Preparation method of light titanium-rich Ti-Zr-Nb-Al series refractory high-entropy alloy-based composite material

A technology of ti-zr-nb-al and high-entropy alloys, which is applied in the field of preparation of new metal materials, can solve the problems of not being able to prepare large sizes, poor plasticity, and high density of refractory high-entropy alloys, so as to improve plasticity and grain size. Thinning, strengthening effect

Active Publication Date: 2022-01-14
HARBIN INST OF TECH
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of existing refractory high-entropy alloys with high density, poor plasticity, and incapable

Method used

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  • Preparation method of light titanium-rich Ti-Zr-Nb-Al series refractory high-entropy alloy-based composite material
  • Preparation method of light titanium-rich Ti-Zr-Nb-Al series refractory high-entropy alloy-based composite material
  • Preparation method of light titanium-rich Ti-Zr-Nb-Al series refractory high-entropy alloy-based composite material

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specific Embodiment approach 1

[0019] Embodiment 1: In this embodiment, a method for preparing a light-weight titanium-rich Ti-Zr-Nb-Al system refractory high-entropy alloy-based composite material is specifically carried out according to the following steps:

[0020] 1. The elements and atomic ratios contained in high-entropy alloys are: Ti:Zr:Nb:Al=a:b:c:d, and the chemical composition of each element is 25≤a≤40, 25≤b≤35, 25≤c ≤35, 5≤d, a+b+c+d=100; use Ti, Zr, Nb, Al raw materials with a purity of 99.5% or more; weigh the raw materials according to the above ratio, mix and smelt the raw materials into metal ingots, and then pass High energy density plasma rotating electrode atomization technology is used to make powder and obtain matrix powder;

[0021] 2. Weigh the added reinforcement powder; the added reinforcement powder is B powder, TiB 2 Powder, NbB 2 Powder or ZrB 2 pink;

[0022] 3. After mixing the matrix powder and the external reinforcement powder, perform low-energy ball milling in a high-...

specific Embodiment approach 2

[0024] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the diameter of the reinforcement powder added in Step 2 is 1-5 μm. Others are the same as the first embodiment.

specific Embodiment approach 3

[0025] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the added reinforcement powder in step 2 is 1% to 5% of the mass of the matrix powder. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to the field of preparation of novel metal materials, in particular to a preparation method of a light titanium-rich Ti-Zr-Nb-Al series refractory high-entropy alloy-based composite material. The invention aims to solve the problems of high density, poor plasticity and incapability of large-size preparation of an existing refractory high-entropy alloy. The method comprises the steps that firstly, raw materials are weighed according to the proportion, the raw materials are mixed and smelted into metal ingots, powder is prepared through a high-energy-density plasma rotating electrode atomization technology, and matrix powder is obtained; 2, additional reinforcement powder is weighed; 3, the matrix powder and the additional reinforcement powder are mixed, and low-energy ball milling is conducted in a high-purity argon atmosphere to obtain mixed powder; and 4, the mixed powder is subjected to vacuum hot press sintering, a compact block material, namely the light titanium-rich Ti-Zr-Nb-Al series refractory high-entropy alloy-based composite material, is obtained. The method is used for high-temperature structural members.

Description

technical field [0001] The invention relates to the field of preparation of a new type of metal material, in particular to a preparation method of a lightweight titanium-rich Ti-Zr-Nb-Al system refractory high-entropy alloy-based composite material. Background technique [0002] Refractory high-entropy alloys have the characteristics of high melting point, high hardness, high strength, and excellent phase stability at high temperatures. At the same time, they exhibit good mechanical properties at high temperatures, and are expected to provide optional materials for the next generation of high-temperature structural components. However, the principal elements in refractory high-entropy alloys often contain high-melting point and high-density elements such as Zr, Nb, Hf, Ta, Mo, V, etc., which make refractory high-entropy alloys generally have high density and poor plasticity, and generally do not have tensile plasticity. The development of refractory high-entropy alloys in th...

Claims

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Application Information

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IPC IPC(8): C22C49/10C22C49/14C22C47/14B22F9/14B22F9/04B22F3/14C22C101/22
CPCC22C49/10C22C49/14C22C47/14B22F9/14B22F9/04B22F3/14B22F2009/043
Inventor 黄陆军王存玉安琦鲁伟航张芮陈润张宏伟
Owner HARBIN INST OF TECH
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