Amorphous alloy and color changing method and application thereof

Abstract

The invention provides an amorphous alloy as well as a color changing method and application thereof, and the color changing method comprises the step of performing color changing treatment on the surface of an initial amorphous alloy by adopting pulse current to obtain the amorphous alloy with a color layer on the surface. A color layer is arranged on the surface of the amorphous alloy, and the color of the color layer is different from the main body color of the amorphous alloy; the color of the color layer is located in a visible light area. The required surface color can be strictly controlled by controlling the pulse frequency, the treatment method is simple, convenient, green and energy-saving, the required equipment cost is low, and the method is suitable for color changing treatment so as to be applied to the field of amorphous color changing.

Description

Technical Field

[0001] The present invention relates to the technical field of amorphous alloys, and in particular, to an amorphous alloy, a color-changing method thereof, and an application thereof. Background Art

[0002] Amorphous alloys are a class of metastable alloy materials obtained by rapid cooling technology. They have attracted much attention due to their excellent physical and chemical properties such as high strength, high hardness, excellent corrosion resistance, and wear resistance. They are now widely used in fields such as sports equipment, electronic products, coating materials, and acoustic materials. In practical applications of amorphous alloys, in addition to the mechanical properties required for service, the added value of products brought by the material appearance design also needs to be considered to meet the different aesthetic needs of consumers. And material coloring is the simplest art element and the basis of many complex art designs.

[0003] At present, the surface color-changing treatment of amorphous alloys has broad application prospects. However, existing methods such as nitrogen doping, laser lithography nanostructures, and electroplating oxidation are limited by factors such as cost and efficiency, and it is difficult to meet the needs of large-scale batch production of colored amorphous alloys. There is an urgent need for a surface color-changing treatment method for amorphous alloys with a full range of colors, low cost, and high efficiency. Summary of the Invention

[0004] In view of the problems existing in the prior art, the present invention provides an amorphous alloy, a color-changing method thereof, and an application thereof. The method applies a pulsed current to an iron-based amorphous alloy strip through a pulsed power supply, so that different colors are generated on the surface of the amorphous alloy sample while not changing the main properties of the amorphous alloy, so as to achieve the purpose of changing the color of the amorphous alloy surface while ensuring the soft magnetic and mechanical properties of the original amorphous alloy.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] In a first aspect, the present invention provides a color-changing method for an amorphous alloy, and the color-changing method includes:

[0007] Performing color-changing treatment on the surface of an initial amorphous alloy by using a pulsed current to obtain an amorphous alloy having a color layer on the surface.

[0008] The present invention processes the surface of the initial amorphous alloy by using a pulsed current, so that only a thin layer of material on the surface undergoes a micro reaction to generate different color changes and form a color layer. However, due to the pulsed process in the processing of the pulsed current, the single processing time is short, and the pulsed energy has almost no influence on the main body of the initial amorphous alloy. Therefore, it will not affect other related properties of the initial amorphous alloy. Moreover, this method can produce products with relatively complete colors, can be mass-produced on a large scale, has high efficiency and low cost, and has broad application prospects.

[0009] Preferably, the peak current density of the pulsed current is 6.0×10 7 ~9.5×10 7 A / m 2 , for example, it can be 6.0×10 7 A / m 2 , 6.5×10 7 A / m 2 , 7.0×10 7 A / m 2 , 7.5×10 7 A / m 2 , 8.0×10 7 A / m 2 , 8.5×10 7 A / m 2 , 9.0×10 7 A / m 2 or 9.5×10 7 A / m 2 etc., but not limited to the listed values, and other unlisted values within this range are equally applicable.

[0010] It should be noted that the surface discoloration of the amorphous alloy is also related to the size of the amorphous alloy itself. When its width increases, the surface area of the amorphous alloy that needs to change color increases, resulting in an increase in the required energy. Therefore, controlling the peak current density of the pulsed current can better achieve the surface discoloration effect and prevent the pulsed duration from being too long and affecting the main properties of the amorphous alloy.

[0011] Preferably, the pulse period of the pulsed current is 200 - 400 ms, for example, it can be 200 ms, 220 ms, 240 ms, 260 ms, 280 ms, 300 ms, 320 ms, 340 ms, 360 ms, 380 ms or 400 ms, etc., but not limited to the listed values, and other unlisted values within this range are equally applicable.

