Double-peak nano-porous amorphous alloy and preparation method thereof

Abstract

The invention provides a double-peak nano-porous amorphous alloy and a preparation method thereof. The amorphous material has a double-peak nano-porous structure. The elementary composition of the amorphous material is Y<alpha>Ti<beta>Co<gamma>Al<eta>, wherein the atomic percentages of the elements are as follows: alpha greater than or equal to 3.31% and less than or equal to 5.58%, beta greater than or equal to 50.35% and less than or equal to 52.67%, gamma greater than or equal to 19.79% and less than or equal to 20.46%, and eta greater than or equal to 23.56% and less than or equal to 24.28%; and alpha plus beta plus gamma plus eta is 100. According to the preparation method, a Y<28>Ti<28>Co<20>Al<24> two-phase amorphous alloy serves as a precursor; a porous amorphous alloy framework isobtained through the free dealloying method; and the double-peak nano-porous amorphous alloy with a multistage porous structure is prepared through secondary dealloying. The defects that the technology is complex, the overall technological cycle is long, equipment is complex, the manufacturing cost of the equipment is high, the yield is low, the porous structure of the product is single, the poresize is big, the porosity is low and the specific surface area is small in the current porous amorphous alloy preparation process are overcome.

Description

Technical field:

[0001] The invention relates to the technical field of nanoporous materials, in particular to a bimodal nanoporous amorphous alloy and a preparation method thereof. Background technique:

[0002] In recent years, nanoporous amorphous alloys, as a new type of porous metal, have attracted people's attention because they combine the dual characteristics of porous metals and amorphous alloys. The atomic structure of crystalline materials has a periodic repeated arrangement in three-dimensional space, while the atomic arrangement of amorphous materials shows the characteristics of short-range order and long-range disorder. This difference in structure makes nanoporous amorphous alloys exhibit special properties different from traditional nanoporous metals. According to reports, the hydrogen storage performance of Zr-Co-Al porous amorphous alloys is several times that of Zr-Co-Al bulk amorphous alloys and porous metals with the same composition, indicating that n...

Examples

Embodiment 1

[0033] The first step is to prepare dual-phase amorphous alloy thin strips

[0034] Select high-purity Y, Ti, Co and Al metals as raw materials, the mass purity of the four elements is 99.99wt%, and then according to the target composition Y 28 Ti 28 co 20 Al 24 Weigh each component element, prepare a total of 6g of raw materials, and the marked components are atomic percentages; place the configured 6g of metal raw materials in a vacuum electric arc furnace, and evacuate until the air pressure is 3.0×10 -3 Pa, filled with argon (volume purity of 99.99%), the pressure of argon is 3 × 10 -2 Start arc melting under the condition of MPa, the melting current is 100A, repeat the melting 3 times, each time for 30s, to ensure the uniformity of the alloy structure, and obtain Y 28 Ti 28 co 20 Al 24 Master alloy ingot; take 3g of master alloy ingot and carry out induction melting under the protection of high-purity argon (volume purity 99.99%), and the vacuum degree in the furna...

Embodiment 2

[0041] The first step is to prepare amorphous alloy thin strips

[0042] Select high-purity Y, Ti, Co and Al metals as raw materials, the mass purity of the four elements is 99.99wt%, and then according to the target composition Y 28 Ti 28 co 20 Al 24 Weigh each component element, prepare a total of 6g of raw materials, and the marked components are atomic percentages; place the configured 6g of metal raw materials in a vacuum electric arc furnace, and evacuate until the air pressure is 3.0×10 -3 Pa, filled with argon (volume purity of 99.99%), the pressure of argon is 3 × 10 -2 Under the condition of MPa, the arc melting was started, the melting current was 70A, and the melting was repeated 4 times, 20s each time, to ensure the uniformity of the alloy structure, and Y was obtained after cooling with the furnace. 28 Ti 28 co 20 Al 24 Master alloy ingot; take 3g of master alloy ingot and carry out induction melting under the protection of high-purity argon (volume purity...

