Rare-earth base amorphous alloy and method of preparing the same
An amorphous alloy and rare earth-based technology, which is applied in the field of amorphous alloy and its preparation, can solve the problems such as inability to obtain strength, and achieve the effects of good amorphous formation ability, large critical size, and excellent hardness
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[0015] The preparation method of the rare earth-based amorphous alloy of the present invention comprises: melting and cooling the amorphous alloy raw material under a protective gas, characterized in that the amorphous alloy raw material is formulated according to the general formula Re a Al b m c N d In the formula, Re is at least two of La, Ce, Pr and Nd, and M is one of Fe, Co, Ni, Cu, Zn, Ge, As, Zr, Mo, Pd and Ag or several, N is one or more of Y, Hf and Nb, 30≤a≤70, 5≤b≤40, 15≤c≤40, 0.1≤d≤10, and a+b+c+ d=100; a, b, c, d are mole percentages.
[0016] Preferably, the RE is a mixture of La and at least one of Ce, Pr and Nd. Wherein, the molar ratio of La to the total amount of Ce, Pr and Nd can be any ratio, and the molar ratio of La to the total amount of Ce, Pr and Nd is preferably 0.5-3, more preferably 1-2. Under the above preferred conditions, the amorphous alloy prepared by the present invention has more excellent bending strength and hardness, and has good amo...
Embodiment 1
[0023] This example illustrates the rare earth-based amorphous alloy provided by the present invention and its preparation method.
[0024] 200 grams of amorphous alloy raw materials are dropped into an electric arc melting furnace (Shenyang Scientific Instrument Factory), the electric arc melting furnace is evacuated, and argon gas with a purity of 98% by volume is used as the protective gas (the volume content of the impurity gas is 2000ppm), at 1000 Under the condition of ℃, smelt for 5 minutes to fully melt the amorphous alloy raw material. The composition of the amorphous alloy raw material is 20 mol% of La, 10 mol% of Ce, 26 mol% of Al, 10 mol% of Cu, 15 mol% of Ni, 11 mol% of Co, 1 mol% of Fe and 7 mol% Nb.
[0025] The molten alloy sample was then subjected to 10 3 The cooling rate of K / s was used to cool the water-cooled copper mold, and then melted and cooled again according to the above method, and cast into an amorphous alloy sample A1 with a size of 3mm×10mm×100...
Embodiment 2
[0027] This example illustrates the rare earth-based amorphous alloy provided by the present invention and its preparation method.
[0028] 200 grams of amorphous alloy raw materials are dropped into an electric arc melting furnace (Shenyang Scientific Instrument Factory), the electric arc melting furnace is evacuated, and argon with a purity of 98% by volume is used as the protective gas (the volume content of the impurity gas is 2000ppm), at 900 Under the condition of ℃, smelt for 4 minutes to fully melt the amorphous alloy raw material. The composition of the amorphous alloy raw material is 30 mol % La, 30 mol % Pr, 15 mol % Al, 10 mol % Ge, 10 mol % Zr, 5 mol % Y.
[0029] The molten alloy sample was then subjected to 10 3The cooling rate is K / s for water-cooled copper mold cooling, and then melted and cooled again according to the above method, and cast into an amorphous alloy sample A2 with a size of 3mm×10mm×100mm. Elemental analysis shows that the composition of the ...
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