[0012] Preferably, the pulse width of the pulsed current is 100 - 200 ms, for example, it can be 100 ms, 110 ms, 120 ms, 130 ms, 140 ms, 150 ms, 160 ms, 170 ms, 180 ms, 190 ms or 200 ms, etc., but not limited to the listed values, and other unlisted values within this range are equally applicable.

[0013] Preferably, the number of pulses of the pulsed current is 10 to 100,000 times. For example, it can be 10 times, 11,120 times, 22,230 times, 33,340 times, 44,450 times, 55,560 times, 66,670 times, 77,780 times, 88,890 times, or 100,000 times, etc., but not limited to the listed values. Other unlisted values within this range are equally applicable, and preferably it is 25 to 2,000 times.

[0014] Preferably, when the visible light wavelength range of the color of the color layer in the visible light region is 570 - 595 nm, the number of pulses of the pulsed current is 25 - 200 times.

[0015] Preferably, when the visible light wavelength range of the color of the color layer in the visible light region is 430 - 480 and 600 - 720 nm, the number of pulses of the pulsed current is 300 - 500 times.

[0016] Preferably, when the visible light wavelength range of the color of the color layer in the visible light region is only 430 - 480 nm, the number of pulses of the pulsed current is 500 - 900 times.

[0017] Preferably, when the visible light wavelength range of the color of the color layer in the visible light region is only 380 - 780 nm, the number of pulses of the pulsed current is 1,000 - 2,000 times.

[0018] The fundamental reason for the change in the color of the color layer lies in the different contents of oxides formed by different valence states of iron ion elements in the surface oxide layer. Initially, Fe 2 O 3 formed by trivalent iron elements covers the surface of the amorphous alloy, forming a light yellow color (originally Fe 2 O 3 is reddish - brown, and shows as light yellow due to the small total amount); as the number of oxides increases, the light yellow gradually turns into golden yellow; as the number of pulses increases, Fe 3+ gradually turns into Fe 2+ , and Fe 3 O 4 is generated, and the mixture of the two produces a purple color; as the oxides gradually increase, the purple turns into dark blue - black; when Fe 2 O 3 almost completely turns into Fe 3 O 4 , the surface of the sample shows a blue color; when the number of pulses continues to increase, the surface Fe 3 O 4 decomposes, the blue color turns into light blue, and finally turns into white.

[0019] Preferably, the color - changing treatment is carried out in an oxygen - containing atmosphere.

[0020] Preferably, the discoloration treatment is carried out in an air atmosphere.

[0021] Preferably, the temperature of the discoloration treatment is -10 to 40 °C. For example, it can be -10 °C, -5 °C, 0 °C, 1 °C, 2 °C, 5 °C, 10 °C, 15 °C, 20 °C, 25 °C, 30 °C, 35 °C or 40 °C, etc., but is not limited to the listed values, and other unlisted values within this range are equally applicable.

[0022] As a preferred technical solution of the present invention, the discoloration method includes:

[0023] Performing discoloration treatment on the surface of an initial amorphous alloy with a thickness ≥ 20 μm and a width ≥ 0.8 mm in an oxygen-containing atmosphere by using a pulsed current, the pulsed peak current density of the pulsed current is 6.0×10 7 ~9.5×10 7 A / m 2 , the pulse period is 200 - 400 ms, the pulse width is 100 - 200 ms, and the number of pulses is 10 - 100000 times, to obtain an amorphous alloy with a color layer on the surface, and the color of the color layer is in the visible light wavelength range of 400 - 800 nm in the visible light region.

[0024] In a second aspect, the present invention provides an amorphous alloy, which is prepared by using the discoloration method of the amorphous alloy described in the first aspect.

[0025] The discoloration method of the amorphous alloy of the present invention has the advantage of being able to control the color spectrum by controlling the parameters of the pulsed current and the number of pulses, and has a low preparation cost, and does not affect the performance of the amorphous alloy itself.

[0026] Preferably, the component of the amorphous alloy is an alloy composition of Fe a Co b Si c B x P y Cu z , where 81 ≤ a ≤ 86 at%, 0 ≤ b ≤ 4 at%, 0 ≤ c ≤ 8 at%, 4 ≤ x ≤ 10 at%, 1 ≤ y ≤ 4 at%, 0.3 ≤ z ≤ 1.3 at%.

[0027] The component of the amorphous alloy in the present invention is Fe a Co b Si c B x P y Cu zAn alloy composition, where 81 ≤ a ≤ 86 at%, for example, it can be 81 at%, 81.5 at%, 82 at%, 82.5 at%, 83 at%, 83.5 at%, 84 at%, 84.5 at%, 85 at%, 85.5 at% or 86 at% etc., but not limited to the listed values, and other unlisted values within this range are equally applicable; 0 ≤ b ≤ 4 at%, for example, it can be 0, 0.5 at%, 1 at%, 1.5 at%, 2 at%, 2.5 at%, 3 at%, 3.5 at% or 4 at% etc., but not limited to the listed values, and other unlisted values within this range are equally applicable; 0 ≤ c ≤ 8 at%, for example, it can be 0, 1 at%, 2 at%, 3 at%, 4 at%, 5 at%, 6 at%, 7 at% or 8 at% etc., but not limited to the listed values, and other unlisted values within this range are equally applicable; 4 ≤ x ≤ 10 at%, for example, it can be 4 at%, 4.5 at%, 5 at%, 5.5 at%, 6 at%, 6.5 at%, 7 at%, 7.5 at%, 8 at%, 8.5 at%, 9 at%, 9.5 at% or 10 at% etc., but not limited to the listed values, and other unlisted values within this range are equally applicable; 1 ≤ y ≤ 4 at%, for example, it can be 1 at%, 1.5 at%, 2 at%, 2.5 at%, 3 at%, 3.5 at% or 4 at% etc., but not limited to the listed values, and other unlisted values within this range are equally applicable; 0.3 ≤ z ≤ 1.3 at%, for example, it can be 0.3 at%, 0.4 at%, 0.5 at%, 0.6 at%, 0.7 at%, 0.8 at%, 0.9 at%, 1.0 at%, 1.1 at%, 1.2 at% or 1.3 at% etc., but not limited to the listed values, and other unlisted values within this range are equally applicable.

[0028] Preferably, the amorphous alloy with the above composition is used for pulsed current treatment to prepare a product with a color layer on the surface. This is because this amorphous alloy has the characteristics of being easy to oxidize and having a variety of colors of the oxide layer; moreover, it has excellent mechanical properties, corrosion resistance and wear resistance, and can generate oxide films of various colors during the pulsed current treatment process. Compared with Zr-based amorphous alloys, it is easier to oxidize and change color; compared with La-based amorphous alloys, it has better thermal stability and is suitable for pulsed current surface oxidation treatment; compared with other types of metal alloys, it has the advantages of more excellent mechanical properties and wear resistance, and this amorphous alloy can better combine with the pulsed current treatment process.

[0029] Preferably, the surface of the amorphous alloy has a color layer, and the color of the color layer is different from the main color of the amorphous alloy; the color of the color layer is in the visible light region.

[0030] Preferably, the thickness of the amorphous alloy is ≥ 20 μm, for example, it can be 21 μm, 22 μm, 23 μm, 24 μm, 25 μm, 28 μm, 30 μm, etc., but not limited to the listed values, and other unlisted values within this range are equally applicable.

[0031] Preferably, the width of the amorphous alloy is ≥ 0.8 mm, for example, it can be 0.8 mm, 0.85 mm, 0.9 mm, 0.95 mm, 1.0 mm, 1.1 mm, 1.2 mm, 1.5 mm, etc., but not limited to the listed values, and other unlisted values within this range are equally applicable.

[0032] Preferably, the length of the amorphous alloy is 50 mm.

[0033] Preferably, the color of the color layer is in the visible light wavelength range of 400 - 800 nm in the visible light region, for example, it can be 400 nm, 450 nm, 500 nm, 550 nm, 600 nm, 650 nm, 700 nm, 750 nm, 800 nm, etc., but not limited to the listed values, and other unlisted values within this range are equally applicable.

[0034] Preferably, the color of the color layer includes any one or a combination of at least two of yellow, gold, purple, blue - black, blue, or white.

[0035] Preferably, the XRD spectrum of the amorphous alloy does not contain oxide peaks.

