Abstract: A solid state electrochemical cell comprising:(a) an electrolyte comprising a polymeric matrix, an inorganic salt and a solvent;(b) an anode comprising a thin film of lithium metal or an alloy thereof; and(c) a cathode comprising a polymeric matrix, a conductive carbon and a metal salt, M.sub.2 ZO.sub.4, wherein M is Ag or Cu and Z is W, Mo or Cr.
Type:
Grant
Filed:
May 19, 1995
Date of Patent:
July 8, 1997
Assignee:
The United States of America as represented by the Secretary of the Air Force
Inventors:
Bruno Scrosati, Richard A. Marsh, Lawrence G. Scanlon, Jr.
Abstract: Substituted biphenyl sulfones of the formula: ##STR1## wherein R is ##STR2## wherein Z is --H, --CH.sub.3, --CF.sub.3, --F, --OCH.sub.3 or --OCF.sub.3 ; and R' is --R or --H, are useful as lubricants in the temperature range of up to about 750.degree. F.
Type:
Grant
Filed:
December 18, 1995
Date of Patent:
June 24, 1997
Assignee:
The United States of America as represented by the Secretary of the Air Force
Abstract: A polymer having repeating units of the formula: ##STR1## wherein Q is ##STR2## wherein X is --NH--, --S-- or --O--. A copolymer having repeating units of the formula: ##STR3## wherein x has a value of 0.01 to 0.99 and Q is ##STR4## wherein X is --NH--, --S-- or --O--.
Type:
Grant
Filed:
February 23, 1996
Date of Patent:
May 27, 1997
Assignee:
The United States of America as represented by the Secretary of the Air Force
Abstract: 4-Hydroxybenzocyclobutene is prepared by the demethylation of 4-methoxybenzocyclobutene in the presence of aluminum iodide. A new compound 4-trimethylsiloxybenzocyclobutene is prepared by reacting 4-hydroxybenzocyclobutene with chlorotrimethylsilane.
Type:
Grant
Filed:
February 12, 1996
Date of Patent:
April 1, 1997
Assignee:
The United States of America as represented by the Secretary of the Air Force
Abstract: High compressive strength, three-dimensional para-oriented benzobisoxazole polymers of the formula: ##STR1## wherein Q is ##STR2## and wherein Z represents repeating units of the formula: ##STR3##
Type:
Grant
Filed:
June 30, 1995
Date of Patent:
March 11, 1997
Assignee:
The United States of America as represented by the Secretary of the Air Force
Inventors:
My Dotrong, Minhhoa Dotrong, Robert C. Evers
Abstract: The compound 2-ethynyl-5-(4-pyridyl)ethynyl thiophene: ##STR1## when incorporated into a thermoplastic polymer having repeating units of the formula: ##STR2## wherein X is --O-- or --S--, and R is selected from the group consisting of: ##STR3## and Ar is selected from the group consisting of: ##STR4## wherein X is as previously defined, poled to align the molecules and cured to crosslink at least the terminal acetylenic groups, has second-order nonlinear optical activity.
Type:
Grant
Filed:
August 7, 1995
Date of Patent:
January 14, 1997
Assignee:
The United States of America as represented by the Secretary of the Air Force
Inventors:
Bruce A. Reinhardt, Jayprakash C. Bhatt
Abstract: A method to produce high temperature oxidation resistant metal matrix composites by fiber diameter grading which comprises the steps of (a) laying up an alloy/fiber preform consisting of a plurality of alternating layers of metal alloy and fibers and (b) consolidating the preform under suitable conditions, wherein fibers of at least two diameters are employed and wherein the layers of fibers in the preform are graduated so that larger diameter fibers are located nearer what will become the exposed surface of the composite and smaller diameter fibers are located toward the interior of the composite.
