Amorphous nickel-free zirconium alloy

a nickel-free zirconium alloy and nickel-free technology, applied in the field of amorphous alloys (or metallic glass), to achieve the effects of high fracture toughness, high strength and easy formation

Inactive Publication Date: 2013-02-07
INST OF METAL RES CHINESE ACADEMY OF SCIENECE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010]An object of the present invention is to provide an amorphous zirconium alloy which is readily formed, wherein the zirconium alloy does not contain nickel element and can be made through copper mold casting process to f

Problems solved by technology

This limiting factor is due to the requirement of sufficiently high rate of heat

Method used

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  • Amorphous nickel-free zirconium alloy
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  • Amorphous nickel-free zirconium alloy

Examples

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Effect test

exemplary embodiment 1

b>2.1Cu25Al12 Alloy (Numeric References Refer to Atomic Percentage)

[0043]The starting materials are pure Zr, Ti, Cu, Al in the forms of rod, bulk, ingot, sheet brought in the market (the purity is higher than 99.5% in percentage weight), which are processed under Ti-gettered argon atmosphere in a water-cooled copper hearth by arc melting to form a quaternary master alloy ingot. The master alloy ingot is melted for several times in order to ensure compositional homogeneity. Place 55 g master alloy ingot in a water-cooled copper crucible. Arc melting the ingot to a temperature which is higher than the melting point for forming an alloy melt. After melting, turning the copper crucible to pour the alloy melt to a copper mold for casting. The copper mold has an inner cavity with a preset size of φ10 mm×110 mm (other dimension with different diameter and length or various geometry can also be selected). After cooling, the alloy melt forms an alloy rod with a diameter of 10 mm and a length...

exemplary embodiment 2

b>4.4Cu24Al10 Alloy

[0044]The starting materials are pure Zr, Ti, Cu, Al in the forms of rod, bulk, ingot, sheet brought in the market (the purity is higher than 99.5% in percentage weight), which are processed under Ti-gettered argon atmosphere in a water-cooled copper hearth by arc melting to form a quaternary master alloy ingot. The master alloy ingot is melted for several times in order to ensure compositional homogeneity. Place 40 g master alloy ingot in a water-cooled copper crucible. Arc melting the ingot to a temperature which is higher than the melting point for forming an alloy melt. After melting, turning the copper crucible to pour the alloy melt to a copper mold for casting. The copper mold has an inner cavity with a preset size of φ8 mm×110 mm (other dimension with different diameter and length or various geometry can also be selected). After cooling, the alloy melt forms an alloy rod with a diameter of 8 mm and a length of 70 mm. The cross-section of the alloy rod is p...

exemplary embodiment 3

ub>2.02Hf2.52Cu25Al12 Alloy

[0045]The starting materials are pure Zr, Ti, Cu, Al, Hf in the forms of rod, bulk, ingot, sheet brought in the market (the purity is higher than 99.5% in percentage weight), which are processed under Ti-gettered argon atmosphere in a water-cooled copper hearth by arc melting to form a quinary master alloy ingot. The master alloy ingot is melted for several times in order to ensure compositional homogeneity. Place 55 g master alloy ingot in a water-cooled copper crucible. Arc melting the ingot to a temperature which is higher than the melting point for forming an alloy melt. After melting, turning the copper crucible to pour the alloy melt to a copper mold for casting. The copper mold has an inner cavity with a preset size of φ10 mm×110 mm (other dimension with different diameter and length or various geometry can also be selected). After cooling, the alloy melt forms an alloy rod with a diameter of 10 mm and a length of 70 mm. The cross-section of the all...

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Abstract

An amorphous Nickel-Free Zirconium alloy which is readily formed through copper mold casting, comprising a composition consisting of four elements in which the first element is Zr, the second element is Ti, the third element is Cu and the fourth element is Al, wherein an atomic percent of the first to the fourth elements in the composition are represented by a, b, c and d respectively, wherein a=45˜69%, b=0.25˜8%, c=21˜35%, and d=7.5˜15%, where a sum of a, b, c and d is smaller than or equal to 100%. The composition of the amorphous alloy within the above range is melted in a copper mold to form bulk amorphous materials or parts which have characteristics of high tensile strength, high fracture toughness, low Young's modulus and high corrosion resistance.

Description

BACKGROUND OF THE PRESENT INVENTION[0001]1. Field of Invention[0002]The present invention relates to an amorphous alloy (or metallic glass), and more particularly to an amorphous nickel-free zirconium alloy which is readily formed through copper mold casting.[0003]2. Description of Related Arts[0004]Compared to general polycrystalline structured materials, amorphous alloy (also known as metallic glass) has the major structural features of absence of long-range order and grain-boundary. Accordingly, amorphous alloy is advantageous in providing high strength level, high resistance to corrosion and isotropic feature and has great potentials in a variety of applications in the field of micromechanics, microelectronics, sports apparatus or equipment, sophisticated equipment, security device and medical materials, etc. In comparison, general metals and alloys undergo crystallization when normally cooled from liquid state to form polycrystalline structured materials, while amorphous alloys...

Claims

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Application Information

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IPC IPC(8): C22C45/10
CPCC22C1/002C22C45/10C22C1/03C22C1/02C22C1/11
Inventor HE, QIANGXU, JIAN
Owner INST OF METAL RES CHINESE ACADEMY OF SCIENECE
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