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Improved interface coating for ceramic fibers

An interfacial coating, ceramic fiber technology, applied in fiber processing, fiber chemical characteristics, textiles and papermaking, etc., can solve the problems of undeveloped fiber-reinforced composite materials, lack of interface coatings, etc.

Inactive Publication Date: 2001-09-26
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Although ceramic fibers and their matrix can maintain their mechanical properties in an oxidizing atmosphere with a temperature above 1000 °C, fiber-reinforced composites that can withstand the same conditions have not been developed so far due to the lack of suitable interface coatings.

Method used

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  • Improved interface coating for ceramic fibers
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Embodiment Construction

[0009] The interface coating of the present invention is realized with the co-deposition method of silicon and boron nitride, and its condition will make silicon nitride exist substantially without free silicon, form the (silicon and boron) nitride interface coating of high temperature pyrolysis, Its composition is BSi x N 1+1.33x , hereinafter referred to as PB(Si)N. The coating appears glassy or amorphous under x-diffraction, and the silicon and boron are evenly distributed throughout the deposit. The anti-oxidation and anti-hydrolysis properties of the interface coating are better than those of the traditional boron nitride coating, and the substrate of the non-oxide silicon carbide or silicon nitride fiber is peeled off well. The term "silicon nitride fiber" includes any continuous fiber (ie, having a ratio of in-use length to diameter above 1000) and consisting of at least 50% by volume silicon and carbon. These include, but are not limited to, the SCS-monofilament ser...

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Abstract

An improved interface coating for a fibrous material composed of a silicon-containing boron nitride having the general composition BSixN1+1.33x and containing from 2 wt.% to 42 wt.% of silicon, with substantially no free silicon present. The coating is formed by CVD using reactant vapors of ammonia and a gaseous source of both boron and silicon which flow into the furnace chamber at a controlled flow ratio to nitride the deposit to form the complex coating.

Description

field of invention [0001] The invention relates to a ceramic fiber improved interface coating, more specifically, a reinforced ceramic fiber composite, and relates to a process for making a ceramic fiber interface coating with high temperature resistance to 1500°C oxidation and hydrolysis resistance method. Background of the invention [0002] Ceramic fibers have attracted much attention due to their high mechanical strength and resistance to chemical attack, which can be used in various applications. For example, it can be used as a reinforcing material for aircraft engine components and structures, and burners and radiant combustion components. However, to achieve the desired performance in an oxidizing environment, an interfacial coating is required on the fiber to form a surface that remains distinct from the matrix that constitutes the composite. In other words, it is to reinforce the matrix with fibers without allowing them to diffuse into the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/626C04B35/628C04B35/80D01F9/10D06M11/00D06M11/80
CPCC04B2235/9684C04B35/62897C04B2235/5244C04B2235/524C04B35/62894C04B35/62844C04B2235/5264C04B35/62871C04B35/62884C04B35/62868C04B2235/5248C04B35/62863
Inventor A·W·摩尔M·B·道尔
Owner GENERAL ELECTRIC CO