Flame spraying

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CPC
C23C4/129

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CCHEMISTRY METALLURGY C23Surface treatment C23CCOATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL C23C4/00Coating by spraying the coating material in the molten state

Current Industry

C23C4/129Flame spraying

Industries

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Patents Grantslast 30 patents

Information Patent Grant
NiCrBSi—ZrB2 metal ceramic powder, composite coating for high tempe...
- Patent number 12,146,223
- Issue date Nov 19, 2024
- Anhui University of Technology
- Shihong Zhang
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Oxidation resistant bond coat layers, processes for coating article...
- Patent number 12,146,224
- Issue date Nov 19, 2024
- RTX Corporation
- Xia Tang
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Antimicrobial products containing silver and copper particles
- Patent number 12,121,029
- Issue date Oct 22, 2024
- SILVER PARTICLE COMPANY LIMITED
- Yuen Keung Raymond Chin
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Abradable coating
- Patent number 12,110,799
- Issue date Oct 8, 2024
- SAFRAN AIRCRAFT ENGINES
- Guillaume Fradet
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Insulation layer on steel pistons
- Patent number 12,110,837
- Issue date Oct 8, 2024
- Tenneco Inc.
- Norbert G. Schneider
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Aluminum alloy hub and method for coating surface of aluminum alloy...
- Patent number 12,091,755
- Issue date Sep 17, 2024
- CITIC Dicastal CO., LTD.
- Ziguang Liu
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Composite coating, piston, engine and vehicle
- Patent number 12,085,039
- Issue date Sep 10, 2024
- WEICHAI POWER CO., LTD.
- Fei Ma
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
High velocity oxy air fuel thermal spray apparatus
- Patent number 12,076,884
- Issue date Sep 3, 2024
- FUNDACION TECNALIA RESEARCH AND INNOVATION
- Georgiy Barykin
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Thin and texturized films having fully uniform coverage of a non-sm...
- Patent number 12,018,384
- Issue date Jun 25, 2024
- Praxair S. T. Technology, Inc.
- Ardy S Kleyman
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Type 8 heater mat
- Patent number 11,987,367
- Issue date May 21, 2024
- GKN Aerospace Services Limited
- Stephen Goodfellow Jones
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
One-step methods for creating fluid-tight, fully dense coatings
- Patent number 11,965,251
- Issue date Apr 23, 2024
- Praxair S. T. Technology, Inc.
- Daming Wang
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Wind turbine transmission
- Patent number 11,952,978
- Issue date Apr 9, 2024
- Miba Gleitlager Austria GmbH
- Gunther Hager
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Method to manufacture a component for a machine for the production...
- Patent number 11,932,945
- Issue date Mar 19, 2024
- IMA Industria Macchine Automatiche S.p.A.
- Gabriele Rustici Venturini
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Thin coatings for hydraulic components
- Patent number 11,859,290
- Issue date Jan 2, 2024
- Caterpillar Inc.
- Daniel Joseph Sordelet
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Solvent-free processing of lithium lanthanum zirconium oxide coated...
- Patent number 11,821,091
- Issue date Nov 21, 2023
- UChicago Argonne, LLC
- Jessica L Durham
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Wear resistant layer
- Patent number 11,819,913
- Issue date Nov 21, 2023
- Oerlikon Metco (US) Inc.
- Wei Liu
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Soluble metal sealing ring with controllable dissolution rate and p...
- Patent number 11,821,518
- Issue date Nov 21, 2023
- SOUTHWEST PETROLEUM UNIVERSITY
- Xiaohong Wang
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
System and method for applying high temperature corrosion resistant...
- Patent number 11,814,711
- Issue date Nov 14, 2023
- LIQUIDMETAL COATINGS ENTERPRISES, LLC
- John Kang
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Method of making a brake disc and brake disc for a disc brake
- Patent number 11,788,593
- Issue date Oct 17, 2023
- Brembo S.p.A.
- Fabiano Carminati
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Vitreous coating application by induction heating and integration w...
- Patent number 11,773,495
- Issue date Oct 3, 2023
- AMPCLAD COATING TECHNOLOGIES INC
- David Grant Lingnau
- B05 - SPRAYING OR ATOMISING IN GENERAL APPLYING LIQUIDS OR OTHER FLUENT MATER...
Information Patent Grant
Poppet valve
- Patent number 11,767,774
- Issue date Sep 26, 2023
- EATON INTELLIGENT POWER LIMITED
- Alberto Aimasso
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Method of manufacturing a sensor element for a potentiometric sensor
- Patent number 11,753,710
- Issue date Sep 12, 2023
- Endress + Hauser Conducta GmbH + Co. KG
- Thomas Wilhelm
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Spray plume position feedback for robotic motion to optimize coatin...
- Patent number 11,745,201
- Issue date Sep 5, 2023
- General Electric Company
- Christopher Joseph Lochner
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Brake disk and method for producing a brake disk
- Patent number 11,725,704
- Issue date Aug 15, 2023
- Ford Global Technologies, LLC
- Marc Oliver Rettig
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Iron-based alloy powder and molded article using same
- Patent number 11,718,900
- Issue date Aug 8, 2023
- Choongnyun Paul Kim
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Method for obtaining rolling mill rolls with a coating of tungsten...
- Patent number 11,702,727
- Issue date Jul 18, 2023
- MECANIZACION INDUSTRIAL ASTILLERO, S.A.
- Gregorio Fuentevilla Diaz
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Environmental barrier coating with oxygen-scavenging particles havi...
- Patent number 11,692,274
- Issue date Jul 4, 2023
- Raytheon Technologies Corporation
- Kenneth David Smith
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
High velocity spray torch for spraying internal surfaces
- Patent number 11,684,936
- Issue date Jun 27, 2023
- Alan W. Burgess
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Method for making a brake disc and brake disc for disc brake
- Patent number 11,661,985
- Issue date May 30, 2023
- Brembo S.p.A.
- Fabiano Carminati
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Multicomponent alloy coating
- Patent number 11,624,104
- Issue date Apr 11, 2023
- Industrial Technology Research Institute
- Wu-Han Liu
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...

