CN100429328C

CN100429328C - Centimeter grade plastic Cu-(Zr,Ti)-Al bulk amorphous alloy

Info

Publication number: CN100429328C
Application number: CNB2007100670910A
Authority: CN
Inventors: 蒋建中; 陈连义; 姜清奎; 丁少庆; 张华革; 伍建中
Original assignee: Zhejiang University ZJU
Current assignee: Zhejiang University ZJU
Priority date: 2007-02-09
Filing date: 2007-02-09
Publication date: 2008-10-29
Anticipated expiration: 2027-02-09
Also published as: CN101012535A

Abstract

The invention discloses a non-crystal alloy of centimetre grade plastic Cu-(Zr, Ti)-Al system block, which possesses 50-100% non-crystal phase, wherein the structural formula of system alloy is Cu45Zr48-xAl7Tix (x is atom percentage of Ti element, which is between 0.5 and 6).

Description

Plasticity Cu-(Zr, Ti)-the Al Al-Cu-Zn block amorphous alloy

Technical field

The present invention relates to the amorphous alloy field, particularly relate to Cu-(Zr, Ti)-the Al Al-Cu-Zn block amorphous alloy.

Background technology

Amorphous alloy is that the composed atom arrangement is not periodically and a symmetric class novel alloy material.Because its special microtexture causes them to have superior mechanics, physics, chemistry and magnetic property, as high strength, high rigidity, wear-resistant, corrosion-resistant.These superior performances make amorphous alloy have application potential in a lot of fields.

Simultaneously, amorphous alloy also has the weakness of self, has limited its application.The main difficulty that amorphous alloy faces in using is: 1) prepare large-sized amorphous alloy.Metal and alloy liquid tend to be transformed into the crystalline material that atomic rule is arranged in process of cooling, seek out the amorphous alloy of atom long-range lack of alignment, and it is enough fast that speed of cooling is wanted, make atom also have little time to be arranged in crystalline structure with regard to frozen firmly.Under the identical situation of other conditions, along with the big increase of sample size, speed of cooling slows down, and causes large-sized amorphous alloy to be difficult to obtain.2) raising of thermostability.Amorphous alloy is in the thermodynamics metastable state, the trend that oriented thermodynamics stable state-crystalline state changes, and this transition temperature is called crystallization temperature.Therefore in order in bigger temperature range, to use amorphous material, just need to improve the thermostability of amorphous alloy, the high alloy system of exploitation thermostability.3) enhancing of amorphous alloy plasticity.Amorphous metal does not have the slip mechanism of crystalline state metal, and fracture suddenly takes place when added stress reaches breaking tenacity, causes the generation of disaster accident, has restricted the application of amorphous metal in the structured material field.The plasticity of improving amorphous metal becomes the focus of present amorphous alloy area research.In addition, amorphous metal is used at medicine equipment and technical field of biological material, it is vital that the nothing of component poisons.

Summary of the invention

The objective of the invention is to develop have high glass forming ability, the thermostability height, plasticity is good and do not contain harmful element a kind of Cu-(Zr, Ti)-the Al Al-Cu-Zn block amorphous alloy.

The technical solution adopted for the present invention to solve the technical problems is as follows:

This Al-Cu-Zn block amorphous alloy comprises the amorphous phase of volume fraction 50-100%, and this is that the structural formula of alloy is Cu ₄₅Zr _48-xAl ₇Ti _x, wherein x is a Ti atoms of elements percentage ratio, 0.5≤x≤6.

The material purity of component Cu, Zr, Ti and the Al of described non-crystaline amorphous metal is 96%～99.999%.

The beneficial effect that the present invention has is: provided the alloy with following characteristics: 1) size is big, and the maximum diameter of amorphous alloy rod is 10mm fully; 2) do not contain harmful element; 3) intensity height, hardness height; 3) plasticity is good, and plastix strain reaches 32.5%; 4) thermostability, solidity to corrosion are good.Therefore, this alloy has broad application prospects in fields such as machinery, medicine equipment and biomaterials.

Description of drawings

Fig. 1 be according to the Cu-of embodiment 1 preparation (Zr, Ti)-XRD figure of Al Al-Cu-Zn block amorphous alloy;

Fig. 2 be according to the Cu-of embodiment 1 preparation (Zr, Ti)-the DSC figure of Al Al-Cu-Zn block amorphous alloy.

Fig. 3 be according to the Cu-of embodiment 1 preparation (Zr, Ti)-stress-strain curve of Al Al-Cu-Zn block amorphous alloy.

Embodiment

Step 1: melting Cu in the vacuum melting furnace of argon shield ₄₅Zr _48-xAl ₇Ti _xThe alloy spindle, wherein x is a Ti atoms of elements percentage ratio, 0.5≤x≤6.At least melt back is four times, to guarantee the even of alloy pig subconstiuent.

Step 2: casting is blown in employing or suction casting method is prepared into the bulk amorphous alloys sample with the alloy spindle that step 1 obtains.

Step 3: characterize the gained structures of samples with the x ray diffraction method, obtain thermodynamical coordinate with dsc.With mechanics performance test machine, the mechanical property of specimen.

