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Base-containing high-entropy alloy composite and preparation method thereof

A technology of high-entropy alloys and composite materials, applied in the field of high-entropy alloys and their preparation, can solve the problems of inability to improve mechanical strength and plasticity, high brittleness, etc., and achieve excellent comprehensive mechanical properties and broad application prospects

Active Publication Date: 2018-09-07
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to solve the problems that the existing high-entropy alloys cannot improve the mechanical strength and plasticity and have high brittleness, and provide a base-based high-entropy alloy composite material and its preparation method

Method used

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  • Base-containing high-entropy alloy composite and preparation method thereof
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  • Base-containing high-entropy alloy composite and preparation method thereof

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specific Embodiment approach 1

[0023] Specific Embodiment 1: This embodiment is a base-based high-entropy alloy composite material prepared from 1% to 20% of the reinforcement phase and 80% to 99% of the base-based high-entropy alloy matrix according to the mass percentage; the reinforcement phase TiC, TiB 2 , TiB, B 4 C or Al 2 o 3 ; The base-based high-entropy alloy matrix is ​​composed of 50% to 90% alloy matrix and 10% to 50% alloying elements by mass fraction; the alloy matrix is ​​Fe, Al, Cr, Ni, Co, Cu, One or two elements in Ti, Mn, Mo, Zr, Hf, Nb and Sn; the alloying elements are Fe, Al, Cr, Ni, Co, Cu, Ti, Mn, Mo, Zr , Hf, Nb, and Sn, or two or more elements; when the alloy matrix is ​​composed of two elements, the molar ratio between the two elements is b, and the range of b is 0.5≤b≤ 2. The molar ratio between any two elements of the alloying elements is a, and a satisfies: 0.8≤a≤1.25.

specific Embodiment approach 2

[0024] Specific embodiment two: This embodiment is a method for preparing a base-based high-entropy alloy composite material, which is completed in the following steps:

[0025] 1. Weighing 1% to 20% of the reinforcing phase and 80% to 99% of the base-based high-entropy alloy matrix according to the mass percentage to obtain the base-based high-entropy alloy composite material raw material;

[0026] The reinforcement phase described in step 1 is TiC, TiB 2 , TiB, B 4 C or Al 2 o 3 ;

[0027] The base-based high-entropy alloy matrix described in step 1 is composed of 50% to 90% alloy matrix and 10% to 50% alloying elements by mass fraction; the alloy matrix is ​​Fe, Al, Cr, Ni, Co, One or two elements in Cu, Ti, Mn, Mo, Zr, Hf, Nb and Sn; the alloying elements are Fe, Al, Cr, Ni, Co, Cu, Ti, Mn, Mo , Zr, Hf, Nb and Sn, or two or more of them; when the alloy matrix is ​​composed of two elements, the molar ratio between the two elements is b, and the range of b is 0.5≤ b≤2;...

specific Embodiment approach 3

[0033] Embodiment 3: The difference between this embodiment and Embodiment 2 is that in step 1, 10% of the reinforcement phase and 90% of the base-based high-entropy alloy matrix are weighed by mass percentage to obtain the base-based high-entropy alloy composite material raw material. Other steps are the same as in the second embodiment.

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Abstract

The invention discloses a base-containing high-entropy alloy composite and a preparation method thereof, and relates to a high-entropy alloy and a preparation method. The base-containing high-entropyalloy composite and the preparation method aim at solving the problems that the mechanical strength and the plasticity of an existing high-entropy alloy can not be improved, and the fragility is high.The base-containing high-entropy alloy composite is formed by preparing the following components of, by mass percentage, 1-20% of reinforced phase and 80-99% of base-containing high-entropy alloy matrix. The preparation method comprises the following steps that one, a raw base-containing high-entropy alloy composite is weighed; and two, the raw base-containing high-entropy alloy composite weighedin the Step one is smelted by an electric arc smelting method or an induction smelting method, and a base-containing high-entropy alloy is obtained. The yield strength of the prepared base-containinghigh-entropy alloy composite is 1200-2100 Mpa, the breaking strength is 2300-4000 MPa, and the limiting strain epsilon p (%) is 20-50%. The base-containing high-entropy alloy composite can be obtained.

Description

technical field [0001] The invention relates to a high-entropy alloy and a preparation method thereof. Background technique [0002] In 2004, Taiwan scholar Ye Junwei jumped out of the traditional thinking pattern of alloy design and first proposed the design idea of ​​high-entropy alloys. High-entropy alloys are defined as: a new type of multi-principal alloy with the number of constituent elements n ≥ 5, each element having an equimolar ratio or nearly equimolar ratio, and the atomic percentage of all elements not exceeding 35%. Since it was proposed, high-entropy alloys have been widely studied at home and abroad because of their excellent mechanical properties at room temperature and high temperature, corrosion resistance, oxidation resistance, and electromagnetic properties, and their application prospects are very broad. [0003] In 2008, Professor Li Bangsheng of Harbin Institute of Technology took the lead in developing high-entropy alloy-based composite materials o...

Claims

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Application Information

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IPC IPC(8): C22C1/10C22C1/02C22C32/00C22C38/06C22C38/40C22C33/04
CPCC22C1/1036C22C32/00C22C33/04C22C38/06C22C38/40
Inventor 李邦盛周扬张璐晋玺杜兴宇毕娟
Owner HARBIN INST OF TECH
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