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A kind of high-entropy amorphous matrix composite material and its preparation method

A composite material and amorphous technology, applied in the field of composite materials, can solve the problems of high cooling rate, inability to prepare amorphous alloy, low glass forming ability, etc., and achieve the effect of excellent mechanical properties

Inactive Publication Date: 2018-06-19
TAIYUAN UNIV OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Although the components of high-entropy alloys have high mixing entropy, which satisfies the chaos principle of designing amorphous alloys, most high-entropy alloy systems cannot directly prepare amorphous alloys by rapid cooling due to their low glass-forming ability. , and requires a relatively high cooling rate to prepare
Although a few high-entropy alloys have high glass-forming ability, such as Pd-Pt-Cu-Ni-P, Ti-Zr-Ni-Be-Cu, Sr-Ca-Yb-Mg-Zn, Ti-Zr-Ni-Be -Cu-Ni, etc., but the prepared material is a single-phase amorphous alloy, and its room temperature brittleness is the biggest obstacle restricting its wide engineering application

Method used

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  • A kind of high-entropy amorphous matrix composite material and its preparation method
  • A kind of high-entropy amorphous matrix composite material and its preparation method
  • A kind of high-entropy amorphous matrix composite material and its preparation method

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Embodiment 1

[0022] Embodiment 1: The molecular formula of the high-entropy amorphous matrix composite material in this embodiment is Ti 13 Zr 13 f 13 Nb 13 Cu 13 be 35 ;

[0023] The invention provides an amorphous composite material with equiatomic ratio or near equiatomic ratio, which has excellent characteristics of (yield strength ≥ 1700 MPa) and high plasticity (fracture strain ≥ 10%).

[0024] Its preparation steps:

[0025] (1) The atomic percentage (Ti-Zr-Hf-Nb-Cu) 100-x be x The atomic percentage x of the Be element is set to 35, and the other elements are equal to the atomic ratio of 13, that is, Ti 13 Zr 13 f 13 Nb 13 Cu 13 be 35 . Proportioning raw materials 30g, in which the purity of Ti, Zr, Nb, Cu is ≥99.9%, the purity of Hf is ≥99.0%, and the purity of Be is ≥97.0%.

[0026] (2) Use a high-vacuum non-consumable arc melting furnace to melt raw materials under the protection of high-purity argon (purity ≥ 99.999%). Here two steps are used to complete the smel...

Embodiment 2

[0032] Embodiment 2: The molecular formula of the high-entropy amorphous matrix composite material in this embodiment is Ti 14 Zr 14 f 14 Nb 14 Cu 14 be 30 , the others are the same as in Embodiment 1.

Embodiment 3

[0033] Embodiment 3: The molecular formula of the high-entropy amorphous matrix composite material in this embodiment is Ti 14.5 Zr 14.5 f 14.5 Nb 14.5 Cu 14.5 be 27.5 , the others are the same as in Embodiment 1.

[0034] The present invention adopts high-vacuum non-consumable electric arc smelting furnace to prepare the composition as Ti 13 Zr 13 f 13 Nb 13 Cu 13 be 35 , Ti 14 Zr 14 f 14 Nb 14 Cu 14 be 30 , Ti 14.5 Zr 14.5 f 14.5 Nb 14.5 Cu 14.5 be 27.5 High-entropy amorphous-based composite materials, and by measuring its X-ray diffraction spectrum analysis to determine that the prepared alloy is a high-entropy amorphous-based composite material.

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Abstract

A high-entropy amorphous matrix composite material and preparation method thereof, belonging to the technical field of composite materials, its composition is (Ti-Zr-Hf-Nb-Cu)100-xBex, x is the atomic percentage of Be element, x ≤40%, the atomic percentage of other elements is: Ti is 12%~16.67%; Zr is 12%~16.67%; Hf is 12%~16.67%; Nb is 12%~16.67%; Cu is 12% ~16.67%. Hf and Nb are smelted first to form master alloys, and then the master alloys are put together with Ti, Zr, Cu and Be elements for repeated smelting to obtain high-entropy amorphous matrix composites with excellent mechanical properties such as high strength and high plasticity.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a composite material of a six-component high-entropy amorphous matrix and a preparation method thereof. Background technique [0002] High-entropy alloys are a type of alloy that is alloyed by five or more elements according to the principle of equiatomic ratio or near equiatomic ratio to form a high-entropy solid solution phase. Due to the high mixing entropy between components, they tend to form solid solutions. The obtained alloy has the characteristics of high temperature thermal stability, high strength, high hardness, good wear resistance, excellent oxidation resistance and corrosion resistance, so high entropy alloy has become a new material with great development potential. has great application prospects. Among them, the solid solution alloy with face-centered cubic structure is represented by CoCrCuFeNi discovered by Professor Ye Junwei from Nat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C45/00
CPCC22C45/00C22C1/11
Inventor 王永胜武荣风令狐嵘凯乔珺威
Owner TAIYUAN UNIV OF TECH
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