A magnesium-based amorphous composite material, a preparation method and application thereof
By introducing titanium particles into a magnesium alloy matrix and preparing magnesium-based composite materials using a strip spinning method, the problems of low Young's modulus and poor toughness of magnesium-based amorphous alloys at room temperature were solved, resulting in high-strength and high-toughness composite materials with excellent room-temperature mechanical properties and biomedical value.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- GUANGDONG INST OF NEW MATERIALS
- Filing Date
- 2026-03-31
- Publication Date
- 2026-06-09
Smart Images
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Abstract
Description
Technical Field
[0001] This invention belongs to the field of alloy materials technology, and specifically relates to a magnesium-based amorphous composite material, its preparation method, and its application. Background Technology
[0002] Magnesium alloys are lightweight alloys that are abundant in resources, low in cost, and have high specific strength, making them widely used in industries such as automobiles and electronics. However, due to the crystalline structure of magnesium alloys, their absolute strength is relatively low. Since the discovery of amorphous magnesium alloys in 1988, research on magnesium-based amorphous alloys has made great progress. Magnesium-based amorphous alloys lack grain boundaries and dislocations, resulting in higher strength than crystalline magnesium alloys. Currently developed magnesium-based amorphous materials include the Mg–Cu–Y, Mg–Ni–Y, Mg–Cu–Gd, and Mg–Zn–Ca series. Among them, Mg-Zn-Ca amorphous alloys not only possess low density, low cost, high specific strength, and good corrosion resistance, but also exhibit excellent hydrogen storage performance, making them a promising material and attracting attention from the biological, materials, and medical communities. However, Mg-Zn-Ca amorphous alloys have a low Young's modulus at room temperature and poor toughness, which severely restricts their engineering applications. Summary of the Invention
[0003] In order to overcome at least one of the technical problems existing in the prior art, one of the objectives of the present invention is to provide a magnesium-based composite material.
[0004] The second objective of this invention is to provide a method for preparing magnesium-based composite materials.
[0005] The third objective of this invention is to provide the application of the above-mentioned magnesium-based composite material in transportation equipment, mechanical equipment or electronic equipment.
[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A first aspect of the present invention provides a magnesium-based composite material comprising a magnesium alloy matrix and titanium particles distributed in the magnesium alloy matrix; The mass of the titanium particles is 0.5-5% of the total mass of the magnesium matrix. The magnesium alloy matrix comprises the following components by mass percentage: Zn 20-40%, Ca 3-10%, Mg 50-77%; The magnesium-based composite material is an amorphous material.
[0007] In some embodiments of the present invention, the mass of the titanium particles is any one of the following values, or a range formed by any two, of the total mass of the magnesium matrix: 0.5%, 0.8%, 1%, 1.2%, 1.4%, 1.5%, 1.6%, 1.8%, 2%, 2.2%, 2.4%, 2.5%, 2.6%, 2.8%, 3%, 3.2%, 3.4%, 3.5%, 3.6%, 3.8%, 4%, 4.2%, 4.4%, 4.5%, 4.6%, 4.8%, and 5%. If the Ti particle content is less than 0.5%, the improvement on the Young's modulus of the composite material is limited; if the titanium particle content is greater than 5%, the toughness of the composite material decreases.
[0008] In some embodiments of the present invention, the mass percentage of Zn in the magnesium alloy matrix is any value or a range formed by any two of the following: 20%, 22%, 24%, 26%, 28%, 30%, 32%, 34%, 36%, 38%, and 40%. If the Zn content is less than 20%, the composite material has poor amorphous forming ability; if the Zn content exceeds 40%, the plasticity of the composite material decreases sharply and its brittleness increases.
[0009] In some embodiments of the present invention, the mass percentage of Ca in the magnesium alloy matrix is any value or a range formed by any combination of 3%, 4%, 5%, 6%, 7%, 8%, 9%, and 10%. When the Ca content is within the range defined by the present invention, the strength and biodegradability of the magnesium alloy can be improved. When the Ca content exceeds 10%, the toughness of the composite material decreases significantly, and the amorphous formation ability is also affected.
[0010] In some embodiments of the present invention, the mass percentage of Mg in the magnesium alloy matrix is any value or a range formed by any two of the following: 50%, 52%, 54%, 56%, 58%, 60%, 62%, 64%, 66%, 68%, 70%, 72%, 74%, 76%, 77%.
[0011] In some embodiments of the present invention, the particle size of the titanium particles is 1-50 μm; in some embodiments of the present invention, the particle size of the titanium particles is any value or a range formed by any two of 1 μm, 5 μm, 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, and 50 μm.
[0012] In some embodiments of the present invention, the total mass of Ca and Zn is 35-50% of the total mass of the magnesium alloy matrix; in other embodiments, the total mass of Ca and Zn is any value or a range formed by any two of 35%, 36%, 38%, 40%, 42%, 44%, 45%, 46%, 48%, and 50% of the total mass of the magnesium alloy matrix. In this invention, if the total content of Ca and Zn is greater than 50%, coarse interfacial compounds appear around the titanium particles, affecting the toughness of the composite material. Simultaneously, the amorphous forming ability of the alloy decreases, and crystalline structures easily form in the composite material, thereby affecting the room temperature mechanical properties of the composite material.
[0013] In some embodiments of the present invention, the magnesium-based composite material is in the form of a strip.
[0014] In some embodiments of the present invention, the thickness of the magnesium-based composite material is 0.5 mm to 1.5 mm; in some embodiments of the present invention, the thickness of the magnesium-based composite material is any value of 0.5 mm, 0.6 mm, 0.8 mm, 1.0 mm, 1.2 mm, 1.4 mm, 1.5 mm or a range formed by any two of these values.
[0015] The second aspect of the present invention provides a method for preparing the magnesium-based composite material described in the first aspect of the present invention, comprising the following steps: The semi-solid melt of the magnesium alloy matrix is mixed with titanium particles and then cast to obtain an ingot; The ingot is heated and melted, and then processed into shape using a strip spinning method to obtain the magnesium-based composite material.
[0016] In some embodiments of the present invention, the semi-solid melt of the magnesium alloy matrix is formed by heating the raw materials used to prepare the magnesium alloy matrix in a vacuum environment, thereby melting the raw materials used to prepare the magnesium alloy matrix to form a semi-solid melt.
[0017] In some embodiments of the present invention, the ingot is prepared by adding titanium particles to a semi-solid melt of a magnesium alloy matrix in a vacuum environment, stirring evenly, and then casting it into shape.
[0018] In some embodiments of the present invention, the oxide scale on the surface of the ingot needs to be removed before it is heated and melted.
[0019] In some embodiments of the present invention, the temperature for heating and melting is 500-600°C; in some embodiments of the present invention, the temperature for heating and melting is any value or a range formed by any two of 500°C, 510°C, 520°C, 530°C, 540°C, 550°C, 560°C, 570°C, 580°C, 590°C, and 600°C.
[0020] In some embodiments of the present invention, the gas pressure during the heating and melting process is 10-100 Pa; in some embodiments of the present invention, the gas pressure during the heating and melting process is any value of 10 Pa, 20 Pa, 30 Pa, 40 Pa, 50 Pa, 60 Pa, 70 Pa, 80 Pa, 90 Pa, 100 Pa, or a range formed by any two of these values.
[0021] In some embodiments of the present invention, the heating and melting are carried out under the protection of a mixed gas of CO2 and SF6.
[0022] In some embodiments of the present invention, the belt-spinning method is performed at a cooling rate of 5 × 10⁻⁶. 4 -2×10 5 Cooling is performed at ℃ / s. If the cooling rate is too low, the magnesium alloy matrix crystallizes, making it difficult to obtain a composite material with an amorphous matrix. If the cooling rate is too high, the melt feeding ability is poor, and the prepared strip is prone to forming voids and defects, thus affecting the various properties of the composite material.
[0023] In some embodiments of the present invention, the cooling rate is 5 × 10⁻⁶. 4 ℃ / s, 6×10 4 ℃ / s, 7×10 4 ℃ / s, 8×10 4 ℃ / s, 9×10 4 ℃ / s, 1×10 5 ℃ / s, 1.5×10 5 ℃ / s, 2×10 5 Any value in ℃ / s, or a range of values formed by any two of them.
[0024] In some embodiments of the present invention, the heating and melting are performed using an induction coil.
