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A kind of nb‑si‑ti‑w‑hf composite material and preparation method thereof

A composite material, nb-si-ti-w-hf technology, applied in the field of Nb-Si-Ti-W-Hf composite material and its preparation, can solve the problems of long cycle and high energy consumption, and achieve short cycle and high energy consumption. The effect of low consumption and density reduction

Inactive Publication Date: 2017-10-17
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, in order to isolate and refine the primary niobium solid solution dendrites and eliminate casting defects in the material, the heat-treated material must be subjected to hot extrusion treatment. This method has the disadvantages of high energy consumption and long cycle time.

Method used

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  • A kind of nb‑si‑ti‑w‑hf composite material and preparation method thereof

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Effect test

Embodiment 1

[0023] The Nb-Si-Ti-W-Hf composite material in this embodiment is made of the following atomic percentages of raw materials: Si 17%, Ti 20%, W 12%, Hf 6%, and the balance is Nb and unavoidable impurities.

[0024] The method for preparing the Nb-Si-Ti-W-Hf composite material in this embodiment comprises the following steps:

[0025] Step 1. Put silicon powder, titanium powder, tungsten powder, hafnium powder and niobium powder in a ball mill, mix them uniformly by means of wet ball milling, then dry them under vacuum conditions, and pulverize them to obtain mixed powders; preferably Specifically, the mass purity of the silicon powder is not less than 99.99%, the mass purity of the titanium powder is not less than 99.99%, the mass purity of the tungsten powder is not less than 99.9%, and the mass purity of the hafnium powder is not less than 99%, The mass purity of the niobium powder is not less than 99.9%, the particle size of the silicon powder is not greater than 5 μm, the p...

Embodiment 2

[0030] The Nb-Si-Ti-W-Hf composite material in this embodiment is made of the following atomic percentages of raw materials: Si 10%, Ti 5%, W 3%, Hf 1%, and the balance is Nb and unavoidable impurities.

[0031] The method for preparing the Nb-Si-Ti-W-Hf composite material in this embodiment comprises the following steps:

[0032] Step 1. Put silicon powder, titanium powder, tungsten powder, hafnium powder and niobium powder in a ball mill, mix them uniformly by means of wet ball milling, then dry them under vacuum conditions, and pulverize them to obtain mixed powders; preferably Specifically, the mass purity of the silicon powder is not less than 99.99%, the mass purity of the titanium powder is not less than 99.99%, the mass purity of the tungsten powder is not less than 99.9%, and the mass purity of the hafnium powder is not less than 99%, The mass purity of the niobium powder is not less than 99.9%, the particle size of the silicon powder is not greater than 5 μm, the parti...

Embodiment 3

[0036] The Nb-Si-Ti-W-Hf composite material in this embodiment is made of the following atomic percentages of raw materials: Si 20%, Ti 30%, W 15%, Hf 10%, and the balance is Nb and unavoidable impurities.

[0037] The method for preparing the Nb-Si-Ti-W-Hf composite material in this embodiment comprises the following steps:

[0038] Step 1. Put silicon powder, titanium powder, tungsten powder, hafnium powder and niobium powder in a ball mill, mix them uniformly by means of wet ball milling, then dry them under vacuum conditions, and pulverize them to obtain mixed powders; preferably Specifically, the mass purity of the silicon powder is not less than 99.99%, the mass purity of the titanium powder is not less than 99.99%, the mass purity of the tungsten powder is not less than 99.9%, and the mass purity of the hafnium powder is not less than 99%, The mass purity of the niobium powder is not less than 99.9%, the particle size of the silicon powder is not greater than 5 μm, the ...

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Abstract

The invention discloses a Nb-Si-Ti-W-Hf composite material, which is made of the following raw materials in atomic percentages: Si 10%-20%, Ti 5%-30%, W 3%-15%, Hf 1 %~10%, the balance is Nb and unavoidable impurities. In addition, the present invention also discloses a method for preparing the Nb-Si-Ti-W-Hf composite material, the method is as follows: 1. After ball milling and mixing silicon powder, titanium powder, tungsten powder, hafnium powder and niobium powder drying and pulverizing to obtain a mixed powder; 2. performing discharge plasma sintering on the mixed powder to obtain a Nb-Si-Ti-W-Hf composite material. The tensile strength of the Nb-Si-Ti-W-Hf composite material of the present invention is 350MPa-500MPa at 1200°C, the tensile strength at 1500°C is 65MPa-85MPa, and the tensile elongation can reach more than 67%. .

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and in particular relates to a Nb-Si-Ti-W-Hf composite material and a preparation method thereof. Background technique [0002] Decades of development history of the aerospace power system proves that the improvement of the thrust-to-weight ratio of the power system strongly depends on the increase of the operating temperature. The higher the operating temperature of the key components at the hot end, the better the performance and efficiency of the power system. The thrust-to-weight ratio of the system has a great relationship with the working temperature of the key components of the hot end. The development of high-temperature materials has made a great contribution to the improvement of the performance of aerospace power systems. After decades of hard work, the service temperature of nickel-based superalloys has increased by 125°C, and its service temperature is 1150°C....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C27/02C22C30/00
Inventor 李来平喻吉良张如郑欣王峰夏明星裴雅
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH