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Zr-based micro/nano porous alloy and preparation method thereof

A nanoporous and alloy technology, applied in the field of new materials, achieves the effect of simple preparation process, high structural integrity, and controllable shape and size

Active Publication Date: 2021-08-17
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is essentially different from the aforementioned dealloying method in principle

Method used

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  • Zr-based micro/nano porous alloy and preparation method thereof
  • Zr-based micro/nano porous alloy and preparation method thereof
  • Zr-based micro/nano porous alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1 Zr 2 Fe Microporous Alloy

[0022] Step 1: Zr 70 al 15 Fe 15 Preparation of precursor alloys

[0023] Select Zr 70 al 15 Fe 15 As the precursor alloy composition, industrially pure Zr (>99%), Al (>99.9%) and Fe (>99%) metals are used as raw materials, and the composition of Zr by atomic percentage 70 al 15 Fe 15 Conversion, weighing, and alloy preparation; mix the raw materials and place them in a water-cooled copper crucible in a non-consumable arc melting furnace, and then evacuate to 1×10 -2 Pa, filled with 0.05MPa industrial pure Ar atmosphere for smelting, the arc melting working current is 250A; the alloy ingot is turned upside down and smelted repeatedly 4 times to obtain an alloy ingot with uniform composition. Then, using the suction casting method, under the condition of cooling rate of 300K / s, the precursor alloy is prepared, and the backscattered electron image of its structure is shown in the attached figure 1 As shown in (a), it shows ...

Embodiment 2

[0029] Example 2 ZrCo nanoporous alloy

[0030] Step 1: Zr 60 al 15 co 25 Preparation of (TM=Co) precursor alloy

[0031] Select Zr 60 al 15 co 25 As a precursor alloy composition, industrially pure Zr (>99%), Al (>99.9%) and Co (>99%) metals are used as raw materials, and the composition of Zr by atomic percentage 60 al 15 co 25 Conversion, weighing, and alloy preparation; mix the raw materials and place them in a water-cooled copper crucible in a non-consumable arc melting furnace, and then evacuate to 1×10 -2 Pa, filled with 0.05MPa industrial pure Ar atmosphere for smelting, the arc melting working current is 250A; the alloy ingot is turned upside down and smelted repeatedly 4 times to obtain an alloy ingot with uniform composition. Then, using the suction casting method, the precursor alloy is prepared at a cooling rate of about 800K / s, and the backscattered electron image of its structure is shown in the attached figure 2 As shown in (a), it shows a typical na...

Embodiment 3

[0038] Example 3 Zr 2 Ni microporous alloy

[0039] Step 1: Zr 55 al 25 Ni 20 Preparation of (TM=Ni) precursor alloy

[0040] Select Zr 55 al 25 Ni 20 As the precursor alloy composition, industrially pure Zr (>99%), Al (>99.9%) and Ni (>99%) metals are used as raw materials, and the composition of Zr by atomic percentage 55 al 25 Ni 20 Conversion, weighing, and alloy preparation; mix the raw materials and place them in a water-cooled copper crucible in a non-consumable arc melting furnace, and then evacuate to 1×10 -2 Pa, filled with 0.05MPa industrial pure Ar atmosphere for smelting, the arc melting working current is 250A; the alloy ingot is turned upside down and smelted repeatedly 4 times to obtain an alloy ingot with uniform composition. Then, using the suction casting method, the precursor alloy was prepared at a cooling rate of 400K / s. The backscattered electron image of the structure showed a typical nanoscale amplitude modulation structure, and its constitue...

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Abstract

The invention discloses a Zr-based micro / nano porous alloy and a preparation method thereof, and belongs to the technical field of new materials. The chemical composition of the porous alloy is Zr2TM or ZrTM, TM = Fe1-x-yCoxNiy, x is more than or equal to 0 and less than or equal to 1, and y is more than or equal to 0 and less than or equal to 1. In the preparation process, firstly, components are selected in a Zr100-p-qAlpTMq (p is more than or equal to 15 and less than or equal to 25, and q is more than or equal to 15 and less than or equal to 25) region to prepare a precursor alloy; secondly, the electrochemical performance of the precursor alloy is measured through an electrochemical workstation, and the voltage parameter range of the Zr-based porous material prepared through subsequent electrochemistry is determined; and finally, electrochemical treatment is carried out by taking the precursor alloy as a working electrode, so that selective corrosion of an alloy phase of the precursor alloy is smoothly carried out, a Zr2TM phase or a ZrTM phase is left, and the Zr-based porous material with high structural integrity and uniform communication of pores is obtained. The technical bottleneck of preparing the porous material by a dealloying method is broken through, and the Zr-based porous material is successfully obtained; The prepared Zr-based micro-nano porous material is high in structural integrity and controllable in shape and size; and the preparation process flow is simple, efficient and good in reproducibility, and industrial production is easy to realize.

Description

technical field [0001] The invention belongs to the technical field of new materials, and relates to a Zr-based alloy micro-nano porous material with good structural integrity and stable and controllable pore size and a preparation method thereof. Background technique [0002] Porous materials are a class of functional materials with pore characteristics. Among them, metal nanoporous materials have both large specific surface area and excellent thermal conductivity, electrical conductivity and corrosion resistance, and have recently received extensive attention in industrial technology fields such as catalysis and separation. [0003] Zr-based alloys have important application potential in the fields of recovery, storage, and transportation of hydrogen and its isotopes. For example Zr 2 Fe and ZrCo alloy, as a hydrogen absorbing material, has the advantages of fast hydrogen absorbing speed, high absorption efficiency, not easy to pulverize, high safety, and strong operabil...

Claims

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Application Information

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IPC IPC(8): C22C16/00C22C1/08C22C1/02B22D18/06C25F3/08
CPCC22C16/00C22C1/08C22C1/02B22D18/06C25F3/08
Inventor 王英敏羌建兵王惜魏明玉潘伟通
Owner DALIAN UNIV OF TECH
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