[0025] In some embodiments of the present invention, the frequency of the induction coil is 900-1200Hz; in some embodiments of the present invention, the frequency of the induction coil is any value of 900Hz, 950Hz, 1000Hz, 1050Hz, 1100Hz, 1150Hz, 1200Hz or a range formed by any two of them.
[0026] In some embodiments of the present invention, the belt spinning method is carried out in a vacuum belt spinning furnace.
[0027] In some embodiments of the invention, the ingot is located in a quartz crucible of the vacuum spinning furnace.
[0028] The third aspect of the invention provides the application of the magnesium-based composite material described in the first aspect of the invention in transportation equipment, mechanical equipment or electronic equipment.
[0029] The beneficial effects of this invention are as follows: Compared with existing amorphous alloy materials, the magnesium-based amorphous composite material of this invention has a higher Young's modulus, higher strength, and higher toughness. Specifically, the compressive strength of the composite material is 928-1032 MPa, the compressive strain is 1.5-2.5%, and the elastic modulus is 92.1-95.6 GPa. Furthermore, the reinforcing titanium particles introduced into the composite material have good biocompatibility and biomedical value. Attached Figure Description
[0030] Figure 1 The flowchart shows the preparation methods of Examples 1-9.
[0031] Figure 2 This is a SEM image of the composite material in Example 1.
[0032] Figure 3 The image shows the SEM image of the composite material in Comparative Example 1.
[0033] Figure 4 This is a SEM image of the composite material in Comparative Example 7.
[0034] Figure 5 This is a SEM image of the composite material in Comparative Example 8.
[0035] Figure 6 The images show the XRD patterns of the composite materials in Example 1 and Comparative Example 1. Detailed Implementation
[0036] The specific implementation of the present invention will be further described in detail below with reference to the accompanying drawings and examples, but the implementation and protection of the present invention are not limited thereto. It should be noted that any processes not specifically described in detail below are those that can be implemented or understood by those skilled in the art by referring to the prior art. Reagents or instruments used without specified manufacturers are all conventional products that can be purchased commercially.
[0037] The raw material information used in the following examples and comparative examples is as follows: The Mg-30Zn-7.5Ca alloy is composed of the following components by mass percentage: Zn 30%, Ca 7.5%, Mg 62.5%.
[0038] The Mg-20Ca master alloy is composed of 20% Ca and 80% Mg by mass.
[0039] like Figure 1As shown, the composite materials in the embodiments and comparative examples of this invention are prepared using a strip spinning method. The specific process is as follows: The composite material ingot prepared in step 1 is placed in a quartz crucible of a vacuum strip spinning furnace in a protected atmosphere. An opening is made at the bottom of the quartz crucible, and this opening is pre-sealed with a plug. An induction coil is installed inside the vacuum strip spinning furnace, and the quartz crucible is placed in the center of the induction coil. The induction coil is connected to a medium-frequency power supply. The medium-frequency power supply is turned on, and the composite material ingot in the quartz crucible is heated by the induction coil. When the composite material ingot melts and the melt temperature reaches 500-600℃, the plug at the bottom of the quartz crucible is removed, and the melt flows out from the opening, pouring onto the surface of a water-cooled copper roller rotating at a certain cooling rate to obtain the composite material strip.
[0040] The cooling rate of the water-cooled copper roller is calculated theoretically, using a method described in existing technologies. Taking Example 1 as an example, the specific calculation process is as follows: The initial conditions and physical parameters required for the following calculations are shown in Table 1 below.
[0041] Table 1. Parameters required for cooling rate calculation
[0042] Among them, T 10 and T 20 These represent the temperature of the magnesium-based composite alloy billet after melting (i.e., the temperature before strip casting) and the temperature of the copper roller (K); x is the distance from the interface (m), i.e., the vertical distance between the bottom drain hole of the quartz crucible and the upper surface of the copper roller in the vacuum strip casting furnace; t is the cooling time (s), and ρ is the density (kg / m³). 3 The water displacement method was used for testing, and the specific test method refers to GB / T 3850-2015; c is the specific heat capacity (J / (J / kg·℃)), L is the latent heat of crystallization (kJ / kg), and the specific heat capacity and latent heat of crystallization were measured by differential scanning calorimetry (DSC); k is the thermal conductivity (W / (m·℃)), which was measured according to the test method described in ASTM E1225-25 standard.
[0043] Since the melting point of Ti was not reached, the latent heat of crystallization of Ti was not considered.
