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High-temperature-resistant, oxidation-resistant and ablation-resistant niobium alloy material and preparation method thereof

An anti-oxidation and ablation-resistant technology, applied in the field of materials, can solve problems such as unusable, rapid peeling, and failure of niobium-based alloys, and achieve the effects of expanding the application range, highlighting heat insulation and cooling, anti-oxidation and anti-ablation performance

Pending Publication Date: 2022-03-11
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in aerospace applications, the working environment temperature of niobium-based alloys usually exceeds 1000 °C, and metal niobium will be oxidized to form niobium pentoxide (Nb 2 o 5 ), and due to the difference in thermophysical properties between metallic niobium and niobium pentoxide, niobium oxide flakes off rapidly from the surface of metallic niobium, thus rendering niobium-based alloys unusable

Method used

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  • High-temperature-resistant, oxidation-resistant and ablation-resistant niobium alloy material and preparation method thereof
  • High-temperature-resistant, oxidation-resistant and ablation-resistant niobium alloy material and preparation method thereof
  • High-temperature-resistant, oxidation-resistant and ablation-resistant niobium alloy material and preparation method thereof

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Embodiment 1

[0028] The invention provides a niobium alloy material with high temperature resistance, oxidation resistance and ablation resistance and a preparation method thereof. refer to figure 1 , according to an embodiment of the present invention, comprising a niobium-based alloy substrate, on which a 2-layer gradient coating material is prepared, the gradient coating material is composed of a metal layer and an oxide layer, and the metal layer material has a particle size of 30- 70μm spherical metal tantalum powder, the thickness of the metal layer is 150μm, and the oxide layer is tantalum oxide ceramics.

[0029] Specifically: (1) Prepare a tantalum metal layer with a thickness of 100 μm on the surface of the niobium-based alloy substrate by cold spraying, and the metal tantalum used is spherical metal tantalum powder with a particle size of 30-70 μm; Working gas, spraying pressure 0.76MPa, spraying distance 30mm, spraying temperature 1000°C, powder feeding rate 40g / min.

[0030]...

Embodiment 2

[0033] The difference between this embodiment 2 and embodiment 1 is that it includes a niobium-based alloy substrate, and two layers of gradient coating materials are prepared on the niobium-based alloy substrate. The gradient coating material is composed of a metal layer and an oxide layer, and the metal layer material is granular Spherical metal aluminum powder with a diameter of 30-70 μm, the thickness of the metal layer is 20 μm, and the oxide layer is alumina ceramics.

[0034] Specifically: (1) Prepare an aluminum metal layer with a thickness of 20 μm on the surface of the niobium-based alloy substrate by cold spraying, and the metal aluminum used is spherical metal aluminum powder with a particle size of 30-70 μm; Working gas, spraying pressure 0.76MPa, spraying distance 30mm, spraying temperature 1000°C, powder feeding rate 40g / min.

[0035] (2) Place the sprayed aluminum metal layer material in the air for a period of time to oxidize the metal aluminum, and a dense al...

Embodiment 3

[0038] The difference between this embodiment 3 and embodiments 1 and 2 is that: a niobium-based alloy substrate is included, and three layers of gradient coating materials are prepared on the niobium-based alloy substrate. The gradient coating material is composed of a metal layer and an oxide layer, and the metal layer The material is spherical metal tantalum, aluminum and magnesium powders with a particle size of 30-70 μm, the thickness of the metal layer is 100 μm, and the oxide layer is tantalum oxide, aluminum oxide and magnesium oxide ceramics.

[0039] Specifically: (1) Prepare a tantalum metal layer with a thickness of 100 μm on the surface of the niobium-based alloy substrate by cold spraying. The metal tantalum used is spherical metal tantalum powder with a particle size of 30-70 μm; Working gas, spraying pressure 0.76MPa, spraying distance 30mm, spraying temperature 1000°C, powder feeding rate 40g / min.

[0040] (2) Place the sprayed tantalum metal layer material in...

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Abstract

The invention discloses a high-temperature-resistant, oxidation-resistant and ablation-resistant niobium alloy material and a preparation method thereof, the high-temperature-resistant, oxidation-resistant and ablation-resistant niobium alloy material comprises a niobium-based alloy matrix, multiple layers of gradient coating materials are prepared on the niobium-based alloy matrix, each layer of gradient coating material is composed of a metal layer and an oxidation layer, and the total thickness of the metal layer is 40-300 microns. The working limit of a traditional niobium alloy material is broken through, and the high temperature resistance, oxidation resistance and ablation resistance of the niobium alloy material are improved; the long-term service temperature of the niobium-based alloy is increased to 2000 DEG C or above, and the working limit of a traditional niobium alloy material is remarkably improved.

Description

technical field [0001] The invention relates to the technical field of materials, in particular to a niobium alloy material with high temperature resistance, oxidation resistance and ablation resistance and a preparation method thereof. Background technique [0002] Metal niobium is a refractory metal with a melting point of over 2400°C and has extremely high strength in a very high temperature range (1000-1470°C). At the same time, metal niobium has excellent plasticity, good processing and welding performance, so it can be manufactured into thin plates And parts with complex shapes are often used as thermal protection and structural materials in the aerospace field. However, in aerospace applications, the working environment temperature of niobium-based alloys usually exceeds 1000 °C, and metal niobium will be oxidized to form niobium pentoxide (Nb 2 o 5 ), and due to the difference in thermophysical properties between metallic niobium and niobium pentoxide, niobium oxid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/00C23C24/04C23C8/10
CPCC23C28/322C23C28/3455C23C28/345C23C28/42C23C24/04C23C8/10
Inventor 冯晶陈琳张陆洋王建坤郭俊
Owner KUNMING UNIV OF SCI & TECH
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