Metal ceramic composite material used at temperature less than 1,200 DEG C

A composite material and cermet technology, applied in the field of composite materials, can solve problems such as hindering wide application, poor reliability, and high brittleness of ceramics, and achieve the effects of small residual stress, buffer load and deflection crack, and small fiber damage.

Active Publication Date: 2014-04-16
SUZHOU HONGJIU AVIATION THERMAL MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the Achilles heel of ceramics, such as high brittleness and poor reliability, has long hindered its wide application. Therefore, people have been exploring ways to toughen ceramics for many years, and major breakthroughs have been made in recent years.

Method used

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  • Metal ceramic composite material used at temperature less than 1,200 DEG C
  • Metal ceramic composite material used at temperature less than 1,200 DEG C

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Embodiment 1

[0018] Carbon fibers and nickel-chromium-nickel-silicon alloy wires are plied and twisted, and woven into a three-dimensional preform through three-dimensional weaving technology, and the fiber content is controlled to 60%; the carbon interface layer is prepared by the CVI method, and the thickness of the interface layer is controlled by relevant process parameters. 0.3 μm; and then in the same CVI equipment, trichloromethylsilane is used as a precursor to decompose SiC under appropriate conditions to fill the gaps of the preform densely to form a metal-ceramic composite material.

Embodiment 2

[0020] Combine carbon fibers and nickel-chromium-nickel-silicon alloy wires into bundles, first weave them into two-dimensional cloth, and then wind the cloth into tubes or other three-dimensional shapes, and control the fiber content to 70%; prepare the BN interface layer by the CVI method, and pass the relevant process parameters The thickness of the interfacial layer is controlled to 0.5 μm; then in the same CVI equipment, trichloromethylsilane is used as the precursor, and SiC is decomposed under appropriate conditions to fill the gaps of the preform densely to form a metal-ceramic composite material.

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Abstract

The invention discloses a metal ceramic composite material used at a temperature less than 1,200 DEG C. The material is characterized by comprising the following steps: firstly, weaving mixed metal wires and fibers into a preformed body, permeating a deposited interface layer on the fiber surface of the preformed body by using a CVI (Chemical Vapor Infiltration) method, and further preparing an Sic ceramic matrix by using a CVI technique so as to finally prepare the metal ceramic composite material. The preformed body is formed by weaving mixed carbon fibers with nickel-chromium-nickel-silicon alloy wires; the carbon fibers and the alloy wires can be independently woven, or can be also combined and kneaded into bundles and are subsequently woven; the interface layer consists of carbon or BN (Boron Nitride) adopting a layered structure; the thickness of the carbon interface layer is 0.1-0.3 [mu]m; the thickness of the BN interface layer is 0.3-0.5 [mu]m; the Sic ceramic matrix accounts for 30-50% of the total volume of the composite material. The layered interface layer can be used as a baffle layer, and has the functions of conducting load, deflecting crack and relieving thermal mismatch.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a cermet composite material used below 1200°C. Background technique [0002] Ceramic matrix composites have excellent properties such as high specific strength, high specific modulus, high temperature resistance, and oxidation resistance. Become an important branch of high-tech new materials. [0003] However, the Achilles heel of ceramics, such as high brittleness and poor reliability, has long hindered its wide application. Therefore, people have been exploring ways to toughen ceramics for many years, and major breakthroughs have been made in recent years. The application of ceramic matrix composites (CMC) in aerospace thermal structural parts proves that the development of continuous fiber toughened CMC is an effective way to improve the brittleness and reliability of ceramics, which can make CMC have a metal-like fracture behavior and be insensitive to cracks. No catastro...

Claims

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Application Information

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IPC IPC(8): C04B35/76C04B35/565
Inventor 陈照峰聂丽丽
Owner SUZHOU HONGJIU AVIATION THERMAL MATERIALS TECH CO LTD
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