Nickle-based block metal glass and its production

A bulk metal and glass technology, applied in the field of amorphous alloys, can solve the problems of low glass forming ability, complex preparation process, unfavorable practical application, etc., and achieve excellent mechanical properties, high glass transition temperature and crystallization temperature, and inhibit crystallization. powerful effect

Inactive Publication Date: 2007-06-20
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome that although the existing nickel-based metallic glass has many advantages such as higher strength and hardness, better chemical properties, and higher glass transition temperature than other metallic glass systems, it also has glass-forming ability It is still relatively low, the preparation process is relatively complicated, and the plasticity is poor, which is not conducive to practical applications. Therefore, the glass-forming ability of nickel-based metallic glasses is further improved by adding high-melting point alloy elements to provide a strong ability to inhibit crystallization. High Glass-forming ability, large-sized nickel-based bulk metallic glasses with high strength and hardness, good plasticity and high glass transition temperature that can be prepared at low cooling rates

Method used

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  • Nickle-based block metal glass and its production
  • Nickle-based block metal glass and its production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1, prepare Ni 52 co 10 Nb 23 Ta 15 large piece of metallic glass

[0024] The purity of the raw material is 99.9wt% (weight percent) of Ni, Co, Nb, and Ta components in a molar ratio of 52:10:23:15. Mix well in an electric arc furnace with an argon atmosphere adsorbed by titanium And smelting, after cooling to get Ni 52 co 10 Nb 23 Ta 15 Master alloy casting ingot; then use the conventional metal mold casting method to melt the ingot again, and use the suction casting device in the electric arc furnace to suck the master alloy melt into the water-cooled copper mold to obtain the composition of Ni 52 co 10 Nb 23 Ta 15 , a large piece of metallic glass with a diameter of 2 mm.

[0025] From the X-ray diffraction (XRD) shown in Figure 1, it can be proved that Ni 52 co 10 Nb 23 Ta 15 The alloy is a completely amorphous alloy. Figure 3 is Ni 52 co 10 Nb 23 Ta 15 Thermal analysis (DSC and DTA) diagrams of bulk amorphous alloys, as can be seen fr...

Embodiment 2～24

[0027] Embodiments 2-24, preparation of various proportions of nickel-based bulk metallic glass

[0028] Various proportions of nickel-based bulk metallic glasses were prepared according to the method of Example 1, and their compositions and thermal physical parameters are listed in Table 1.

[0029] Table 1. Composition and thermophysical parameters of various proportioning nickel-based bulk metallic glasses of the present invention

[0030] Reality

apply

example

alloy composition

D.

(mm)

T g

(K)

T x

(K)

T m

(K)

ΔT

T rg

R

(K / min)

1

Ni 52 co 10 Nb 23 Ta 15

2

938

981

1495

43

0.627

20

2

Ni 52 co 10 Nb 3 Ta 35

2

961

998

1519

37

0.632

20

3

Ni 52 co 10 Nb 8 Ta 30

2

955

993

1...

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Abstract

A nickel-based block metal glass and its production are disclosed. It takes nickel, infusible metal niobium or / and tantalum as main ingredients and other metal components as alloy components, the composition is Ni62-xCoxNb38-yTay, 2<=x<=15, 0<=y<=38. The alloy contains amorphous-phase above 80 wt% volume. The process is carried out by burdening proportionally, casting ingot and absorb casting. It has excellent glass conversion and crystallizing temperature, thermal stability and mechanical performance.

Description

technical field [0001] The invention belongs to the field of amorphous alloys, and in particular relates to a high-strength and plastic nickel-based bulk metallic glass with nickel and refractory metal niobium or / and tantalum as main components, and an appropriate amount of high-melting-point cobalt element added . Background technique [0002] Typically, during metal alloy cooling, if the cooling rate is high enough, the metal alloy will bypass the crystallization process and solidify at the glass transition temperature to form a metallic glass. Due to the limitation of cooling rate and many other factors, it is difficult for metal alloys to form large-sized bulk glasses, so only amorphous ribbons or powders can be obtained. In recent years, through optimized composition design and improved preparation technology, people have broken through the limitation of high cooling rate, and found a series of metal alloys with high amorphous forming ability. This makes it possible t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/04
Inventor 柳延辉潘明祥赵德乾汪卫华
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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