| Method of Measuring the Thermal Conductivity of Microscopic Graphite Fibers. |
24 DEC 1996 |
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| Authors:
John Barkyoumb; Lawrence T. Kabacoff; David J. Land; DEPARTMENT OF THE NAVY WASHINGTON DC
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 | A metal or graphite fiber is suspended in a working fluid having a high refractive index change with the temperature and a modulated laser beam heats the fiber producing a synchronous thermal wave in the fiber whose amplitude and phase are measured by passing a probe laser beam through the liquid close to the fiber and converting the probe beam deflections into an electric signal. A theoretical model of the ... |
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| Vibration Damping Structural Laminate. |
24 OCT 1995 |
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| Authors:
Lawrence T. Kabacoff; Chak-Pan Wong; Arthur E. Clark; DEPARTMENT OF THE NAVY WASHINGTON DC
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| A structural laminate of rigid layers separated by very thin layers of viscous fluid. The viscous fluid adheres to the confronting surfaces of adjacent rigid layers and is maintained in layered alignment within the laminate to ordinarily prevent flexural vibration and provide vibration overdampening to cope with flexural deforming forces. |
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| Magnetostrictive Torque Sensor. |
31 MAY 1994 |
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| Authors:
Howard T. Savage; Arthur E. Clark; Marilyn Wun-Fogle; Lawrence T. Kabacoff; Antonio Hernando; DEPARTMENT OF THE NAVY WASHINGTON DC
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| Magnetostrictive wire having a low surface-to-volume ratio established by a constant non-planar cross-section, is helically deformed into contact with a shaft under a stress maintaining the wire in fixed relation to the shaft surface. Magnetic anisotropy is imparted to the wire by twist thereof about its cross-sectional axis while the wire is being helically deformed into contact with the shaft surface to form a torque sensor through which accurate torque ... |
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| Method of Doping Single Crystal Diamond for Electronic Devices. |
29 MAR 1994 |
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| Authors:
Lawrence T. Kabacoff; John Barkyoumb; DEPARTMENT OF THE NAVY WASHINGTON DC
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| A method of doping diamond by (1) ion implanting carbon into the diamond to create a damage zone of opaque, nondiamond material; (2) ion implanting a semiconductor dopant material that is a pentavalent donor dopant or a trivalent acceptor dopant into the damage zone of opaque, nondiamond carbon material; (3) melting the opaque, nondiamond carbon material by lased light; and (4) allowing the carbon melt to cool and crystallize homoepitaxially ... |
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| Method of Joining Diamond Structures. |
05 JAN 1993 |
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| Authors:
Lawrence T. Kabacoff; John Barkyoumb; DEPARTMENT OF THE NAVY WASHINGTON DC
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| A process for bonding two diamond surfaces together by (1) forming a layer of opaque non-diamond carbon material between the two diamond surfaces; (2) pressing the diamond surfaces together with the opaque non-diamond material sandwiched between the diamond surfaces; (3) used pulse lased light to quickly melt all the opaque non-diamond carbon material before a significant amount of heat is lost through the diamond surface; and then (4) allowing the ... |
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| Consolidation of Diamond Packed Powders. |
14 JAN 1992 |
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| Authors:
Lawrence T. Kabacoff; John Barkyoumb; DEPARTMENT OF THE NAVY WASHINGTON DC
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| A process for producing a diamond composite comprising diamond powder particles bonded together by polycrystalline diamond by (1) pressing an intimate mixture of fine opaque nondiamond carbon powder and transparent diamond powder to form a green body that is confined in either a thin walled transparent quartz vessel or a polycrystalline diamond coating; (2) using a pulse laser to quickly melt the opaque nondiamond carbon powder, and (3) allowing the ... |
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| Method of Joining Diamond Structures. |
08 JUL 1991 |
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| Authors:
Lawrence T. Kabacoff; John Barkyoumb; DEPARTMENT OF THE NAVY WASHINGTON DC
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| This invention relates to diamond materials and more particular to methods of bonding diamond pieces together. Diamond is the ideal material for a large number of applications. Diamond is highly transparent to infrared radiation (IR) and radar, has the highest known heat conductivity, highest known hardness, produces little friction, does not conduct electricity, etc. Thus, diamond has properties that make it desirable as structural material for many applications, including radomes. ... |
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| Method of Doping Single Crystal Diamond for Electronic Devices. |
08 JUL 1991 |
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| Authors:
Lawrence T. Kabacoff; DEPARTMENT OF THE NAVY WASHINGTON DC
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| This invention relates to diamonds and more particularly to methods of doping diamonds. It has been widely known for many years that diamond would be greatly superior to either silicon or GaAs as a material for integrated circuits. Reasons include the greater heat conductivity of diamond, the higher carrier mobilities; the higher operating temperatures, and the intrinsic radiating hardness such a chip would possess. The problem has been to find ... |
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| Consolidation of Diamond Packed Powders. |
08 JUL 1991 |
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| Authors:
Lawrence T. Kabacoff; DEPARTMENT OF THE NAVY WASHINGTON DC
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| This invention relates to diamonds and more particularly to diamond structural materials. Diamond is the ideal material for a large number of applications. Diamond is highly transparent to infrared radiation (IR) and radar, has the highest known heat conductivity, highest known hardness, produces little friction, does not conduct electricity, etc. However, diamond powders cannot be consolidated by currently known processes such as are used in the fabrication of ceramics (for ... |
