Patents Represented by Attorney Charles E. Sohl

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  • Method for producing metallic articles having durable ceramic thermal barrier coatings
    Patent number: 4405660
    Abstract: A coated article and method for producing the coated article are described. The article is coated with a system which provides protection against oxidation and corrosion and which significantly reduces the substrate temperature. An MCrAlY layer is applied to the article to be protected and a columnar grain ceramic is applied by vapor deposition to the MCrAlY coated article. An alumina layer which exists between the MCrAlY layer and the columnar ceramic layer provides for the adherence of the columnar layer to the MCrAlY layer. An important feature of the invention is that the interface between the MCrAlY layer and the alumina layer has a low surface roughness and this greatly improves the columnar ceramic layer adherence.
    Type: Grant
    Filed: December 4, 1981
    Date of Patent: September 20, 1983
    Assignee: United Technologies Corporation
    Inventors: Nicholas E. Ulion, Duane L. Ruckle
  • Method for producing columnar grain ceramic thermal barrier coatings
    Patent number: 4405659
    Abstract: A coated article and method for producing the coated article are described. The article is coated with a system which provides protection against oxidation and corrosion and which significantly reduces the substrate temperature. An MCrAlY layer is applied to the article to be protected and a columnar grain ceramic is applied by vapor deposition to the MCrAlY coated article. An alumina layer which exists between the MCrAly layer and the columnar ceramic layer provides for the adherence of the columnar layer to the MCrAlY layer.
    Type: Grant
    Filed: December 4, 1981
    Date of Patent: September 20, 1983
    Assignee: United Technologies Corporation
    Inventor: Thomas E. Strangman
  • Superalloy single crystal articles
    Patent number: 4402772
    Abstract: A specific composition range and process sequence are described for the production of single crystal superalloy articles which have an exceptional combination of high temperature mechanical properties and resistance to oxidation and hot corrosion. The nominal composition is 6% Ta, 9% Cr, 5% Co, 1% Ti, 1% Mo, 7% W, 5.5% Al, 0.15% Hf balance essentially nickel. Material of this composition is cast and solidifed in single crystal form and heat treated to produce an optimum microstructure.
    Type: Grant
    Filed: September 14, 1981
    Date of Patent: September 6, 1983
    Assignee: United Technologies Corporation
    Inventors: David N. Duhl, Alan D. Cetel
  • Method for producing columnar grain ceramic thermal barrier coatings
    Patent number: 4401697
    Abstract: A coated article and method for producing the coated article are described. The article is coated with a system which provides protection against oxidation and corrosion and which significantly reduces the substrate temperature. An MCrAlY layer is applied to the article to be protected and a columnar grain ceramic is applied by vapor deposition to the MCrAlY coated article. An alumina layer which exists between the MCrAly layer and the columnar ceramic layer provides for the adherence of the columnar layer to the MCrAlY layer.
    Type: Grant
    Filed: December 4, 1981
    Date of Patent: August 30, 1983
    Assignee: United Technologies Corporation
    Inventor: Thomas E. Strangman
  • Superalloy properties through stress modified gamma prime morphology
    Patent number: 4392894
    Abstract: A high strength nickel base superalloy having a novel microstructure is described. The article consists of a gamma matrix containing a oriented gamma prime second phase having a plate or rod form. This noncuboidal gamma prime phase is produced by aging solution treated material under an applied stress. When this process is applied to a certain class of superalloys which are rich in refractory elements, the resultant structure provides exceptional resistance to creep at elevated temperatures.
    Type: Grant
    Filed: September 24, 1980
    Date of Patent: July 12, 1983
    Assignee: United Technologies Corporation
    Inventors: David D. Pearson, Frank D. Lemkey, Bernard H. Kear
  • Constant energy rate forming
    Patent number: 4375375
    Abstract: An improved method for hot working materials previously considered to be difficult or impossible to hot work is described. The method consists of varying the deformation conditions in order to achieve an essentially constant energy input, to the material being worked, on a time basis.
    Type: Grant
    Filed: October 30, 1981
    Date of Patent: March 1, 1983
    Assignee: United Technologies Corporation
    Inventors: Anthony F. Giamei, Robert E. Doiron
  • Silicon carbide coated carbon fibers and composites
    Patent number: 4373006
    Abstract: Silicon carbide coated carbon fibers and composite materials incorporating these fibers are disclosed. The silicon carbide coating provides electrical insulation and improved resistance to environmental degradation. The coated fibers may be embedded in organic, metal or glass matrices to form useful composite materials.
