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Early transition metal high-entropy alloy for biomedicine application

A technology of transition group metals and high-entropy alloys, applied in the field of high-entropy alloys, can solve the problems of poor wear resistance of stainless steel and titanium alloys, and achieve the effect of good corrosion resistance.

Inactive Publication Date: 2017-12-19
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Stainless steel, titanium alloys and cobalt-chromium-molybdenum alloys commonly used in clinical practice cannot fully meet all performance requirements, such as pitting corrosion of stainless steel, poor wear resistance of titanium alloys, and release of toxic metal ions from cobalt-chromium-molybdenum alloys. application

Method used

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  • Early transition metal high-entropy alloy for biomedicine application
  • Early transition metal high-entropy alloy for biomedicine application
  • Early transition metal high-entropy alloy for biomedicine application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Preparation of Ti by Vacuum Non-consumable Arc Melting 25 Zr 25 Nb 25 Ta 25 Alloy ingot (nominal composition is atomic percentage, the same below)

[0030] Using commercially available pure metal Ti, Zr, Nb, Ta element rods, blocks and other bulk materials (purity higher than 99.5%, mass percentage) as starting materials, arc smelted into quaternary elements in an argon atmosphere purified by titanium Master alloy ingot. The alloy ingot needs to be smelted several times to ensure the uniformity of the composition.

[0031] A block sample of 5mm×5mm×1mm is cut from the alloy ingot and used for X-ray diffraction (XRD) analysis after mechanical grinding. It is a single-phase bcc structure. The diffraction spectrum is as figure 1 . A block sample of 8mm×8mm×2mm was cut from the alloy ingot, and subjected to strict mechanical grinding and polishing after hot mounting. The Vickers hardness was measured on a Vickers microhardness tester at room temperature. The results are shown i...

Embodiment 2

[0033] Preparation of Ti by Non-consumable Vacuum Arc Melting 22.5 Zr 22.5 Nb 22.5 Ta 22.5 Mo 10 Alloy ingot

[0034] Using commercially available pure metal bars and blocks of Ti, Zr, Nb, Ta, Mo, and other bulk materials (purity higher than 99.5%, mass percentage) as starting materials, arc smelted in an argon atmosphere purified by titanium Five yuan master alloy ingot. The alloy ingot needs to be smelted several times to ensure the uniformity of the composition. The crystal structure, hardness, compressibility and electrochemical behavior of the alloy were measured using the same method as in Example 1. The composition alloy has a two-phase bcc structure, and no pitting corrosion occurs in the PBS solution. See the corresponding measurement results figure 1 , 2 , 3 and Tables 1, 2.

Embodiment 3

[0036] Preparation of Ti by Non-consumable Vacuum Arc Melting 21.25 Zr 21.25 Nb 21.25 Ta 21.25 Mo 15 Alloy ingot

[0037] Using commercially available pure metal bars and blocks of Ti, Zr, Nb, Ta, Mo, and other bulk materials (purity higher than 99.5%, mass percentage) as starting materials, arc smelted in an argon atmosphere purified by titanium Five yuan master alloy ingot. The alloy ingot needs to be smelted several times to ensure the uniformity of the composition. The crystal structure, hardness, compressibility and electrochemical behavior of the alloy were measured using the same method as in Example 1. The composition alloy has a two-phase bcc structure, and no pitting corrosion occurs in the PBS solution. See the corresponding measurement results figure 1 , 2 , 3 and Tables 1, 2.

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Abstract

The invention provides a multi-component high-entropy alloy prepared from the components of early transition metal elements such as titanium, zirconium, tantalum and molybdenum. The multi-component high-entropy alloy is characterized in that the alloy comprises the components of the early transition metal elements of Ti, Zr, Nb and Ta, the component chemical formula of the alloy is TiaZrbNbcTad, wherein a, b, c and d show the atom content percentage, a is 20-30, b is 20-30, c is 20-30, d is 20-30, and the sum of a, b, c and d is 100; and the appropriate quantity of elements of Mo, Si, Cu and Ag can be further added in the alloy. The high-entropy alloy has the characteristics of body-centered cubic crystal structure, high strength, high hardness, corrosion resistance, good biocompatibility and the like, and is suitable for being used as a biomedicine application material for hard tissue repairing and replacing.

Description

Technical field [0001] The invention relates to a high-entropy alloy with multi-component chemical composition and characteristics of near equal atomic ratio or equal atomic ratio, and in particular provides a kind of high-entropy alloy of the former transition metal which can be prepared by vacuum non-consumable arc melting technology. Background technique [0002] Traditional solid solution alloys use a certain metal element as the main element matrix in chemical composition, and add appropriate alloy elements according to the performance requirements to form gaps or replace the solid solution phase to obtain optimized comprehensive performance. The physical, chemical, mechanical properties and biocompatibility of alloys mainly depend on the properties of the matrix elements. The alloy composition is at the end of the thermodynamic equilibrium phase diagram, which may be accompanied by the formation of a small amount of intermetallic compound phase. [0003] "High-entropy alloys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C22C1/02
CPCC22C30/00C22C1/02C22C27/02
Inventor 徐坚王少平
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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