High-entropy alloy-base composite material and preparation method thereof

A technology of high-entropy alloys and composite materials, applied in the field of alloy-based composite materials and their preparation, can solve the problems of no reports of high-entropy-based composite materials, limited alloys of high-entropy alloys, etc., and achieves easy implementation, simple operation, compressive strength and compression strength. rate increase effect

Inactive Publication Date: 2008-07-09
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current research on high-entropy alloys is mainly limited to the combination of different

Method used

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  • High-entropy alloy-base composite material and preparation method thereof
  • High-entropy alloy-base composite material and preparation method thereof
  • High-entropy alloy-base composite material and preparation method thereof

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specific Embodiment approach 1

[0016] Specific Embodiment 1: The high-entropy alloy-based composite material in this embodiment is made of 1% to 45% of the reinforcement phase and 55% to 99% of the high-entropy alloy matrix by volume percentage; wherein the reinforcement phase is TiC, TiB 2 , TiB, B 4 C. Al 2 o 3 、Ti 3 Al, TiAl, Ti 5 Si 3 、Zr 2 o 3 , AlN or TiN.

[0017] In order to make the alloy form a simple solid solution structure, non-metallic elements must not be introduced into the high-entropy alloy; the invention breaks through this limitation and introduces non-metallic elements into the reinforcing phase. In the present invention, there is a relatively large negative mixing enthalpy among elements of the reinforcing phase, so the reinforcing phase tends to form a cermet phase.

specific Embodiment approach 2

[0018] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the high-entropy alloy matrix is ​​a 5-element, 6-element, 7-element, 8-element, 9-element, 10-element, 11-element, 12-element or 13-element alloy A system in which the elements are composed in equimolar ratios. Others are the same as the first embodiment.

specific Embodiment approach 3

[0019] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the matrix of the high-entropy alloy is 6 elements, and each element is composed in an equimolar ratio. Others are the same as the first embodiment.

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Abstract

The invention provides a high-entropy alloy based composite material and a method for preparation, which relates to an alloy composite material and a method for preparation. The invention provides the high-entropy alloy based composite material and a method for preparation, and a composite material whose comprehensive performance is better than high-entropy alloy. The high-entropy alloy based composite material is made from 1-45 percent of reinforced phase and 55-99 percent of high-entropy alloy base according to the volume percentage. The high-entropy alloy based composite material is prepared by an in-situ spontaneity method or a non- in-situ spontaneity method, and the reinforced phase is prepared in an original position in the high-entropy alloy base or is added from the outer portion. The invention further improves the mechanical properties of materials basing on original high-entropy alloy, and is capable of playing the potentiality of the high-entropy alloy base in maximum limit. The high-entropy alloy based composite material of the invention is capable of being used by various preparation processes, the operation is easy and is easy to operate.

Description

technical field [0001] The invention relates to an alloy-based composite material and a preparation method thereof. Background technique [0002] High-entropy alloys were first developed and studied by Ye Junwei and others in 1995. High-entropy alloys are alloy systems containing multiple main elements (the number of main elements n≥5), that is, multi-principal alloy systems; each main element has a high atomic percentage (5% to 35%), and there is no Any element will exceed 50% (atomic percentage) in quantity, so there is no unique main element. [0003] Multi-principal element high-entropy alloys have excellent properties superior to traditional alloys. Through the design of alloy components, a combination of properties such as high hardness, high temperature creep resistance, high temperature oxidation resistance, corrosion resistance and high electrical resistivity can be obtained. Advantages of potential diversification. However, the current research on high-entropy a...

Claims

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Application Information

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IPC IPC(8): C22C30/00C22C1/02C22C1/05C22C1/04
Inventor 李邦盛王艳苹任明星杨闯
Owner HARBIN INST OF TECH
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