    Type: Grant
    Filed: December 10, 1980
    Date of Patent: February 8, 1983
    Assignee: United Technologies Corporation
    Inventors: Francis S. Galasso, Richard D. Veltri
  • Single crystal nickel superalloy
    Patent number: 4371404
    Abstract: A specific composition range and process sequence are described for the production of single crystal superalloy articles which have an exceptional combination of high temperature mechanical properties and resistance to oxidation and hot corrosion. The nominal composition in weight percent is 7.5% Cr, 5.0% Al, 1.0% Ti, 2.0% Mo, 4.0% W, 12.0% Ta, 5% Co, balance nickel. Material of this composition is cast and solidified in single crystal form and heat treated to produce an optimum microstructure.
    Type: Grant
    Filed: January 23, 1980
    Date of Patent: February 1, 1983
    Assignee: United Technologies Corporation
    Inventors: David N. Duhl, Xuan Nguyen-Dinh
  • Hot corrosion resistant coatings
    Patent number: 4371570
    Abstract: A coated article and method for producing the coated article are described. The article is provided with a coating system which provides protection against hot corrosion at moderate temperatures (1200-1700.degree. F.). An overlay coating based on a metal selected from the group consisting of iron, nickel or cobalt or mixtures thereof and containing chromium and optionally aluminum, yttrium and/or hafnium is applied to the article to be protected. A silicon rich surface zone is produced at the surface of the overlay coating. Methods including pack cementation and physical vapor deposition are described for producing the coating.
    Type: Grant
    Filed: February 1, 1982
    Date of Patent: February 1, 1983
    Assignee: United Technologies Corporation
    Inventors: Joseph A. Goebel, Richard H. Barkalow, Nicholas E. Ulion
  • High temperature fatigue oxidation resistant coating on superalloy substrate
    Patent number: 4346137
    Abstract: An improved high temperature fatigue resistant coating for nickel and cobalt base superalloys having good oxidation and sulfidation resistance. The coating comprises by weight, 8-30% Co, 8-30% Cr, 5-20% Al, 10-60% Ni and 0.05-1.0% of a reactive metal selected from the group of Y, Sc, La and mixtures thereof, balance selected from the group consisting of Pt, Rh, and mixtures thereof, the (Pt+Rh) content being at least 13%.
    Type: Grant
    Filed: December 19, 1979
    Date of Patent: August 24, 1982
    Assignee: United Technologies Corporation
    Inventor: Ralph J. Hecht
  • Heat treated single crystal articles and process
    Patent number: 4328045
    Abstract: An alloy composition coasting scheme and specific heat treatment process are described for the production of directionally solidified single crystal articles which have exceptional properties. The alloy is based on the Ni-Al-Mo system, preferably with additions of Ta. The process for producing the article inclused directional solidification at a high rate to produce a fine dendritic microstructure. A combined homogenizing and solution treatment is performed to provide a unique chemically homogeneous single phase microstructure. This homogeneous article is rapidly quenched and then aged at an intermediate temperature to develop a controlled uniform distribution of fine gamma prime phase particles.
    Type: Grant
    Filed: August 11, 1980
    Date of Patent: May 4, 1982
    Assignee: United Technologies Corporation
    Inventors: David D. Pearson, Frank D. Lemkey, Bernard H. Kear
  • Hot corrosion resistant coatings
    Patent number: 4326011
    Abstract: A coated article and method for producing the coated article are described. The article is provided with a coating system which provides protection against hot corrosion at moderate temperatures (1200.degree.-1700.degree. F.). An overlay coating based on a metal selected from the group consisting of iron, nickel or cobalt or mixtures thereof and containing chromium and optionally aluminum, yttrium and/or hafnium is applied to the article to be protected. A silicon rich surface zone is produced at the surface of the overlay coating. Methods including pack cementation and physical vapor deposition are described for producing the coating.
    Type: Grant
    Filed: February 11, 1980
    Date of Patent: April 20, 1982
    Assignee: United Technologies Corporation
    Inventors: Joseph A. Goebel, Richard H. Barkalow, Nicholas E. Ulion
  • Method for fabricating articles by sequential layer deposition
    Patent number: 4323756
    Abstract: A method is described for the production of bulk rapidly solidified metallic articles of near-net shape, by depositing multiple thin layers of feedstock using an energy beam to fuse each layer onto a substrate. The feedstock may be in the form of metal powder or wire. Different finished geometries are also described.