Embodiment 1:

This embodiment adopts suction casting method to prepare the Cu of diameter 6mm ₄₅Zr ₄₆Al ₇Ti ₂Bulk amorphous alloys (non-crystaline amorphous metal that size reaches millimeter magnitude is called as bulk amorphous alloys).

Step 1: with purity is that 99.95% Cu, purity are that 99.87% Zr, purity are that 99.5% Al and purity are that 99.98 Ti is by Cu ₄₅Zr ₄₆Al ₇Ti ₂Proportioning is arc melting in the argon atmospher of zirconium absorption, obtains the alloy spindle that mixes.

Step 2: melting on the water cooled copper mould of spindle in the smelting furnace of argon shield of step 1 acquisition.

Step 3: utilize pressure difference that step 2 is obtained the water cooled copper mould that alloy liquid injects internal diameter 6mm.Make bulk amorphous alloys.

Step 4: characterize this large block amorphous structure with the x ray diffraction method, Fig. 1 is the x x ray diffration pattern x of this sample.

Step 5: the thermodynamical coordinate that obtains this bulk sample with dsc.The DSC curve is shown in Fig. 2.

Step 6: the mechanical property that adopts testing machine for mechanical properties test gained material.

By Fig. 1 and Fig. 2 as can be known this embodiment obtained the bulk amorphous alloys of diameter 6mm.The performance of the bulk amorphous alloys that this embodiment obtains is as shown in table 1.

Table 1Cu ₄₅Zr _46.5Al ₇Ti _1.5The performance of bulk amorphous alloys.

Composition (at.%)	Glass transformation temperature T _g(K)	Crystallization temperature T _x(K)	Surpass cold liquid zone Δ T _x(K)	Compressed rupture strength σ (MPa)	Plastix strain (%)	Vickers' hardness Hv
Composition (at.%)	Glass transformation temperature T _g(K)	Crystallization temperature T _x(K)	Surpass cold liquid zone Δ T _x(K)	Compressed rupture strength σ (MPa)	Plastix strain (%)	Vickers' hardness Hv	Cu ₄₅Zr ₄₆Al ₇Ti ₂	715	747	30	1820	32.5	530

Embodiment 2:

This embodiment adopts suction casting method to prepare the Cu of diameter 10mm ₄₅Zr _46.5Al ₇Ti _1.5Bulk amorphous alloys (non-crystaline amorphous metal that size reaches millimeter magnitude is called as bulk amorphous alloys).

Step 1: with purity is that 99.95% Cu, purity are that 99.87% Zr, purity are that 99.5% Al and purity are that 99.98 Ti is by Cu ₄₅Zr _46.5Al ₇Ti _1.5Proportioning is arc melting in the argon atmospher of zirconium absorption, obtains the alloy spindle that mixes.

Step 3: utilize pressure difference that step 2 is obtained the water cooled copper mould that alloy liquid injects internal diameter 10mm.Make bulk amorphous alloys.

Step 4: characterize this large block amorphous structure with the x ray diffraction method.

Step 5: the thermodynamical coordinate that obtains this bulk sample with dsc.

Embodiment 3:

This embodiment adopts suction casting method to prepare the Cu of diameter 10mm ₄₅Zr _47.5Al ₇Ti _0.5Bulk amorphous alloys (non-crystaline amorphous metal that size reaches millimeter magnitude is called as bulk amorphous alloys).

Step 1: with purity is that 99.95% Cu, purity are that 99.87% Zr, purity are that 99.5% Al and purity are that 99.98 Ti is by Cu ₄₅Zr _47.5Al ₇Ti _0.5Proportioning is arc melting in the argon atmospher of zirconium absorption, obtains the alloy spindle that mixes.

Step 4: characterize this large block amorphous structure with the x ray diffraction method

Step 5: the thermodynamical coordinate that obtains this bulk sample with dsc.

Embodiment 4:

This embodiment adopts suction casting method to prepare the Cu of diameter 10mm ₄₅Zr ₄₂Al ₇Ti ₆Bulk amorphous alloys (non-crystaline amorphous metal that size reaches millimeter magnitude is called as bulk amorphous alloys).

Step 1: with purity is that 99.95% Cu, purity are that 99.87% Zr, purity are that 99.5% Al and purity are that 99.98 Ti is by Cu ₄₅Zr ₄₂Al ₇Ti ₆Proportioning is arc melting in the argon atmospher of zirconium absorption, obtains the alloy spindle that mixes.

Claims

Maximum diameter be 10mm plasticity Cu-(Zr, Ti)-the Al Al-Cu-Zn block amorphous alloy, it is characterized in that: this Al-Cu-Zn block amorphous alloy comprises the amorphous phase of volume fraction 50-100%, this is that the structural formula of alloy is Cu ₄₅Zr _48-xAl ₇Ti _x, wherein x is a Ti atoms of elements percentage ratio, 0.5≤x≤6.
Plasticity Cu-2. according to claim 1 (Zr, Ti)-the Al Al-Cu-Zn block amorphous alloy, it is characterized in that: the material purity of component Cu, Zr, Ti and the Al of described non-crystaline amorphous metal is 96%～99.999%.