Type:
Grant
Filed:
July 24, 1995
Date of Patent:
November 26, 1996
Assignee:
The United States of America as represented by the Secretary of the Air Force
Abstract: Gamma titanium aluminide alloys having the composition Ti--(45.5-47.5)Al--(0-3.0)X--(1-5)Y--(0.05-1.0)W, where X is Cr, Mn or any combination thereof, and Y is Nb, Ta or any combination thereof (at %), are treated to provide specific microstructures. To obtain duplex microstructures, the annealing temperature (T.sub.a) range is the eutectoid temperature (T.sub.e)+100.degree. C. to the alpha transus temperature (T.sub..alpha.)-30.degree. C.; to obtain nearly lamellar microstructures, the annealing temperature range is T.sub..alpha. -20.degree. C. to T.sub..alpha. -1.degree. C.; to obtain fully lamellar microstructures, the annealing temperature range is T.sub..alpha. to T.sub..alpha. +50.degree. C. The times required for producing these microstructures range from 0.25 to 15 hours, depending on the desired microstructure, alloy composition, annealing temperature selected, material section size and grain size desired.
Type:
Grant
Filed:
January 27, 1995
Date of Patent:
September 24, 1996
Assignee:
The United States of America as represented by the Secretary of the Air Force
Abstract: The cutting of attachment threads in a carbon-carbon billet is improved by coating the portion to be threaded with an epoxy resin, and at least partially curing the resin prior to cutting the threads.
Type:
Grant
Filed:
April 24, 1986
Date of Patent:
July 30, 1996
Assignee:
The United States of America as represented by the Secretary of the Air Force
Abstract: An optical solar reflector comprising a layer of silicon nitride having a reflective metallic coating on one side thereof and an optional dielectric coating on the opposite side.
Type:
Grant
Filed:
August 23, 1993
Date of Patent:
July 30, 1996
Assignee:
The United States of America as represented by the Secretary of the Air Force
Inventors:
Richard A. Tanzilli, Joseph J. Gebhardt
Abstract: A thermal insulating device for use as the exterior coating of a space vehicle which consists essentially of a rigid carbon-carbon foam having an elastomeric foam bonded to the rear surface thereof and having a chemically vapor deposited coating applied to the front and side surfaces thereof.
Type:
Grant
Filed:
August 23, 1983
Date of Patent:
July 30, 1996
Assignee:
The United States of America as represented by the Secretary of The Air Force
Inventors:
Richard A. Tanzilli, Joseph J. Gebhardt, Richard M. Fenton, James C. Kreitz, Jr.
Abstract: Triarylamino-based dinitrile and dicarboxylic acid monomers as represented by the formula: ##STR1## wherein Z is --CN or --COOH and R is selected from the group consisting of --H, --CH.sub.3, --N(CH.sub.3).sub.2 and --OH.
Type:
Grant
Filed:
January 26, 1995
Date of Patent:
July 16, 1996
Assignee:
The United States of America as represented by the Secretary of the Air Force
Abstract: A self-lubricating aluminum alloy bearing material which can be used in vacuum, dry or moist environments which consists essentially of about 0.5 to 25, preferably about 5-20 volume percent of hard ceramic particles and about 1 to 7, preferably 3-5 volume percent of at least one solid lubricant, balance an aluminum alloy.
Type:
Grant
Filed:
November 28, 1994
Date of Patent:
July 9, 1996
Assignee:
The United States of America as represented by the Secretary of the Air Force
Abstract: Polymers of the class rigid-rod aromatic heterocyclic polymers, having repeating units of the formula: ##STR1## wherein R is selected from the group consisting of --H, --CH.sub.3, --N(CH.sub.3).sub.2 and --OH, and Q is ##STR2## wherein X is --S-- or --O--, exhibit increased electrical conductivity, as compared to rigid-rod aromatic heterocyclic polymers polymers not containing the triarylamino moiety.
Type:
Grant
Filed:
January 26, 1995
Date of Patent:
July 9, 1996
Assignee:
The United States of America as represented by the Secretary of the Air Force
Abstract: A copolymer having repeating units of the formula: ##STR1## wherein R is selected from the group consisting of --H, --CH.sub.3, --N(CH.sub.3).sub.2 and --OH, x has a value of 0.01 to 0.99 and Q is ##STR2## wherein X is --S-- or --O--.
