Samarium based amorphous alloy and preparation method thereof
An amorphous alloy and master alloy ingot casting technology, which is applied in the field of samarium-based bulk amorphous alloys, can solve the problems of limited application range, low glass transition and crystallization temperature, and reduced critical cooling rate, and achieves strong crystallization inhibition ability. , the effect of high crystallization temperature and high glass transition temperature
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Embodiment 1
[0029] Embodiment 1, preparation Sm 40 Y 15 al 25 co 20 Samarium-based bulk amorphous alloy
[0030] The purity of the raw material is 99.9% (weight percent) Sm, Y, Al and Co four components in a molar ratio of 40:15:25:20, mixed in an electric arc furnace with an argon atmosphere adsorbed by titanium Uniform and smelting, after cooling, the master alloy ingot of Sm-Y-Al-Co quaternary alloy is obtained; The alloy melt is sucked into the water-cooled copper mold, and the composition can be obtained as Sm 40 Y 15 al 25 co 20 , a bulk amorphous alloy with a diameter of 3 mm.
[0031] From such as figure 1 The X-ray diffraction (XRD) shown can prove that the alloy is a completely amorphous alloy. figure 2 for Sm 40 Y 15 al 25 co 20 Thermal analysis (DSC and DTA) diagrams of samarium-based bulk amorphous alloys, as can be seen from the figure: its glass transition temperature (T g ), crystallization onset temperature (T x ), melting onset temperature (T m ) and th...
Embodiment 2
[0032] Embodiment 2, preparation Sm 40 Nd 15 al 25 co 20 Samarium-based bulk amorphous alloy
[0033] After the purity of the raw material is more than 99.9% (weight percent), the four components of Sm, Nd, Al and Co are prepared in a molar ratio of 40:15:25:20, and the titanium is adsorbed in an electric arc furnace with an argon atmosphere. Mix evenly and smelt, and obtain the master alloy ingot of Sm-Nd-Al-Co quaternary alloy after cooling; then use the conventional metal mold casting method to remelt the ingot, and use the suction casting device in the electric arc furnace to The master alloy melt is sucked into the water-cooled copper mold, and the composition can be obtained as Sm 40 Nd 15 al 25 co 20 , a bulk amorphous alloy with a diameter of 2 mm.
[0034] From such as figure 1 The X-ray diffraction (XRD) shown can prove that the alloy is a completely amorphous alloy. image 3 for Sm 40 Nd 15 al 25 co 20 Thermal analysis (DSC and DTA) diagrams of samariu...
Embodiment 3
[0035] Embodiment 3, preparation Sm 45 Nd 10 al 25 co 20 Samarium-based bulk amorphous alloy
[0036] After the purity of the raw material is more than 99.9% (weight percent), the four components of Sm, Nd, Al and Co are prepared in a molar ratio of 45:10:25:20, and the titanium is adsorbed in an electric arc furnace with an argon atmosphere. Mix evenly and smelt, and obtain the master alloy ingot of Sm-Nd-Al-Co quaternary alloy after cooling; then use the conventional metal mold casting method to remelt the ingot, and use the suction casting device in the electric arc furnace to The master alloy melt is sucked into the water-cooled copper mold, and a 2mm samarium-based bulk amorphous alloy Sm can be obtained 45 Nd 10 al 25 co 20 .
[0037] From such as figure 1 The X-ray diffraction (XRD) shown can prove that the alloy is a completely amorphous alloy. Figure 4 for Sm 45 Nd 10 al 25 co 20 Thermal analysis (DSC and DTA) diagrams of samarium-based bulk amorphous a...
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