[0044]
[0045]
[0046] Where ξ is the average thickness of the magnesium-based amorphous composite material prepared by rapid solidification;
[0047] The cooling rate at thickness x is given by equation (9).
[0048] Where T e The temperature was the eutectic temperature of 437℃, and the solidification time was t = 5.663 × 10⁻⁶. -4 s;
[0049] Substituting t = 5.663 × 10 -4 From equation (10), we get the cooling rate as 1.56669 × 10⁻⁶. 5 ℃ / s.
[0050] In the above formula, erf is the error function, and exp is the exponent, a fixed function, for example, exp(y) = e y . L 1: Latent heat of crystallization of the base magnesium alloy; L 2: Latent heat of crystallization of titanium; ω: The proportion of the mass of titanium particles to the mass of the composite material. Taking Example 1 as an example, ω is equal to 0.025. T e The eutectic temperature of the base magnesium alloy; T i This refers to the temperature at which the molten material forms at the bottom of the strip the instant it comes into contact with the copper roller; it can also be called the sudden change temperature. The cooling rates in other embodiments and comparative examples in this case can be calculated using the above calculation formulas and methods.
[0051] Example 1 This example provides a magnesium-based amorphous composite material, which is composed of a magnesium alloy matrix and titanium particles distributed in the magnesium alloy matrix; The mass of the titanium particles is 2.5 wt% of the total mass of the magnesium alloy matrix; The magnesium alloy matrix is composed of the following components by mass percentage: Zn 30%, Ca 7.5%, Mg 62.5%.
[0052] This example provides a method for preparing a magnesium-based amorphous composite material, the specific steps of which are as follows: Step 1: Prepare the raw materials according to the elemental composition of the Mg-30Zn-7.5Ca alloy. The raw materials are magnesium ingots with a purity of 99.99%, zinc ingots with a purity of 99.99%, and Mg-20Ca master alloy. Using a vacuum stirring furnace, under vacuum conditions, 10µm titanium particles are added to the Mg-30Zn-7.5Ca semi-solid melt at a dosage of 2.5wt%. After uniform stirring, it is cast to form a composite material ingot.
[0053] Step 2: Remove the oxide scale from the surface of the composite material ingot, then place it into a quartz crucible inside a vacuum spinning furnace, cover the furnace, and evacuate the furnace to a vacuum level of 5×10⁻⁶. -4 Pa; then a mixture of CO2 and SF6 gas is introduced. Once the pressure is balanced with the external atmospheric pressure, the pressure reducing valve is opened, and protective gas is introduced while exhaust is performed. The furnace is always kept at a slightly positive pressure of 10-100 Pa.
[0054] Step 3: Turn on the power to the heating system at a frequency of 1000Hz. The composite material ingot is heated using an induction coil. When the melt temperature reaches 740℃, the plug at the bottom of the quartz tube is removed, and the melt is ejected under gravity, spraying onto the copper roller at a temperature of 24℃. During the spraying process, the cooling rate is controlled to 1.57 × 10⁻⁶ by adjusting parameters such as the copper roller speed, cooling water pressure, and flow rate. 5 ℃ / s, finally a thin strip with a thickness of 1.0 mm is obtained.
[0055] Example 2 The only difference between the magnesium-based amorphous composite material in this example and that in Example 1 is that the magnesium alloy matrix in this example is Mg-40Zn-10Ca, which is composed of the following components by mass percentage: Zn 40%, Ca 10%, Mg 50%.
[0056] The only difference between the preparation method of the magnesium-based amorphous composite material in this example and that in Example 1 is that in step 1 of this example, titanium particles with a particle size of 10µm are added to the Mg-40Zn-10Ca semi-solid melt at a dosage of 2.5wt%. After stirring evenly, the mixture is cast to form a composite material ingot.
[0057] Example 3 The only difference between the magnesium-based amorphous composite material in this example and that in Example 1 is that the magnesium alloy matrix in this example is Mg-20Zn-3Ca, which is composed of the following components by mass percentage: Zn 20%, Ca 3%, Mg 77%.
[0058] The difference between the preparation method of the magnesium-based amorphous composite material in this example and that in Example 1 is that in step 1 of this example, titanium particles with a particle size of 10µm are added to the Mg-20Zn-3Ca semi-solid melt at an amount of 2.5wt%. After stirring evenly, the mixture is cast to form a composite material ingot.
