A nanoporous high-entropy alloy microsphere material and its preparation method
A high-entropy alloy and nanoporous technology, which is applied in the field of nanoporous high-entropy alloy microsphere materials and its preparation, can solve the problems of high technical level requirements, non-porous or low porosity, and high cost of additional materials, so as to shorten the process cycle , Reduce the effect of high-precision control and promote rapid transfer
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Embodiment 1
[0035] The first step, smelting to prepare the master alloy ingot
[0036] