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Er-containing Al-based bulk metallic glass alloy with large supercooling liquid phase region

A supercooled liquid phase, metallic glass technology, applied in the field of new materials, to achieve the effects of good mechanical properties, low glass turning temperature, and large glass forming ability

Active Publication Date: 2014-12-03
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the deficiency in the development of Al-based metallic glass at present, and provides an Al-based bulk metallic glass alloy containing Er

Method used

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  • Er-containing Al-based bulk metallic glass alloy with large supercooling liquid phase region
  • Er-containing Al-based bulk metallic glass alloy with large supercooling liquid phase region
  • Er-containing Al-based bulk metallic glass alloy with large supercooling liquid phase region

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] al 85 Ni 6.8 co 2.2 Er 4 La 2 Preparation, structure and performance testing of bulk metallic glass alloys:

[0019] Step 1: Al, Ni, Co, Er and La raw materials with a purity greater than 95wt.% are used for compounding according to the composition expression.

[0020] Step 2: Preparation of master alloy ingot: Put the raw materials with a good ratio into the copper crucible of the non-consumable electric arc furnace, and evacuate to 2×10 -3 Pa, filled with argon gas, then arc smelted and the alloy was smelted repeatedly 4 times to obtain a master alloy ingot with uniform composition.

[0021] Step 3: Preparation of metallic glass powder: Put the master alloy ingot into the powder making equipment and vacuumize to 2×10 -3 Pa, fill with argon gas, and heat the master alloy to a molten state by high-frequency induction melting. Turn on the spray switch, let the molten metal liquid pass through the high-pressure argon gas, use the high-pressure gas to spray the allo...

Embodiment 2

[0029] al 85 Ni 6.8 co 2.2 Er 3 La 3 Preparation, structure and performance testing of bulk metallic glass alloys:

[0030] (1) Al, Ni, Co, Er and La raw materials with a purity greater than 95wt.% are used for batching according to the composition expression;

[0031] (2) The implementation steps of master alloy ingot preparation, metallic glass powder and rod preparation, and alloy performance testing are the same as in Example 1, and the detailed data are listed in the attached table.

Embodiment 3

[0033] al 86 Ni 6 co 2 Er 4 La 2 Preparation, structure and performance testing of bulk metallic glass alloys:

[0034] (1) Al, Ni, Co, Er and La raw materials with a purity greater than 95wt.% are used for batching according to the composition expression;

[0035] (2) The implementation steps of master alloy ingot preparation, metallic glass powder and rod preparation, and alloy performance testing are the same as in Example 1, and the detailed data are listed in the attached table.

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Abstract

The invention discloses Er-containing Al-based bulk metallic glass alloy with a large supercooling liquid phase region, belonging to the technical field of novel materials. A specific component expression formula of the alloy is AlaNibCocFedAgeErfLag, wherein a, b, c, d, e, f and g represent atomic percents of corresponding elements, b is not less than 2 and not more than 9, c is not less than 0 and not more than 3, d is not less than 0 and not more than 6, e is not less than 0 and not more than 3, f is not less than 2 and not more than 7, g is not less than 0 and not more than 4, the sum of a, b, c, d, e, f and g is 100, the sum of b, c and d is not less than 6 and not more than 10, and the sum of f and g is not less than 5 and not more than 9. The alloy has good glass forming capability, and a bulk metallic glass alloy bar material with the critical diameter of 1.2mm can be prepared by adopting a copper mould casting method; meanwhile, the alloy has the supercooling liquid phase region and good mechanical property, the temperature of supercooling liquid is 26-40 DEG C, the break strength is 1.11-1.24GPa, the specific strength is 319-348kN.m / kg, the plastic strain is 0.1%-0.4%, and the Vickers hardness is 362-385.

Description

Technical field: [0001] The invention belongs to the technical field of new materials, and relates to an Er-containing Al-based bulk metallic glass alloy with a large supercooled liquid phase interval. technical background: [0002] Metallic glass (amorphous alloy) refers to a metal alloy in which the atomic arrangement has short-range order and long-range disorder in the solid state. Due to the unique microstructure of metallic glass, it has excellent mechanical properties, physical and chemical properties, such as high strength, high hardness, good corrosion resistance, and viscous flow characteristics in the supercooled liquid phase region. New structural or functional materials. [0003] Among the many metallic glass alloy systems that have been discovered, Al-based metallic glass exhibits the characteristics of high specific strength, high toughness and good corrosion resistance. potential application. At present, people have multiple alloy systems (such as: Al-Ni-Co...

Claims

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Application Information

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IPC IPC(8): C22C45/08
Inventor 张伟朱正旺李艳辉
Owner DALIAN UNIV OF TECH
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