[0059] Example 4 The only difference between the magnesium-based amorphous composite material in this example and that in Example 1 is that the magnesium alloy matrix in this example is Mg-40Zn-3Ca, which is composed of the following components by mass percentage: Zn 40%, Ca 3%, Mg 57%.
[0060] The only difference between the preparation method of the magnesium-based amorphous composite material in this example and that in Example 1 is that in step 1 of this example, titanium particles with a particle size of 10µm are added to the Mg-40Zn-3Ca semi-solid melt at a dosage of 2.5wt%. After stirring evenly, the mixture is cast to form a composite material ingot.
[0061] Example 5 The only difference between the magnesium-based amorphous composite material in this example and that in Example 1 is that the magnesium alloy matrix in this example is Mg-20Zn-10Ca, which is composed of the following components by mass percentage: Zn 20%, Ca 10%, Mg 70%.
[0062] The only difference between the preparation method of the magnesium-based amorphous composite material in this example and that in Example 1 is that in step 1 of this example, titanium particles with a particle size of 10µm are added to the Mg-20Zn-10Ca semi-solid melt at a dosage of 2.5wt%. After stirring evenly, the mixture is cast to form a composite material ingot.
[0063] Example 6 The only difference between the magnesium-based amorphous composite material in this example and that in Example 5 is that the mass of the titanium particles in this example is 0.5 wt% of the total mass of the magnesium alloy matrix.
[0064] The only difference between the preparation method of the magnesium-based amorphous composite material in this example and that in Example 1 is that in step 1 of this example, titanium particles with a particle size of 10µm are added to the Mg-20Zn-10Ca semi-solid melt at a dosage of 0.5wt%. After stirring evenly, the mixture is cast to form a composite material ingot.
[0065] Example 7 The only difference between the magnesium-based amorphous composite material in this example and that in Example 5 is that the mass of the titanium particles in this example is 5 wt% of the total mass of the magnesium alloy matrix.
[0066] The difference between the preparation method of the magnesium-based amorphous composite material in this example and that in Example 1 is that in step 1 of this example, titanium particles with a particle size of 10µm are added to the Mg-20Zn-10Ca semi-solid melt at a dosage of 5wt%. After stirring evenly, the mixture is cast to form a composite material ingot.
[0067] Example 8 The magnesium-based amorphous composite material in this example has the same composition as that in Example 1.
[0068] The difference between the preparation method of the magnesium-based amorphous composite material in this example and that in Example 1 is only that: in this example, step 3 is: during the spraying process, the cooling rate is controlled to 5 × 10⁻⁶ by adjusting parameters such as the copper roller speed, cooling water pressure, and flow rate. 4 ℃ / s, finally a thin strip with a thickness of 1.2 mm was obtained.
[0069] Example 9 The magnesium-based amorphous composite material in this example has the same composition as that in Example 1.
[0070] The difference between the preparation method of the magnesium-based amorphous composite material in this example and that in Example 1 is only that: in this example, step 3 is: during the spraying process, the cooling rate is controlled to 1.9 × 10⁻⁶ by adjusting parameters such as the copper roller speed and cooling water pressure and flow rate. 5 ℃ / s, finally a thin strip with a thickness of 0.76 mm was obtained.
[0071] Comparative Example 1 (without titanium, the resulting strip is an amorphous alloy) This example provides a magnesium-based amorphous composite material composed of the following components by mass percentage: Zn 30%, Ca 7.5%, Mg 62.5%.
[0072] The preparation method of the magnesium-based amorphous composite material in this example differs from that in Example 1 only in that step 1 in this example involves batching the materials according to the mass percentage of the elements in the Mg-30Zn-7.5Ca alloy. The raw materials are magnesium ingots with a purity of 99.99%, zinc ingots with a purity of 99.99%, and Mg-20Ca master alloy. A vacuum stirring furnace is used to melt the materials under vacuum conditions, and after the components are stirred evenly, they are cast into ingots.
[0073] Comparative Example 2 The only difference between the magnesium-based amorphous composite material in this example and that in Example 1 is that the mass of the titanium particles is 0.3 wt% of the total mass of the magnesium alloy matrix.