[0036] Preferably, the DSC curve of the amorphous alloy does not contain oxide peaks.

[0037] Preferably, the soft magnetic properties of the amorphous alloy are comparable to those of the initial amorphous alloy.

[0038] In the third aspect, the present invention provides an application of the amorphous alloy according to the first aspect in sports equipment, electronic products, coating materials, or acoustic materials.

[0039] Due to the full surface color of the amorphous alloy provided in the first aspect of the present invention and still being able to maintain the excellent properties of the original amorphous alloy, it can be widely used in sports equipment, electronic products, coating materials, or acoustic materials. For example, when it is applied to watch materials or computer equipment, it not only has excellent performance but also provides an aesthetic visual effect.

[0040] Compared with the prior art, the present invention has at least the following beneficial effects:

[0041] (1) The color-changing method of the amorphous alloy provided by the present invention is carried out by means of pulsed current. Regardless of the number of pulses, the time of a single pulse is short, and it is difficult to affect the main properties of the initial amorphous alloy. During the process of multiple pulses, with the continuous injection of energy, multiple micro-reactions occur on the surface of the amorphous alloy, resulting in a gradual change in color, solving the problems that existing colored amorphous alloys are difficult to be mass-produced and have a single color.

[0042] (2) Compared with the initial amorphous alloy, the sample XRD and DSC curves of the amorphous alloy provided by the present invention cannot detect the presence of oxide peaks, indicating that the color-changing method used in the present invention has almost no effect on the main components and properties of the initial amorphous alloy itself. Description of the Drawings

[0043] Figure 1 It is a strip chart of the initial amorphous alloy and the amorphous alloys prepared in Example 1 and Examples 5-9.

[0044] Figure 2 It is an XRD chart of the initial amorphous alloy and the amorphous alloys after pulsed current treatment in Examples 1-6.

[0045] Figure 3 It is a DSC chart of the initial amorphous alloy and the amorphous alloys after pulsed current treatment in Examples 1-5.

[0046] Figure 4 It is a visible light reflection spectrum chart of the amorphous alloys in Example 1, Example 5, Example 7 and Example 9. Detailed Embodiments

[0047] The technical solution of the present invention will be further described below in conjunction with the drawings and through specific embodiments.

[0048] The present invention will be further described in detail below. However, the following examples are only simple examples of the present invention and do not represent or limit the scope of the patent protection of the present invention. The scope of protection of the present invention is subject to the claims.

[0049] For the convenience of experiments, the model of the pulsed current generating device used in the specific embodiments of the present invention is Keysight B2901A precision power supply. It should be noted that the pulsed current generating device used in the present invention includes but is not limited to this model, and other devices that can generate pulsed current well-known to those skilled in the art can also be used.

[0050] Example 1

[0051] This example provides a color-changing method for an amorphous alloy. The color-changing method includes the following steps:

[0052] The surface of an initial amorphous alloy (Fe 81.3 Co 4 B 8 Si 2 P 4 Cu 0.7 ) with a thickness of 20 μm, a width of 1 mm, and a length of 50 mm is subjected to color-changing treatment in an air atmosphere using a pulsed current. The pulsed peak current density of the pulsed current is 6.0×10 7 A / m 2 , the pulse period is 250 ms, the pulse width is 100 ms, and the number of pulses is 50 times, obtaining an amorphous alloy with a color layer on its surface.

[0053] Examples 2 to 9

[0054] Examples 2 to 9 provide a method for color-changing an amorphous alloy. Except that the number of pulses is 75 times, 100 times, 200 times, 300 times, 400 times, 500 times, 700 times, and 1500 times respectively, the rest are the same as in Example 1 and will not be elaborated here.

[0055] Among them, the strip diagrams of the amorphous alloys prepared in Example 1 and Examples 5 to 9 are respectively as shown in Figure 1 b to g, Figure 1 where a is the strip diagram of the initial amorphous alloy.

[0056] The XRD patterns of the initial amorphous alloy and the amorphous alloys after pulsed current treatment in Examples 1 to 6 are as shown in Figure 2 . It can be clearly seen that no obvious oxide peaks appear in the XRD patterns, indicating that the oxide film layer generated by the treatment method proposed in the present invention is relatively thin and cannot be detected by XRD, and will not have an obvious impact on the amorphous alloy sample.

[0057] The DSC diagrams of the initial amorphous alloy and the amorphous alloys after pulsed current treatment in Examples 1 to 5 are as shown in Figure 3 . It can be seen from the figure that there are only a crystallization peak at nearly 400 °C and a FeB phase precipitation peak at 550 °C in the DSC curve, and no exothermic or endothermic peaks belonging to oxides appear, indicating that the oxide film layer generated by the treatment method proposed in the present invention is relatively thin and will not have an obvious impact on the amorphous alloy sample.

[0058] Figure 4 are the visible light reflection spectra of the amorphous alloy samples in Examples 1, 5, 7, and 9 after pulsed current surface color-changing treatment. It can be seen from the figure that the colors on their surfaces have changed differently.

[0059] Example 10

[0060] This embodiment provides a method for changing the color of an amorphous alloy. Except that the pulse period is 600 ms and the pulse width is 300 ms, the rest are the same as those in Embodiment 1 and will not be elaborated here.

[0061] In this embodiment, the single - pulse period and width are too long, and the single - input energy is too large, resulting in the burning of the sample.

[0062] Embodiment 11

[0063] This embodiment provides a method for changing the color of an amorphous alloy. Except that the pulse period is 100 ms and the pulse width is 50 ms, the rest are the same as those in Embodiment 1 and will not be elaborated here.

[0064] In this embodiment, due to the too - short single - pulse period and too - small single - input energy, there is no change on the surface of the sample.

[0065] Embodiment 12

[0066] This embodiment provides a method for changing the color of an amorphous alloy. Except that the pulse width is 220 ms, the rest are the same as those in Embodiment 1 and will not be elaborated here.

[0067] In this embodiment, since the pulse width occupies a relatively wide proportion of the pulse period and the heat dissipation is slow, the sample is burned.

[0068] Embodiment 13

[0069] This embodiment provides a method for changing the color of an amorphous alloy. Except that the pulse width is 80 ms, the rest are the same as those in Embodiment 1 and will not be elaborated here.

[0070] In this embodiment, since the pulse width occupies a relatively short proportion of the pulse period and all the heat is dissipated, there is no change on the surface of the sample.

[0071] Embodiment 14

[0072] This embodiment provides a method for changing the color of an amorphous alloy. Except that the pulse - peak current density of the pulse current is 1.2×10 8 A / m 2 , the rest are the same as those in Embodiment 1 and will not be elaborated here.

[0073] In this embodiment, due to the too - large input energy, the sample is burned.

[0074] Embodiment 15

[0075] This embodiment provides a method for changing the color of an amorphous alloy. Except that the pulse - peak current density of the pulse current is 5.0×10 7 A / m 2 , the rest are the same as those in Embodiment 1 and will not be elaborated here.

[0076] In this embodiment, since the input energy is too small, there is no change on the surface of the sample.

[0077] Example 16

[0078] This embodiment provides a method for changing the color of an amorphous alloy. Except for the composition of Fe 75 Co 4 Si 8 B 8 P 4 Cu 1 the rest is the same as that in Example 1 and will not be elaborated here.

[0079] In Example 16, when the iron element content is low, the sample is less likely to be oxidized compared to Example 1, the surface shows a very light yellow color, and the number of pulses required for each oxide film color increases.

[0080] Example 17

[0081] This embodiment provides a method for changing the color of an amorphous alloy. Except for the composition of Fe 95 Si 1 B 1 P 2 Cu 1 the rest is the same as that in Example 1 and will not be elaborated here.

[0082] In Example 17, when the iron element content is high, the sample is more likely to be oxidized compared to Example 1, the surface shows a golden yellow color, and the number of pulses required for each oxide film color decreases.

[0083] Example 18

[0084] This embodiment provides a method for changing the color of an amorphous alloy, which includes the following steps:

[0085] Use pulsed current to perform color-changing treatment on the surface of an initial amorphous alloy (Fe 82 Co 4 B 8 Si 2 P 3 Cu 1 ) with a thickness of 25 μm, a width of 2 mm, and a length of 40 mm in an air atmosphere. The pulsed peak current density of the pulsed current is 6.0×10 7 A / m 2 , the pulse period is 240 ms, the pulse width is 100 ms, and the number of pulses is 100 times to obtain an amorphous alloy with a color layer on the surface.

[0086] Example 19

[0087] This embodiment provides a method for changing the color of an amorphous alloy, and the method comprises the following steps:

[0088] The initial amorphous alloy (Fe) with a thickness of 20 μm, a width of 1 mm and a length of 50 mm was subjected to a pulse current in an air atmosphere. 86 Co 1 B 5 Si 3 P 4 Cu 1 ) is subjected to color change treatment on the surface, and the peak current density of the pulse current is 7.0×10 7 A / m 2 , the pulse period is 280ms, the pulse width is 120ms, the pulse number is 500 times, and an amorphous alloy with a color layer on the surface is obtained.

[0089] Comparative Example 1

[0090] This comparative example provides a method for changing the color of an amorphous alloy, and the method comprises the following steps:

[0091] In air atmosphere, an initial amorphous alloy (Fe 81.3 Co 4 B 8 Si 2 P 4 Cu 0.7 ) is heat treated to change color, the heat treatment temperature is 150° C., and the time is 3 hours to obtain an amorphous alloy with a color layer on the surface.

[0092] Since the comparative example adopts heat treatment for surface color change, the surface of the sample is dark blue-black, and the oxidation is relatively serious. Moreover, the amorphous alloy obtained in comparative example 1 is brittle and has reduced mechanical properties compared with the amorphous alloy product in example 1. The surface color change method used in this comparative example takes a very long time, which is hundreds of times that in example 1. Furthermore, the surface color change method used in this comparative example is difficult to accurately control the surface color of the sample compared with example 1.

[0093] Comparative Example 2

[0094] This comparative example provides a method for changing the color of an amorphous alloy, and the method comprises the following steps:

[0095] In air atmosphere, an initial amorphous alloy (Fe 81.3 Co 4 B 8 Si 2 P 4 Cu 0.7) The surface is treated with picosecond laser, the scanning speed is 150 m / s, the laser power factor is 50%, the repetition frequency is 200 kHz, the pulse width is 7 ps, and the line spacing is 0.005 mm, obtaining an amorphous alloy with a color layer on the surface.

[0096] In this comparative example, picosecond laser is used for surface treatment, resulting in surface etching and affecting the performance of the amorphous alloy.

[0097] A HATACHI UH4150 spectrometer from Hitachi, Japan is used to test the reflectivity of the annealed sample in the visible light range. Ten processed strip samples are pasted side by side on the sample stage, and the reflectivity test is carried out after ensuring that all the light holes are covered.

[0098] An XRD diffractometer is used to test the XRD pattern of the amorphous alloy.

[0099] An X-ray diffractometer (XRD) (Empyrean) produced by Bruker, a German company, is used to determine the phase structure in the amorphous alloy samples before and after annealing. The analysis uses CuKα target radiation, and the diffraction angle 2θ is between 20° and 90°. During the experiment, two amorphous alloy strips are cut into 30-mm-long samples and pasted side by side on a zero-background reflector, and then placed in the experimental equipment for testing.

[0100] A DSC detector is used to test the DSC diagram of the amorphous alloy.

[0101] A DSC 404F3 series high-temperature differential scanning calorimeter from Netzsch, Germany is used for testing. In the experiment, the amorphous strip samples are cut into pieces and about 10 mg is weighed and placed in an alumina crucible. An empty alumina crucible is used for reference. The heating rate is set at 20 °C / min, and argon is used as the protective gas throughout the process to prevent sample oxidation. To make the experimental results more accurate, each experiment is measured twice, and the actual DSC curve is obtained by subtracting the two curves.

[0102] The test results of the above examples and comparative examples are shown in Table 2.

[0103] Table 2

[0104]

[0105]

[0106] As can be seen from Table 1, the method used in the examples can cause a gradual change in the color of the sample surface, and the required surface color should be precisely controlled by controlling the number of pulses. No oxide peaks appear in the XRD and DSC of the processed sample, indicating that the surface oxide film generated by the method provided by the present invention is relatively thin and will not have a great impact on the performance of the sample itself. It is a processing method suitable for color change on the amorphous surface.

[0107] The present invention uses the above embodiments to illustrate the detailed structural features of the present invention. However, the present invention is not limited to the above detailed structural features, that is, it does not mean that the present invention must rely on the above detailed structural features to be implemented. Those skilled in the art should understand that any improvement to the present invention, the equivalent replacement of the components selected by the present invention, the addition of auxiliary components, and the selection of specific methods, etc., all fall within the protection scope and the disclosure scope of the present invention.

Claims

1. A method for color-changing of an amorphous alloy, characterized in that, the color-changing method comprises: using a pulsed current to perform color-changing treatment on the surface of an initial amorphous alloy to obtain an amorphous alloy with a color layer on its surface.

2. The color-changing method according to claim 1, characterized in that, the pulse period of the pulsed current is 200 - 400 ms; preferably, the pulse width of the pulsed current is 100 - 200 ms; preferably, the number of pulses of the pulsed current is 10 - 100000 times, preferably 25 - 2000 times.

3. The color-changing method according to claim 1 or 2, characterized in that, when the visible light wavelength range of the color of the color layer is 570 - 595 nm in the visible light region, the number of pulses of the pulsed current is 25 - 200 times; preferably, when the visible light wavelength range of the color of the color layer is 430 - 480 and 600 - 720 nm in the visible light region, the number of pulses of the pulsed current is 300 - 500 times; preferably, when the visible light wavelength range of the color of the color layer is only 430 - 480 nm in the visible light region, the number of pulses of the pulsed current is 500 - 900 times; preferably, when the visible light wavelength range of the color of the color layer is only 380 - 780 nm in the visible light region, the number of pulses of the pulsed current is 1000 - 2000 times.

4. The color-changing method according to any one of claims 1 - 3, characterized in that, The pulse peak current density of the pulse current is 6.0×10 7 ~9.5×10 7 A / m 2 .

5. The color-changing method according to any one of claims 1 - 4, characterized in that, the color-changing treatment is carried out in an oxygen-containing atmosphere; preferably, the color-changing treatment is carried out in an air atmosphere; preferably, the temperature of the color-changing treatment is -10 - 40 °C.

6. The color-changing method according to any one of claims 1 - 5, characterized in that, the color-changing method comprises: The surface of an initial amorphous alloy with a thickness ≥ 20 μm and a width ≥ 0.8 mm is subjected to color-changing treatment in an oxygen-containing atmosphere by using a pulsed current, and the pulsed peak current density of the pulsed current is 6.0×10 7 ~9.5×10 7 A / m 2 , the pulse period is 200 - 400 ms, the pulse width is 100 - 200 ms, and the number of pulses is 10 - 100000 times, obtaining an amorphous alloy with a color layer on the surface, and the color of the color layer is in the visible light wavelength range of 400 - 800 nm in the visible light region.

7. An amorphous alloy, characterized in that, the amorphous alloy is prepared by using the color-changing method of the amorphous alloy according to any one of claims 1 - 6.

8. The amorphous alloy according to claim 7, characterized in that, The component of the amorphous alloy is Fe a Co b Si c B x P y Cu z alloy composition, where 81 ≤ a ≤ 86 at%, 0 ≤ b ≤ 4 at%, 0 ≤ c ≤ 8 at%, 4 ≤ x ≤ 10 at%, 1 ≤ y ≤ 4 at%, 0.3 ≤ z ≤ 1.3 at%. preferably, the surface of the amorphous alloy has a color layer, and the color of the color layer is different from the main color of the amorphous alloy; the color of the color layer is in the visible light region; preferably, the thickness of the amorphous alloy ≥ 20 μm; preferably, the width of the amorphous alloy ≥ 0.8 mm; preferably, the length of the amorphous alloy is 45 - 55 mm; preferably, the visible light wavelength range of the color of the color layer is 400 - 800 nm in the visible light region; preferably, the color of the color layer includes any one or a combination of at least two of yellow, gold, purple, blue-black, blue or white.

9. The amorphous alloy according to claim 7 or 8, characterized in that, the XRD spectrum of the amorphous alloy does not contain oxide peaks; preferably, the DSC curve of the amorphous alloy does not contain oxide peaks; preferably, the soft magnetic properties of the amorphous alloy are equivalent to those of the initial amorphous alloy.

10. Use of the amorphous alloy according to any one of claims 7 to 9 in sports equipment, electronic products, coating materials or acoustic materials.

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