    Type: Grant
    Filed: October 29, 1979
    Date of Patent: April 6, 1982
    Assignee: United Technologies Corporation
    Inventors: Clyde O. Brown, Edward M. Breinan, Bernard H. Kear
  • Columnar grain ceramic thermal barrier coatings on polished substrates
    Patent number: 4321310
    Abstract: A coated article and method for producing the coated article are described. The article is coated with a system which provides protection against oxidation and corrosion and which significantly reduces the substrate temperature. An MCrAlY layer is applied to the article to be protected and a columnar grain ceramic is applied by vapor deposition to the MCrAlY coated article. An alumina lyaer which exists between the MCrAlY layer and the columnar ceramic layer provides for the adherence of the columnar layer to the MCrAlY layer. An important feature of the invention is that the interface between the MCrAlY layer and the alumina layer has a low surface roughness and this greatly improves the columnar ceramic layer adherence.
    Type: Grant
    Filed: January 7, 1980
    Date of Patent: March 23, 1982
    Assignee: United Technologies Corporation
    Inventors: Nicholas E. Ulion, Duane L. Ruckle
  • Columnar grain ceramic thermal barrier coatings
    Patent number: 4321311
    Abstract: A coated article and method for producing the coated article are described. The article is coated with a system which provides protection against oxidation and corrosion and which significantly reduces the substrate temperature. An MCrAlY layer is applied to the article to be protected and a columnar grain ceramic is applied by vapor deposition to the MCrAlY coated article. An alumina layer which exists between the MCrAlY layer and the columnar ceramic layer provides for the adherence of the columnar layer to the MCrAlY layer.
    Type: Grant
    Filed: January 7, 1980
    Date of Patent: March 23, 1982
    Assignee: United Technologies Corporation
    Inventor: Thomas E. Strangman
  • Thermal treatment and resultant microstructures for directional recrystallized superalloys
    Patent number: 4318753
    Abstract: A thermal treatment is described for the production of a particular microstructure in nickel base superalloys. Nickel superalloys having this microstructure are particularly adapted to be directionally recrystallized.
    Type: Grant
    Filed: October 12, 1979
    Date of Patent: March 9, 1982
    Assignee: United Technologies Corporation
    Inventors: Ralph E. Anderson, Jr., Scott E. Hughes
  • Method for producing fine grained pyrolytic silicon nitride
    Patent number: 4289801
    Abstract: Novel fine grained pyrolytic silicon nitride is produced by adding a substantial amount of methane to the normal reactant gases. Silicon tetrafluoride and ammonia in ratios of 60:40 to 10:90 may be employed with additions of methane in amounts equal to from 50 to 500% of the sum of silicon tetrafluoride and ammonia. When these reactant gases are passed over a heated substrate at a low pressure pyrolytic silicon nitride with a grain size of less than about 10 microns results.
    Type: Grant
    Filed: May 21, 1980
    Date of Patent: September 15, 1981
    Assignee: United Technologies Corporation
    Inventors: Francis S. Galasso, Malcolm Basche, deceased
  • Tantalum modified gamma prime-alpha eutectic alloy
    Patent number: 4288259
    Abstract: This disclosure relates to directionally solidified articles produced from a eutectic alloy in the nickel-aluminum-molybdenum system with tantalum added. The articles have a microstructure consisting of a ductile matrix phase of gamma prime containing a fibrous reinforcing second phase of alpha Mo. The nominal composition of the base alloy is 6.9 weight percent aluminum, 15.2 weight percent tantalum, 18.5 weight percent molybdenum, balance nickel. The directionally solidified alloy articles of the invention are characterized by exceptional mechanical properties combined with good oxidation resistance and reasonable sulfidation resistance at elevated temperatures.
    Type: Grant
    Filed: December 4, 1978
    Date of Patent: September 8, 1981
    Assignee: United Technologies Corporation
    Inventors: David D. Pearson, Franklin D. Lemkey
  • Process for producing supported skeletal catalytic materials
    Patent number: 4287096
    Abstract: A method for producing a supported skeletal catalyst is described. The starting material is an alloy which consists of an aluminum or silicon matrix containing fine particles of an intermetallic compound between the matrix material and a catalytically active metal. Chemical means are used to convert the matrix material to an oxide ceramic while removing the matrix material from the intermetallic particles.
    Type: Grant
    Filed: March 18, 1980
    Date of Patent: September 1, 1981
    Assignee: United Technologies Corporation
    Inventors: Gerald S. Golden, Franklin D. Lemkey, Clyde S. Brooks
  • Stranded nickel braze alloy preforms
    Patent number: 4279121
    Abstract: Fabrication techniques for making nickel boron stranded wire braze preforms are described. The techniques involve the provision of the wire material in a stranded form having a large surface to volume ratio. This general form consists of a plurality of fine wires, having the desired cross-sectional area, which may be twisted or braided to produce the preform.
    Type: Grant
    Filed: October 3, 1979
    Date of Patent: July 21, 1981
    Assignee: United Technologies Corporation
    Inventors: Edward J. Ryan, David A. Rutz, Jack W. Lee