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Multilayered coatings with diamond-like carbon

Inactive Publication Date: 2015-01-01
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a special coating for metal surfaces that consists of multiple layers. The first layer sticks to the metal surface, and the top layer has a very smooth surface. One of the layers is made of diamond-like carbon. This coating can provide better adhesion and smoother surfaces for metal parts. The technical effect of this patent is improved surface quality and durability of metal parts.

Problems solved by technology

In operation, compressor blades may be subject to mechanical stresses and harsh operating conditions because of the rotational velocity of the compressor.
These levels of stress combined with other operating conditions may affect the experienced levels of erosion or corrosion.
Some components may further be subject to mixtures of hydrocarbon-based lubricating oils, carbonaceous soot, dirt, rust and the like.
However, some tough but smooth coatings such as diamond like carbons can experience high levels of internal compressive stresses as thickness increases.

Method used

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  • Multilayered coatings with diamond-like carbon
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  • Multilayered coatings with diamond-like carbon

Examples

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Embodiment Construction

[0013]One or more specific embodiments of the present invention will be described below. In an effort to provide a concise description of these embodiments, all features of an actual implementation may not be described in the specification. It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the specific goals of developers, such as compliance with system-related and business-related constraints, which may vary from one implementation to another. Moreover, it should be appreciated that such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure.

[0014]When introducing elements of various embodiments of the present invention, the articles “a,”“an,”“the,” and “said” are intended to mean that th...

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Abstract

Multilayered coatings include an adhesion base layer that can adhere to a metal substrate, and a top surface layer that has a surface roughness of less than or equal to about Ra 0.0254 μm, wherein at least one of the layers comprises a diamond-like carbon.

Description

BACKGROUND OF THE INVENTION[0001]The subject matter disclosed herein relates to multilayered coatings and, more specifically, to multilayered coatings with diamond-like carbon that can be applied to compressor blades of turbines.[0002]In a gas turbine engine, the compressor section generally includes multiple stages that have a row of compressor blades (also referred to as “rotor blades” or “rotor airfoils”) and stator blades (also referred to as “stator airfoils”). The compressor blades rotate about a rotor and, thusly, impart kinetic energy to the airflow through the compressor. Directly following the row of compressor blades is a row of stator blades, which remain stationary. Acting in concert, the compressor blades and stator blades turn the airflow and slow the air velocity, respectively, which can increase the static pressure of the airflow through the compressor section. Multiple stages of compressors blades and stator blades can be stacked in an axial flow compressor to achi...

Claims

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Application Information

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IPC IPC(8): C23C28/00
CPCC23C28/343C23C28/046C23C28/42F01D5/288F05D2250/62F05D2300/224F05D2300/506Y10T428/24355
Inventor KRISHNA, KALAGA MURALIPARAKALA, PADMAJAPABLA, SURINDER SINGHANAND, KRISHNAMURTHY
Owner GENERAL ELECTRIC CO