Type:
Grant
Filed:
January 26, 1995
Date of Patent:
May 28, 1996
Assignee:
The United States of America as represented by the Secretary of the Air Force
Abstract: A crosslinkable polymer having repeating units of the formula: ##STR1## wherein Ar is selected from the group consisting of ##STR2## These polymers are useful in the preparation of molecular composites with rigid-rod polymers, including para-oriented benzobisazole polymers, such as benzobisthiazole, benzobisoxazole and benzobisimidazole polymers.
Type:
Grant
Filed:
June 19, 1995
Date of Patent:
May 7, 1996
Assignee:
The United States of America as represented by the Secretary of the Air Force
Abstract: A lubricant composition comprises a perfluorinated polyalkylether base fluid (PFPAE) and an oxidation-corrosion inhibiting amount of a perfluoro-substituted benzothiazole or bis-benzothiazole. The benzothiazole compound additive exhibits excellent solubility in the base fluid and possesses outstanding low volatility characteristics. As a result, the lubricant composition functions as a noncorrosive, stable material suitable for long term applications over a wide temperature range (-65.degree. F. to >600.degree. F.) in an oxidative environment.The perfluoro-substituted benzothiazoles and bis-benzothiazoles have the formula: Q--R.sub.f or Q--R.sub.f '--Q, wherein Q is ##STR1## wherein R.sub.f is a linear or branched perfluoroalkylether group containing at least one ether linkage and R.sub.f ' is a linear or branched perfluoroalkyleneeher group containing at least one ether linkage.
Type:
Grant
Filed:
December 1, 1994
Date of Patent:
June 4, 1996
Assignee:
The United States of America as represented by the Secretary of the Air Force
Abstract: An improved method for fabricating ceramic composites, particularly single crystal alumina fiber and yttrium-aluminum garnet (YAG) matrix composites. The method of this invention comprises the steps of (a) coating the fiber with a metal which is stable under oxidizing conditions, such as Pd, (b) coating the metal-coated fiber with a fugitive phase, such as Mo, (c) incorporating the coated fiber into a matrix material, (d) densifying the fiber-matrix into a composite and (e) heat treating the composite under oxidizing conditions to remove the fugitive phase.
Type:
Grant
Filed:
April 10, 1996
Date of Patent:
April 1, 1997
Assignee:
The United States of America as represented by the Secretary of the Air Force
Abstract: Perfluoroalkylether-linked quinoxalines having repeating units of the formula: ##STR1## wherein R.sub.f is selected from the group consisting of --OCF.sub.2 CF.sub.2 --, --OCF.sub.2 CF.sub.2 CF.sub.2 --, --OCF.sub.2 CF.sub.2 CF.sub.2 CF.sub.2 --, --OCF.sub.2 CF(CF.sub.3)-- and --OCF.sub.2 CF.sub.2 OCF.sub.2 CF(CF.sub.3)--; wherein n has a value of 2 to 4, and m has a value of 1 to 20; and wherein R is a single bond, --O--, --S--, --C.sub.6 H.sub.4 --O--C.sub.6 H.sub.4 --, or --SO.sub.2 --, are prepared by the steps of(a) preparing a perfluoroalkylether diiodide of the formula I(CF.sub.2).sub.n (R.sub.f).sub.m (CF.sub.2).sub.n l;(b) reacting the perfluoroalkylether diiodide with 4-iodobenzil to produce the tetraketone C.sub.6 H.sub.5 C(O)C(O)C.sub.6 H.sub.4 (CF.sub.2).sub.n (R.sub.f).sub.m (CF.sub.2).sub.n C.sub.6 H.sub.4 C(O)C(O)C.sub.6 H.sub.5 ; and(c) reacting the resulting tetraketone with a tetraamine of the formula ##STR2## wherein R is a single bond, --O--, --S--, --C.sub.6 H.sub.4 O--C.sub.6 H.sub.
Type:
Grant
Filed:
January 16, 1996
Date of Patent:
July 1, 1997
Assignee:
The United States of America as represented by the Secretary of the Air Force
Inventors:
Kazimiera J. L. Paciorek, Steven R. Masuda, Wen-Huey Lin, William M. Warner