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A kind of nb-si-ti-b-al-cr composite material and preparation method thereof

A composite material, nb-si-ti-b-al-cr technology, applied in the field of composite material preparation, can solve the requirements that cannot meet the requirements of ultra-high temperature and harsh environment use, limit the freedom of material components and microstructure design, and restrict Aerospace technology development and other issues, to achieve unique physical properties, improve high temperature oxidation resistance, high elastic modulus

Inactive Publication Date: 2017-12-05
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high-temperature oxidation of refractory metal materials limits its application. This is because the main damage form of refractory metals is oxidation during service in ultra-high temperature and harsh environments. At present, a particularly effective solution has not been found, and its Oxidation mechanism is still unclear; meanwhile, high temperature oxidation resistance requirements limit the design freedom of material composition and microstructure
In addition, refractory metals have experienced the combined effect of thermal shock or long-term thermal fatigue under the long-term dynamic thermal / mechanical coupling load conditions in ultra-high temperature extreme environments. The existing strengthening and toughening mechanisms of the materials themselves may lost its effect
Therefore, traditional single-phase refractory metal materials cannot meet the requirements of ultra-high temperature and harsh environments, and become a bottleneck restricting the development of aerospace technology.

Method used

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  • A kind of nb-si-ti-b-al-cr composite material and preparation method thereof
  • A kind of nb-si-ti-b-al-cr composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] In this example, the Nb-Si-Ti-B-Al-Cr composite material is made of the following atomic percentages: Si 15%, Ti 15%, B 4%, Al 6%, Cr 5%, and the balance is Nb and not Avoid impurities.

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

[0025] Step 1. Put silicon powder, titanium powder, boron powder, aluminum powder, chromium powder and niobium powder in a ball mill, mix them uniformly by wet ball milling, then dry them under vacuum conditions, and pulverize them to obtain mixed powder material; preferably, 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 boron powder is not less than 99.9%, and the mass purity of the aluminum powder is not less than 99%, the mass purity of the chromium powder is not less than 99.9%, the mass purity of the niobium powder is not less than 99.9%, the particle size...

Embodiment 2

[0033] In this example, the Nb-Si-Ti-B-Al-Cr composite material is made of the following atomic percentages: Si 6%, Ti3%, B 1%, Al 3%, Cr 2%, and the balance is Nb and not Avoid impurities.

[0034] The method for preparing the Nb-Si-Ti-B-Al-Cr composite material in this embodiment comprises the following steps:

[0035] Step 1. Put silicon powder, titanium powder, boron powder, aluminum powder, chromium powder and niobium powder in a ball mill, mix them uniformly by wet ball milling, then dry them under vacuum conditions, and pulverize them to obtain mixed powder material; preferably, 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 boron powder is not less than 99.9%, and the mass purity of the aluminum powder is not less than 99%, the mass purity of the chromium powder is not less than 99.9%, the mass purity of the niobium powder is not less than 99.9%, the particle size of...

Embodiment 3

[0039] In this example, the Nb-Si-Ti-B-Al-Cr composite material is made of the following atomic percentages: Si 20%, Ti 25%, B 10%, Al 15%, Cr 10%, and the balance is Nb and not Avoid impurities.

[0040] The method for preparing the Nb-Si-Ti-B-Al-Cr composite material in this embodiment comprises the following steps:

[0041] Step 1. Put silicon powder, titanium powder, boron powder, aluminum powder, chromium powder and niobium powder in a ball mill, mix them uniformly by wet ball milling, then dry them under vacuum conditions, and pulverize them to obtain mixed powder material; preferably, 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 boron powder is not less than 99.9%, and the mass purity of the aluminum powder is not less than 99%, the mass purity of the chromium powder is not less than 99.9%, the mass purity of the niobium powder is not less than 99.9%, the particle s...

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Abstract

The invention discloses a Nb-Si-Ti-B-Al-Cr composite material, which is characterized in that it is made of raw materials with the following atomic percentages: Si 6%-20%, Ti 3%-25%, B 1% ~10%, Al 3%~15%, Cr 2%~10%, the balance is Nb and unavoidable impurities. In addition, the present invention also discloses a method for preparing the Nb-Si-Ti-B-Al-Cr composite material, the method is as follows: 1. Put silicon powder, titanium powder, boron powder, aluminum powder, chromium powder and niobium powder Mix evenly in a ball mill, dry and pulverize to obtain mixed powder; 2. Put the mixed powder in a hot-press sintering furnace for hot-press sintering to obtain Nb-Si-Ti-B-Al-Cr composite material. The Nb-Si-Ti-B-Al-Cr composite material of the present invention has the characteristics of high strength, high toughness and high temperature oxidation resistance, and can be applied in an air environment of 1200°C.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and in particular relates to a Nb-Si-Ti-B-Al-Cr composite material and a preparation method thereof. Background technique [0002] Due to the advantages of high melting point, high strength, good room temperature plasticity, corrosion resistance and easy processing and forming, refractory metals have been applied in high-temperature environments such as aviation, aerospace, and nuclear industries, and are one of the most important ultra-high temperature structural materials. one. However, the high-temperature oxidation of refractory metal materials limits its application. This is because the main damage form of refractory metals is oxidation during service in ultra-high temperature and harsh environments. At present, a particularly effective solution has not been found, and its The oxidation mechanism is still unclear; at the same time, high-temperature oxidation resistanc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C27/02C22C1/05
Inventor 李来平喻吉良张如郑欣夏明星王峰裴雅
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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