Patents Applicationslast 30 patents

Information Patent Application
COATING FOR HYDRAULIC RODS AND OTHER SLIDING COMPONENTS AND METHOD...
- Publication number 20240417841
- Publication date Dec 19, 2024
- Ardy S. Kleyman
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
High Entropy Alloy Repair of Nickel and Cobalt Superalloys
- Publication number 20240410312
- Publication date Dec 12, 2024
- Pratt & Whitney Canada Corp.
- Payank Patel
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Application
CoCr Alloy Carbide Composite Coatings for High-Temperature Applicat...
- Publication number 20240410045
- Publication date Dec 12, 2024
- Pratt & Whitney Canada Corp.
- Alejandra Islas Encalada
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Application
Manufacturing of Wear Resistant Coatings
- Publication number 20240410046
- Publication date Dec 12, 2024
- Pratt & Whitney Canada Corp.
- Payank Patel
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Application
METHOD FOR OPTIMISING THE ROUGHNESS OF A ROLLING MILL ROLL BY MEANS...
- Publication number 20240401182
- Publication date Dec 5, 2024
- MECANIZACION INDUSTRIAL ASTILLERO, S.A.
- Gregorio FUENTEVILLA DIAZ
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
FLAME DOPING METHOD
- Publication number 20240234147
- Publication date Jul 11, 2024
- Research & Business Foundation Sungkyunkwan University
- Jung Kyu KIM
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
METHOD FOR MANUFACTURING A PART COMPRISING A METAL SUBSTRATE COVERE...
- Publication number 20240218494
- Publication date Jul 4, 2024
- SAFRAN LANDING SYSTEMS
- Francis MONERIE-MOULIN
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
SUSPENSION FOR THERMAL SPRAY COATINGS
- Publication number 20240167141
- Publication date May 23, 2024
- TREIBACHER INDUSTRIE AG
- Nora GARABNE-ABRAHAM
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
DENSE THICK ALLOY COATING WITHOUT LAYERED ORGANIZATIONAL STRUCTURE...
- Publication number 20240167142
- Publication date May 23, 2024
- BGRIMM Technology Group,Ltd.
- Yueguang Yu
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
MATERIAL FOR THIN, SMOOTH, AND HIGH-VELOCITY FLAME SPRAYED COATINGS...
- Publication number 20240141472
- Publication date May 2, 2024
- OERLIKON METCO (US) INC.
- Jonathan GUTLEBER
- B22 - CASTING POWDER METALLURGY
Information Patent Application
FLAME DOPING METHOD
- Publication number 20240136188
- Publication date Apr 25, 2024
- Research & Business Foundation Sungkyunkwan University
- Jung Kyu KIM
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
SYSTEM AND METHOD FOR APPLYING HIGH TEMPERATURE CORROSION RESISTANT...
- Publication number 20240043976
- Publication date Feb 8, 2024
- LIQUIDMETAL COATINGS ENTERPRISES, LLC.
- John KANG
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
SURFACE-TREATED INTERVERTEBRAL FUSION CAGE
- Publication number 20240033102
- Publication date Feb 1, 2024
- Ming Chi University of Technology
- PIN-YI CHEN
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
Vitreous Coating Application by Induction Heating and Integration w...
- Publication number 20240026547
- Publication date Jan 25, 2024
- AmpClad Coating Technologies Inc.
- David Grant Lingnau
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
COMPOSITE COATING, PISTON, ENGINE AND VEHICLE
- Publication number 20240026837
- Publication date Jan 25, 2024
- Weichai Power Co., Ltd.
- Fei MA
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
METHOD FOR APPLYING THERMAL BARRIER COATING AND HEAT-RESISTANT MEMBER
- Publication number 20230374643
- Publication date Nov 23, 2023
- MITSUBISHI HEAVY INDUSTRIES AERO ENGINES, LTD.
- Yoshifumi OKAJIMA
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
METHOD FOR APPLYING THERMAL BARRIER COATING AND HEAT-RESISTANT MEMBER
- Publication number 20230374644
- Publication date Nov 23, 2023
- MITSUBISHI HEAVY INDUSTRIES AERO ENGINES, LTD.
- Yoshifumi OKAJIMA
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
THERMAL SPRAY PARTICLE, METHOD FOR PRODUCING THERMAL SPRAY PARTICLE...
- Publication number 20230313357
- Publication date Oct 5, 2023
- AGC Inc.
- Yasunari ISHIKAWA
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
SOLUBLE METAL SEALING RING WITH CONTROLLABLE DISSOLUTION RATE AND P...
- Publication number 20230265923
- Publication date Aug 24, 2023
- SOUTHWEST PETROLEUM UNIVERSITY
- Xiaohong Wang
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Application
NiCrBSi-ZrB2 METAL CERAMIC POWDER, COMPOSITE COATING FOR HIGH TEMPE...
- Publication number 20230193445
- Publication date Jun 22, 2023
- Anhui University of Technology
- Shihong ZHANG
- B22 - CASTING POWDER METALLURGY
Information Patent Application
THIN COATINGS FOR HYDRAULIC COMPONENTS
- Publication number 20230175111
- Publication date Jun 8, 2023
- Caterpillar Inc.
- Daniel Joseph Sordelet
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
COATING MATERIAL OF KILN FOR PRODUCTION OF ACTIVE MATERIAL AND KILN...
- Publication number 20230110681
- Publication date Apr 13, 2023
- L & F CO., LTD.
- Jun Ho SHIN
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
Antimicrobial Products Containing Silver and Copper Particles
- Publication number 20230097291
- Publication date Mar 30, 2023
- SILVER PARTICLE COMPANY LIMITED
- Yuen Keung, Raymond CHIN
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
ABRADABLE COATING
- Publication number 20230089114
- Publication date Mar 23, 2023
- SAFRAN AIRCRAFT ENGINES
- Guillaume FRADET
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
METHOD FOR OBTAINING ROLLING MILL ROLLS WITH A COATING OF TUNGSTEN...
- Publication number 20230042220
- Publication date Feb 9, 2023
- MECANIZACION INDUSTRIAL ASTILLERO, S.A.
- Gregorio FUENTEVILLA DIAZ
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
COATED PIPE RESISTANT TO CASING WEAR
- Publication number 20230024535
- Publication date Jan 26, 2023
- VALLOUREC OIL AND GAS FRANCE
- Xavier MENCAGLIA
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
BRAKING BAND OF A DISK FOR DISK BRAKE
- Publication number 20230018275
- Publication date Jan 19, 2023
- BREMBO S.p.A.
- Salvatore GIAMMARINARO
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
Thin and Texturized Films Having Fully Uniform Coverage of a Non-Sm...
- Publication number 20230015719
- Publication date Jan 19, 2023
- Ardy S Kleyman
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
OXIDATION RESISTANT BOND COAT LAYERS, PROCESSES FOR COATING ARTICLE...
- Publication number 20220411912
- Publication date Dec 29, 2022
- Raytheon Technologies Corporation
- Xia Tang
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
ALUMINUM ALLOY HUB AND METHOD FOR COATING SURFACE OF ALUMINUM ALLOY...
- Publication number 20220403496
- Publication date Dec 22, 2022
- CITIC DICASTAL CO., LTD
- Ziguang LIU
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...

