropic 3-3 connectivity with a dense ceramic phase and an infiltrate polymer phase. The ceramic phase is an interconnected ceramic lamelli structure that is arranged substantially parallel in o... | 01/07/1997 |
| 5580741 | Chemiluminescence immunoassay for chlorinated aromatic compound detection A sensitive chemiluminescence immunoassay method for field detection of the presence or the amount of low chlorinated biphenyl compounds in a solution is disclosed. The assay has a five minute analysis time and a working range of detection as low as about... | 12/03/1996 |
| 5571451 | Quantum splitting oxide phosphor and method of making A quantum splitting oxide phosphor is described for use with VUV radiation. The oxide material has an atomic ratio, comprising: Sr1-X PrX Al12-X MgX O19 ; where 0 | 11/05/1996 |
| 5569809 | Method for destruction of chlorinated hydrocarbons A method for detecting and destroying various chlorinated hydrocarbons and unsaturated hydrocarbons in the environment using electrochemical techniques has been invented. By concentrating the chlorinated hydrocarbons or unsaturated hydrocarbons in a solve... | 10/29/1996 |
| 5552352 | Silicon carbide composite with coated fiber reinforcement A composite is comprised of reinforcement fibers having a continuous coating with a first layer of a metal oxide wherein the metal is from the group consisting of aluminum, yttrium, titanium, zirconium, beryllium, silicon, and the rare earths, and a molte... | 09/03/1996 |
| 5552082 | Quantum splitting oxide phosphor and method of making A quantum splitting oxide phospor is described for use with VUV radiation. The oxide material has an atomic ratio, comprising: La1-X PrX MgB5 O10 ; where 0 | 09/03/1996 |
| 5540787 | Method of forming triniobium tin superconductor The solid-liquid diffusion process used to form triniobium tin superconductor is improved by oxidizing the tin coated niobium substrate with an oxide layer on the surface of the tin coat after tin dipping. The oxide layer can be added to the tin coat by p... | 07/30/1996 |
| 5525815 | Diamond film structure with high thermal conductivity A continuous diamond structure deposited by chemical vapor deposition is disclosed having at least two thermal conductivity diamond layers controlled by the diamond growth rate where one thermal conductivity diamond layer is grown at a high growth rate of... | 06/11/1996 |