Embodiment 3

[0049] The first step is to prepare amorphous alloy thin strips

[0050] Select high-purity Y, Ti, Co and Al metals as raw materials, the mass purity of the four elements is 99.99wt%, and then according to the target composition Y 28 Ti 28 co 20 Al 24 Weigh each component element, prepare a total of 6g of raw materials, and the marked components are atomic percentages; place the configured 6g of metal raw materials in a vacuum electric arc furnace, and evacuate until the air pressure is 3.0×10 -3 Pa, filled with argon (volume purity of 99.99%), the pressure of argon is 3 × 10 -2 Under the condition of MPa, the arc melting was started, the melting current was 90A, and the melting was repeated twice, each time for 25s, to ensure the uniformity of the alloy structure, and Y was obtained after cooling with the furnace. 28 Ti 28 co 20 Al 24 Master alloy ingot; take 3g of master alloy ingot and carry out induction melting under the protection of high-purity argon (volume puri...

Technical field:

[0001] The invention relates to the technical field of nanoporous materials, in particular to a bimodal nanoporous amorphous alloy and a preparation method thereof. Background technique:

[0002] In recent years, nanoporous amorphous alloys, as a new type of porous metal, have attracted people's attention because they combine the dual characteristics of porous metals and amorphous alloys. The atomic structure of crystalline materials has a periodic repeated arrangement in three-dimensional space, while the atomic arrangement of amorphous materials shows the characteristics of short-range order and long-range disorder. This difference in structure makes nanoporous amorphous alloys exhibit special properties different from traditional nanoporous metals. According to reports, the hydrogen storage performance of Zr-Co-Al porous amorphous alloys is several times that of Zr-Co-Al bulk amorphous alloys and porous metals with the same composition, indicating that n...

Examples

Embodiment 1

[0033] The first step is to prepare dual-phase amorphous alloy thin strips

[0034] Select high-purity Y, Ti, Co and Al metals as raw materials, the mass purity of the four elements is 99.99wt%, and then according to the target composition Y 28 Ti 28 co 20 Al 24 Weigh each component element, prepare a total of 6g of raw materials, and the marked components are atomic percentages; place the configured 6g of metal raw materials in a vacuum electric arc furnace, and evacuate until the air pressure is 3.0×10 -3 Pa, filled with argon (volume purity of 99.99%), the pressure of argon is 3 × 10 -2 Start arc melting under the condition of MPa, the melting current is 100A, repeat the melting 3 times, each time for 30s, to ensure the uniformity of the alloy structure, and obtain Y 28 Ti 28 co 20 Al 24 Master alloy ingot; take 3g of master alloy ingot and carry out induction melting under the protection of high-purity argon (volume purity 99.99%), and the vacuum degree in the furna...

Embodiment 2

[0041] The first step is to prepare amorphous alloy thin strips

[0042] Select high-purity Y, Ti, Co and Al metals as raw materials, the mass purity of the four elements is 99.99wt%, and then according to the target composition Y 28 Ti 28 co 20 Al 24 Weigh each component element, prepare a total of 6g of raw materials, and the marked components are atomic percentages; place the configured 6g of metal raw materials in a vacuum electric arc furnace, and evacuate until the air pressure is 3.0×10 -3 Pa, filled with argon (volume purity of 99.99%), the pressure of argon is 3 × 10 -2 Under the condition of MPa, the arc melting was started, the melting current was 70A, and the melting was repeated 4 times, 20s each time, to ensure the uniformity of the alloy structure, and Y was obtained after cooling with the furnace. 28 Ti 28 co 20 Al 24 Master alloy ingot; take 3g of master alloy ingot and carry out induction melting under the protection of high-purity argon (volume purity...

Embodiment 3

[0049] The first step is to prepare amorphous alloy thin strips

[0050] Select high-purity Y, Ti, Co and Al metals as raw materials, the mass purity of the four elements is 99.99wt%, and then according to the target composition Y 28 Ti 28 co 20 Al 24 Weigh each component element, prepare a total of 6g of raw materials, and the marked components are atomic percentages; place the configured 6g of metal raw materials in a vacuum electric arc furnace, and evacuate until the air pressure is 3.0×10 -3 Pa, filled with argon (volume purity of 99.99%), the pressure of argon is 3 × 10 -2 Under the condition of MPa, the arc melting was started, the melting current was 90A, and the melting was repeated twice, each time for 25s, to ensure the uniformity of the alloy structure, and Y was obtained after cooling with the furnace. 28 Ti 28 co 20 Al 24 Master alloy ingot; take 3g of master alloy ingot and carry out induction melting under the protection of high-purity argon (volume puri...

Images