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A method for preparing high-entropy alloy coatings by high-entropy alloy powder and hot-press sintering

A high-entropy alloy and hot-press sintering technology, which is applied in the field of high-entropy alloy powder and hot-press sintering to prepare high-entropy alloy coatings, can solve problems such as high cost, complicated processing technology, and limited application prospects, and achieve improved surface properties, Accelerated contact diffusion, large roughness effect

Active Publication Date: 2017-12-05
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These preparation methods all have the disadvantages of high cost and complicated processing technology, which limit their application prospects.
There is no report on the preparation of coating by hot pressing and sintering method with low cost and relatively simple processing technology, and there is no report on the preparation of the high-entropy alloy powder by mechanical alloying method.

Method used

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  • A method for preparing high-entropy alloy coatings by high-entropy alloy powder and hot-press sintering
  • A method for preparing high-entropy alloy coatings by high-entropy alloy powder and hot-press sintering
  • A method for preparing high-entropy alloy coatings by high-entropy alloy powder and hot-press sintering

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A high-entropy alloy powder, based on the sum of atomic percentages being 100%, its atomic percentages are: Cu 20%, Zr 21%, Al 23%, Ti 18%, Ni 18%.

[0028] The high-entropy alloy powder of this example was prepared by mechanical alloying: according to the above proportions, pure metal element powders with a purity greater than 99.9% were selected, added to a ball mill, and ball milled at 350 r / min for 120 h. The ball material used in the ball milling process was The ratio is 15:1, and the high-entropy alloy powder with a particle size of 35 μm is obtained.

[0029] The particle shape of the high-entropy alloy powder in this embodiment is spherical or approximately spherical, and the thermal stability of the alloy powder is good.

Embodiment 2

[0031] A high-entropy alloy powder, based on the sum of atomic percentages being 100%, its atomic percentages are: Cu18%, Zr18%, Al18%, Ti23%, Ni23%.

[0032] The high-entropy alloy powder of this example was prepared by mechanical alloying: according to the above ratio, pure metal element powders with a purity greater than 99.9% were selected, added to a ball mill, and ball milled at 250 r / min for 100 h. The ball material used in the ball milling process was The ratio is 20:1, and the high-entropy alloy powder with a particle size of 40 μm is obtained.

[0033] The high-entropy alloy powder of this embodiment has a spherical or nearly spherical particle shape, and the thermal stability of the alloy powder is good.

Embodiment 3

[0035] A high-entropy alloy powder, based on the sum of atomic percentages being 100%, its atomic percentages are: Cu23%, Zr23%, Al18%, Ti18%, Ni18%.

[0036] The high-entropy alloy powder of this example was prepared by mechanical alloying: according to the above ratio, pure metal element powders with a purity greater than 99.9% were selected, added to a ball mill, and ball milled at 400 r / min for 110 h. The ball material used in the ball milling process was The ratio is 18:1, and the high-entropy alloy powder with a particle size of 38 μm is obtained.

[0037] The particle shape of the high-entropy alloy powder in this embodiment is spherical or approximately spherical, and the thermal stability of the alloy powder is good.

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Abstract

The invention discloses a high-entropy alloy powder and a method for preparing a high-entropy alloy coating by hot pressing. 23 %, Al 18-23 %, Ti 18-23 %, Ni 18-23 %, prepared by mechanical alloying method, and used as coating original powder, sintered on T8 steel matrix by hot pressing sintering process surface to form the high-entropy alloy coating. The high-entropy alloy coating prepared by the hot pressing sintering process is dense, has no pores, no cracks, high microhardness, good seawater corrosion resistance, simple processing technology, low production cost and good application prospect.

Description

technical field [0001] The invention belongs to the field of coating preparation in material technology, and in particular relates to a method for preparing a high-entropy alloy coating by hot-pressing and sintering high-entropy alloy powder. Background technique [0002] The traditional alloy is based on iron, copper, magnesium, aluminum, titanium metal elements, one of them is used as the matrix, and a small amount of one or several metal or non-metal elements are added on this basis to obtain certain Alloy materials with special properties. So far, there are nearly a hundred kinds of alloy systems that have been actually developed and applied. [0003] In the middle of 2004, researchers jumped out of the traditional alloy development framework and proposed a new alloy design concept, that is, multi-principal high-entropy alloys. It is a variety of elements as the main element, five or more main elements, and the atomic percentage of each main element is between 5 and 35...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F9/04C23C24/10
CPCC23C24/106B22F9/04B22F2009/041B22F1/065
Inventor 王艳葛文娟左敏商彩云
Owner UNIV OF JINAN