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| Laser Communication System with Wide Band Magnetostrictive Modulation. |
26 FEB 1991 |
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| Authors:
Lawrence T. Kabacoff; DEPARTMENT OF THE NAVY WASHINGTON DC
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| A laser beam conducted through an optical fiber cable is phase modulated for communication purposes by a signal encoder operative through a source of current to generate a modulated magnetic field applied to a magnetostrictive sheathing. The magnetostrictive sheathing is annealed and covers a portion of the fiber cable which undergoes dimensional change to effect modulation. |
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| Corrosion Resistant Metallic Glass Coatings. |
23 OCT 1990 |
9 pages |
| Authors:
Lawrence T. Kabacoff; William Ferrando; DEPARTMENT OF THE NAVY WASHINGTON DC
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 | This patent discloses the corrosive-resistant, amorphous metal alloy coatings for crystalline metal surfaces wherein the coating is formed by vapor deposition of a mixture of (1) from 8 to 30 atomic percent of boron, silicon, or mixtures thereof and (2) the remainder being a modified metal composition formed by modifying the composition of the crystalline metal of the surface to produce a final amorphous metal alloy coating that is anodic ... |
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| Metal Film Coatings on Amorphous Metallic Alloys. |
03 JUL 1990 |
4 pages |
| Authors:
Lawrence T. Kabacoff; Kristl B. Hathaway; DEPARTMENT OF THE NAVY WASHINGTON DC
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| Coating of crystalline metals (Ag, Au, Cu, A1) are formed on amorphous metallic alloys (glassy metals) by cathode magnetron sputtering. The process can be used to produce new products such as copper coated amorphous metallic alloy wires for torpedo controls, shielding materials for electromagnetic waves, and anticorrosion coatings for Fe-metalloid magnetostrictive elements. Patents. (js) |
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| Analog Frequency Modulated Laser Using Magnetostriction. |
26 JUN 1990 |
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| Authors:
Lawrence T. Kabacoff; DEPARTMENT OF THE NAVY WASHINGTON DC
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| The present invention relates to an analog frequency modulatable laser. The radiation of the lasing medium is analog frequency modulated by change of the optical path length by movement of reflective mirrors forming the resonant cavity at the frequency of radiation of the laser in a manner corresponding to an information signal. In one embodiment, a magnetostrictive material is deposited on and bonded to the outer periphery of an active ... |
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| Corrosion Resistant Metallic Glass Coatings Background of the Invention. |
01 MAR 1990 |
23 pages |
| Authors:
Lawrence T. Kabacoff; DEPARTMENT OF THE NAVY WASHINGTON DC
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| This invention relates to amorphous metal alloys and particularly to amorphous metal alloy coatings for protecting metals against corrosion. Metallic glasses are relatively new materials that are produced in the form of ribbons, wires, or coatings by rapid solidification from either the liquid or vapor state. They are truly noncrystalline alloys which combine the properties of a metal (electrical conductivity, metallic luster, etc.) with the lack of long range order ... |
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| Laser Communication System With Wide Band Magnetostrictive Modulation. |
15 SEP 1989 |
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| Authors:
Lawrence T. Kabacoff; DEPARTMENT OF THE NAVY WASHINGTON DC
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| A laser beam conducted through an optical fiber cable is phase modulated for communication purposes by a signal encoder operative through a source of current to generate a modulated magnetic field applied to a magnetostrictive sheathing. The magnetostrictive sheathing is annealed and covers a portion of the fiber cable which undergoes dimensional change to effect modulation. Patent applications. (jhd) |
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| Magnetostrictive Torque Sensor. |
21 JUN 1989 |
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| Authors:
Howard T. Savage; Arthur E. Clark; Marilyn Wun-Fogie; Lawrence T. Kabacoff; Antonio Herando; DEPARTMENT OF THE NAVY WASHINGTON DC
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| Magnetostrictive wire having a low surface-to-volume ratio established by a constant non-planar cross-section, is helically deformed into contact with a shaft under a stress maintaining the wire in fixed relation to the shaft surface. Magnetic anisotropy is imparted to the wire by twist thereof about its cross-sectional axis while the wire is being helically deformed into contact with the shaft surface to form a torque sensor through which accurate torque ... |
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| Magnetomechanical Energy Conversion. |
09 AUG 1988 |
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| Authors:
Arthur E. Clark; Lawrence T. Kabacoff; Howard T. Savage; Christine Modzelewski; DEPARTMENT OF THE NAVY WASHINGTON DC
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| A metallic glass ribbon of the formula Fe(w)B(x)Si(y)C(z) wherein 0.78 < or = w < or = 0.83, 0.13 < or = x < or = 0.17, 0.03 < or = y < or = 0.07, 0.005 < or = z < or = 0.03, and w+x+y+z=1, is annealed to remove mechanical strains and exposed to a magnetic field in the plane of the ribbon and transverse to the long ... |
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| Magnetomechanical Energy Conversion. |
09 AUG 1988 |
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| Authors:
Arthur E. Clark; Lawrence T. Kabacoff; Howard T. Savage; Christine Modzelewski; DEPARTMENT OF THE NAVY WASHINGTON DC
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| A metallic glass ribbon of the formula FewBxSiyCz wherein 0.78 < or = w < or = 0.83, 0.13 < or = x < or = 0.17, 0.03 < or = y < or = 0.07, 0.005 < or = z < or = 0.03, and w+x+y+z=1, is annealed to remove mechanical strains and exposed to a magnetic field in the plane of the ribbon and transverse to the long ... |
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Reports by Author
