High-strength and high-toughness TaxHf1-xC-based composite material and preparation method thereof

A taxhf1-xc, composite material technology, which is applied in the field of ultra-high temperature resistant materials, can solve the problems of poor toughness of C-based composite materials, cannot meet urgent needs, etc., to ensure service life and reliability, anti-oxidation performance and anti-ablation. Excellent performance

Active Publication Date: 2021-02-12
NAT UNIV OF DEFENSE TECH
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  • Application Information

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Problems solved by technology

[0004] The invention provides a high-strength and high-toughness Ta x f 1-x C-based composite material and preparation method thereof, used to overcome Ta in the prior art x f 1-x C-based composite materials have poor toughness and cannot meet the urgent needs of high-performance thermal structural materials for equipment in extreme thermal environments.

Method used

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  • High-strength and high-toughness TaxHf1-xC-based composite material and preparation method thereof
  • High-strength and high-toughness TaxHf1-xC-based composite material and preparation method thereof
  • High-strength and high-toughness TaxHf1-xC-based composite material and preparation method thereof

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preparation example Construction

[0046] The present invention also proposes a high-strength and high-toughness Ta x f 1-x The preparation method of C-based composite material, comprising:

[0047] S1: Design Ta x f 1-x Layered structure of C-based composite material, said layered structure comprising Ta x f 1-x The C ceramic layer and the metal Ta layer are alternately stacked, and the Ta x f 1-x The upper and lower surfaces of C-based composites are Ta x f 1-x C ceramic layer, and Ta x f 1-x The number of layers and layer thickness ratio of C ceramic layer and metal Ta layer;

[0048] Preferably, the number of layers of the metal Ta layer ≥ 1, the metal Ta layer and Ta x f 1-x The layer thickness ratio of the C ceramic layer is 0.1~1.

[0049] The shape of the metal Ta is at least one of continuous fiber, continuous fiber two-dimensional fabric, ribbon and foil.

[0050] The continuous fiber diameter is 0.3 ~ 0.8 mm;

[0051] The continuous fiber two-dimensional fabric is woven with continuous...

Embodiment 1

[0068] This embodiment provides a high-strength and high-toughness Ta x f 1-x C-based composites, the Ta x f 1-x C-based composites with Ta x f 1-x C ceramics as the substrate, metal Ta as the toughening phase;

[0069] The Ta x f 1-x The C-based composite material is a layered structure, Ta x f 1-x The C ceramic layer and the metal Ta layer are arranged in layers, and the Ta x f 1-x Both the upper and lower surfaces of the C-based composite are Ta x f 1-x C ceramic phase.

[0070] This embodiment also provides a kind of above-mentioned Ta x f 1-x A preparation method for a C-based composite material, comprising the steps of:

[0071] S1: Design Ta x f 1-x The layered structure of C-based composites, including Ta x f 1-x C The ceramic layer and the metal Ta layer are arranged in layers, and the upper surface and the lower surface are both Ta x f 1-x C ceramic phase, Ta x f 1-x C ceramic layer 7 layers and metal Ta layer 6 layers;

[0072] S2: Weigh the ...

Embodiment 2

[0081] This embodiment provides a high-strength and high-toughness Ta x f 1-x C-based composites, the Ta x f 1-x C-based composites with Ta x f 1-x C ceramics as the substrate, metal Ta as the toughening phase;

[0082] The Ta x f 1-x The C-based composite material is a layered structure, Ta x f 1-x The C ceramic layer and the metal Ta layer are arranged in layers, and the Ta x f 1-x Both the upper and lower surfaces of the C-based composite are Ta x f 1-x C ceramic phase.

[0083] This embodiment also provides a kind of above-mentioned Ta x f 1-x A preparation method for a C-based composite material, comprising the steps of:

[0084] S1: Design Ta x f 1-x The layered structure of C-based composites, including Ta x f 1-x C The ceramic layer and the metal Ta layer are arranged in layers, and the upper surface and the lower surface are both Ta x f 1-x C ceramic phase, Ta x f 1-x C ceramic layer 2 layers and metal Ta layer 1 layer;

[0085] S2: Weigh the T...

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Abstract

The invention discloses a high-strength and high-toughness TaxHf1-xC-based composite material and a preparation method thereof. According to the TaxHf1-xC-based composite material, TaxHf1-xC ceramic is used as a substrate, and metal Ta is used as a toughening phase; the TaxHf1-xC-based composite material is of a layered structure, the TaxHf1-xC ceramic layer and the metal Ta layer are arranged ina laminated mode, and the upper surface and the lower surface of the TaxHf1-xC-based composite material are both TaxHf1-xC ceramic phases. The preparation method comprises the steps of designing the structure of the TaxHf1xC-based composite material, paving and filling raw materials according to the designed structure, sintering at high temperature and the like. The TaxHf1-xC-based composite material provided by the invention has the characteristics of high strength and high toughness, can be used in an extreme thermal environment, and can be used as a high-temperature valve of a solid rocketengine, a wing leading edge of a hypersonic flight vehicle and other components. The preparation method provided by the invention is simple and convenient in process and large in material structure design space.

Description

technical field [0001] The invention relates to the technical field of ultra-high temperature resistant materials, in particular to a high-strength and high-toughness Ta x Hf 1-x C-based composite material and preparation method thereof. Background technique [0002] Ta x Hf 1-x C ceramic is a solid solution formed by tantalum carbide (TaC) and hafnium carbide (HfC) at high temperature. Its melting point can reach up to 4300 K, ranking first among all known substances in the world. refractory metals. At the same time, benefiting from the solid solution strengthening effect, Ta x Hf 1-x C ceramics have extremely high hardness, high temperature oxidation resistance, and ablation resistance. They have the potential to serve in extreme heat environments (>3000 K). Excellent candidate materials for other parts. But limited by intrinsic brittleness, Ta x Hf 1-x C ceramics are prone to cracking under the impact of high heat flux, resulting in material failure. Therefo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/76C04B35/56C04B35/645
CPCC04B35/5607C04B35/645C04B35/76C04B2235/602C04B2235/656C04B2235/6562C04B2235/6567C04B2235/6581C04B2235/666C04B2235/96
Inventor 王松肖鹏余艺平
Owner NAT UNIV OF DEFENSE TECH
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