[0074] The difference between the preparation method of the magnesium-based amorphous composite material in this example and that in Example 1 is that in step 1 of this example, titanium particles with a particle size of 10µm are added to the Mg-30Zn-7.5Ca semi-solid melt at a dosage of 0.3wt%. After stirring evenly, the mixture is cast to form a composite material ingot.
[0075] Comparative Example 3 The only difference between the magnesium-based amorphous composite material in this example and that in Example 1 is that the mass of the titanium particles is 7.5 wt% of the total mass of the magnesium alloy matrix.
[0076] The difference between the preparation method of the magnesium-based amorphous composite material in this example and that in Example 1 is that in step 1 of this example, titanium particles with a particle size of 10µm are added to the Mg-30Zn-7.5Ca semi-solid melt at a dosage of 7.5wt%. After stirring evenly, the mixture is cast to form a composite material ingot.
[0077] Comparative Example 4 The only difference between the magnesium-based composite material in this example and that in Example 1 is that the magnesium alloy matrix is composed of the following components by mass percentage: Zn 45%, Ca 7.5%, Mg 47.5%.
[0078] The only difference between the preparation method of the magnesium-based composite material in this example and that in Example 1 is that the ingredients are prepared according to the elemental composition of the Mg-45Zn-7.5Ca alloy in step 1 of this example.
[0079] Comparative Example 5 The only difference between the magnesium-based composite material in this example and that in Example 1 is that the magnesium alloy matrix is composed of the following components by mass percentage: Zn 30%, Ca 12.5%, Mg 57.5%.
[0080] The only difference between the preparation method of the magnesium-based composite material in this example and that in Example 1 is that the ingredients are prepared according to the elemental composition of the Mg-30Zn-12.5Ca alloy in step 1 of this example.
[0081] Comparative Example 6 The only difference between the magnesium-based composite material in this example and that in Example 1 is that the magnesium alloy matrix is composed of the following components by mass percentage: Zn 30%, Ca 2.5%, Mg 67.5%.
[0082] The only difference between the preparation method of the magnesium-based composite material in this example and that in Example 1 is that the ingredients are prepared according to the elemental composition of the Mg-30Zn-2.5Ca alloy in step 1 of this example.
[0083] Comparative Example 7 The only difference between the magnesium-based composite material in this example and that in Example 1 is that the magnesium alloy matrix is composed of the following components by mass percentage: Zn 10%, Ca 7.5%, Mg 82.5%.
[0084] The only difference between the preparation method of the magnesium-based composite material in this example and that in Example 1 is that the ingredients are prepared according to the elemental composition of the Mg-10Zn-7.5Ca alloy in step 1 of this example.
[0085] Comparative Example 8 The magnesium-based composite material in this example has the same composition as that in Example 1.
[0086] The only difference between the preparation method of the magnesium-based composite material in this example and that in Example 1 is that step 3 in this example involves adjusting the cooling rate to 4.3 × 10⁻⁶ during the spraying process by adjusting parameters such as the copper roller speed, cooling water pressure, and flow rate. 4 ℃ / s, finally a thin strip with a thickness of 1.32 mm was obtained.
[0087] Comparative Example 9 The magnesium-based amorphous composite material in this example has the same composition as that in Example 1.
[0088] The difference between the preparation method of the magnesium-based amorphous composite material in this example and that in Example 1 is only that: in this example, step 3 is: during the spraying process, the cooling rate is controlled to 2.3 × 10⁻⁶ by adjusting parameters such as the copper roller speed and cooling water pressure and flow rate. 5 ℃ / s, finally a thin strip with a thickness of 0.52 mm was obtained.
[0089] Performance testing: Scanning electron microscopy (SEM) was used to examine the composite materials prepared in Example 1, Comparative Example 1, Comparative Example 7, and Comparative Example 8, as shown in the following figures. Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown. By Figure 2 It can be seen that the composite material matrix in Example 1 has a uniform and consistent microstructure, without grain structure or grain boundaries. The spherical particles are metallic titanium particles, distributed throughout the matrix alloy, and there is no agglomeration. Figure 3 It can be seen that the composite material matrix of Comparative Example 1 has a uniform and consistent microstructure, with no grain structure or grain boundaries, exhibiting typical amorphous microstructure characteristics. From Figure 4 It can be seen that the spherical phase in the composite material of Comparative Example 7 is titanium particles, the matrix is an amorphous structure, and a large number of second phases are formed around the titanium particles, exhibiting partial crystallization characteristics. Figure 5 It can be seen that the spherical phase in the composite material of Comparative Example 8 is titanium particles, and the matrix structure has undergone complete crystallization.
