Aluminum-based amorphous alloy composite material and preparation method thereof
A technology of amorphous alloys and composite materials, which is applied in the field of aluminum-based amorphous alloy composite materials and its preparation, can solve the problems of clothing that is not resistant to acid and alkali, wear and tear, and the surface is easily oxidized, and achieve good wear resistance and corrosion resistance The effect of good performance and good amorphous alloy performance
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preparation example Construction
[0010] In this specific embodiment, the preparation method of aluminum-based amorphous alloy composite material comprises the following steps:
[0011] 1) Prepare an aluminum-based amorphous alloy matrix with the following general formula: Al a Mg b Zr c R d , where a, b, c, d are the weight percentages of the corresponding elements, 85%≤a≤92%, 2%≤b≤10%, 0.5%≤c≤4%, 1%≤d≤6%, and a+b+c+d=1, R is one or more of Ti, La, Gd, Ce, Sc, Hf, Ta, W, Nb.
[0012] In this step, the substrate of the above general formula is prepared for subsequent surface oxidation to obtain an oxide film layer. In the above general formula, the anodic oxidation of Al and Mg in the components is easy to carry out, and the film layer is relatively dense. A small amount of rare earth element R is used to promote the formation of amorphous alloys. At the same time, since the MgO formed after the subsequent oxidation of Mg has a certain degree of hygroscopicity, in order to form a film with good performan...
experiment example 1
[0026] Step 1: Prepare a cuboid Al with a size of 90mm×20mm×3mm (length, width and height respectively) 88 Mg 6 Zr 2 Ti 2 Ce 2 Amorphous alloy substrate.
[0027] Step 2: Surface pretreatment: mechanical polishing, wax removal, oil removal, and finally cleaning with deionized water.
[0028] Step 3: Activated atom oxidation treatment. The electrolyte solution is prepared with sodium dichromate, chromic anhydride and sodium fluoride as the main components, the above-mentioned aluminum-based amorphous alloy is put into the electrolyte solution as the anode, and the lead plate is used as the cathode. Among them, the components of the electrolyte are sodium dichromate 4.5g / L, chromic anhydride 8g / L, and sodium fluoride 4.5g / L. Using pulsed AC power supply, the voltage is 50V, and the current density is 4A / dm 2 , the frequency is 50Hz, the power-on time is 30min, and the temperature of the electrolyte is 50°C. After the electrolysis is completed, a dense oxide film is obtain...
experiment example 2
[0032] The only difference between this experimental example and experimental example 1 is that the anodic oxidation process in step 3 is different. Specific steps are as follows:
[0033] Step 1: The process is the same as in Experimental Example 1.
[0034] Step 2: The process is the same as in Experimental Example 1.
[0035] Step 3: Activated atom oxidation treatment. The electrolyte solution is prepared with sodium dichromate, chromic anhydride and sodium fluoride as the main components, the above-mentioned aluminum-based amorphous alloy is put into the electrolyte solution as the anode, and the lead plate is used as the cathode. Among them, the components of the electrolyte are sodium dichromate 3g / L, chromic anhydride 6g / L, and sodium fluoride 3g / L. Using pulsed AC power supply, the voltage is 40V, and the current density is 3A / dm 2 , the frequency is 50Hz, the electrification time is 20min, and the temperature of the electrolyte is 20°C. After the electrolysis is c...
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