Flame spraying

Industry

Parent Industries

Current Industry

Patents Grantslast 30 patents

NiCrBSi—ZrB2 metal ceramic powder, composite coating for high tempe...

Oxidation resistant bond coat layers, processes for coating article...

Antimicrobial products containing silver and copper particles

Abradable coating

Insulation layer on steel pistons

Aluminum alloy hub and method for coating surface of aluminum alloy...

Composite coating, piston, engine and vehicle

High velocity oxy air fuel thermal spray apparatus

Thin and texturized films having fully uniform coverage of a non-sm...

Type 8 heater mat

One-step methods for creating fluid-tight, fully dense coatings

Wind turbine transmission

Method to manufacture a component for a machine for the production...

Thin coatings for hydraulic components

Solvent-free processing of lithium lanthanum zirconium oxide coated...

Wear resistant layer

Soluble metal sealing ring with controllable dissolution rate and p...

System and method for applying high temperature corrosion resistant...

Method of making a brake disc and brake disc for a disc brake

Vitreous coating application by induction heating and integration w...

Poppet valve

Method of manufacturing a sensor element for a potentiometric sensor

Spray plume position feedback for robotic motion to optimize coatin...

Brake disk and method for producing a brake disk

Iron-based alloy powder and molded article using same

Method for obtaining rolling mill rolls with a coating of tungsten...

Environmental barrier coating with oxygen-scavenging particles havi...

High velocity spray torch for spraying internal surfaces

Method for making a brake disc and brake disc for disc brake

Multicomponent alloy coating

Patents Applicationslast 30 patents

COATING FOR HYDRAULIC RODS AND OTHER SLIDING COMPONENTS AND METHOD...

High Entropy Alloy Repair of Nickel and Cobalt Superalloys

CoCr Alloy Carbide Composite Coatings for High-Temperature Applicat...

Manufacturing of Wear Resistant Coatings

METHOD FOR OPTIMISING THE ROUGHNESS OF A ROLLING MILL ROLL BY MEANS...

FLAME DOPING METHOD

METHOD FOR MANUFACTURING A PART COMPRISING A METAL SUBSTRATE COVERE...

SUSPENSION FOR THERMAL SPRAY COATINGS

DENSE THICK ALLOY COATING WITHOUT LAYERED ORGANIZATIONAL STRUCTURE...

MATERIAL FOR THIN, SMOOTH, AND HIGH-VELOCITY FLAME SPRAYED COATINGS...

FLAME DOPING METHOD

SYSTEM AND METHOD FOR APPLYING HIGH TEMPERATURE CORROSION RESISTANT...

SURFACE-TREATED INTERVERTEBRAL FUSION CAGE

Vitreous Coating Application by Induction Heating and Integration w...

COMPOSITE COATING, PISTON, ENGINE AND VEHICLE

METHOD FOR APPLYING THERMAL BARRIER COATING AND HEAT-RESISTANT MEMBER

METHOD FOR APPLYING THERMAL BARRIER COATING AND HEAT-RESISTANT MEMBER

THERMAL SPRAY PARTICLE, METHOD FOR PRODUCING THERMAL SPRAY PARTICLE...

SOLUBLE METAL SEALING RING WITH CONTROLLABLE DISSOLUTION RATE AND P...

NiCrBSi-ZrB2 METAL CERAMIC POWDER, COMPOSITE COATING FOR HIGH TEMPE...

THIN COATINGS FOR HYDRAULIC COMPONENTS

COATING MATERIAL OF KILN FOR PRODUCTION OF ACTIVE MATERIAL AND KILN...

Antimicrobial Products Containing Silver and Copper Particles

ABRADABLE COATING

METHOD FOR OBTAINING ROLLING MILL ROLLS WITH A COATING OF TUNGSTEN...

COATED PIPE RESISTANT TO CASING WEAR

BRAKING BAND OF A DISK FOR DISK BRAKE

Thin and Texturized Films Having Fully Uniform Coverage of a Non-Sm...

OXIDATION RESISTANT BOND COAT LAYERS, PROCESSES FOR COATING ARTICLE...

ALUMINUM ALLOY HUB AND METHOD FOR COATING SURFACE OF ALUMINUM ALLOY...