[0090] The XRD patterns of the composite materials in Example 1 and Comparative Example 1 were measured using an X-ray diffraction analyzer, as shown below. Figure 6 As shown. By Figure 6 It can be seen that Example 1 exhibits titanium and magnesium peaks, indicating that the microstructure is a magnesium-based amorphous matrix, with titanium existing as a second phase. Comparative Example 1 shows typical peak characteristics, indicating that the prepared material is an amorphous material.
[0091] The room temperature compressive properties and strip thickness of the magnesium-based amorphous composite materials prepared in Examples 1-9 and Comparative Examples 1-9 were tested respectively, and then the degree of amorphization of the strips was evaluated. The specific methods are as follows: Room temperature compression performance: Tested according to the test method described in GB / T7314-2017. Strip thickness measurement: The thickness of the strip is measured using vernier calipers.
[0092] Evaluation of the amorphousness of the strip: X-ray diffraction (XRD) was used to determine the phase composition in the magnesium-based amorphous composite material, and the evaluation was carried out in conjunction with SEM images.
[0093] The performance data of the magnesium-based amorphous composite materials prepared in Examples 1-9 and Comparative Examples 1-9, obtained according to the above test methods, are shown in Table 2 below.
[0094] Table 2 Performance test results of magnesium-based amorphous composite materials
[0095] As shown in Table 2, the magnesium-based amorphous composite material prepared by the method of the present invention has a strip thickness of 0.76-1.2 mm, the strip is a completely amorphous material, the compressive strength is 928-1032 MPa, the compressive strain is 1.5-2.5%, and the elastic modulus is 92.1-95.6 GPa, exhibiting excellent room temperature mechanical properties.
[0096] The embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.
Claims
1. A magnesium-based composite material, characterized in that: It includes a magnesium alloy matrix and titanium particles distributed within the magnesium alloy matrix; The mass of the titanium particles is 0.5-5% of the total mass of the magnesium matrix. The magnesium alloy matrix comprises the following components by mass percentage: Zn 20-40%, Ca 3-10%, Mg 50-77%; The magnesium-based composite material is an amorphous material.
2. The magnesium-based composite material according to claim 1, characterized in that: The titanium particles have a particle size of 1-50 μm.
3. The magnesium-based composite material according to claim 1, characterized in that: The total mass of Ca and Zn is 35-50% of the total mass of the magnesium alloy matrix.
4. The magnesium-based composite material according to claim 1, characterized in that: The magnesium-based composite material is in the form of a strip; And / or, the thickness of the magnesium-based composite material is 0.5mm-1.5mm.
5. The method for preparing the magnesium-based composite material according to any one of claims 1-4, characterized in that: Includes the following steps: The semi-solid melt of the magnesium alloy matrix is mixed with titanium particles and then cast to obtain an ingot; The ingot is heated and melted, and then processed into shape using a strip spinning method to obtain the magnesium-based composite material.
6. The method for preparing the magnesium-based composite material according to claim 5, characterized in that: The temperature at which the heating and melting occurs is 500-600℃; And / or, the gas pressure during the heating and melting process is 10-100 Pa; And / or, the heating and melting are carried out under the protection of a CO2 and SF6 mixed gas.
7. The method for preparing the magnesium-based composite material according to claim 5, characterized in that: The aforementioned belt-spinning method is performed at a cooling rate of 5 × 10⁻⁶. 4 -2×10 5 Cooling is performed at ℃ / s.
8. The method for preparing the magnesium-based composite material according to claim 5, characterized in that: The heating and melting process is performed using an induction coil; preferably, the frequency of the induction coil is 900-1200Hz.
9. The method for preparing the magnesium-based composite material according to claim 5, characterized in that: The tape spinning method is carried out in a vacuum tape spinning furnace; the ingot is located in a quartz crucible in the vacuum tape spinning furnace.
10. The use of the magnesium-based composite material according to any one of claims 1-4 in transportation equipment, mechanical equipment or electronic equipment.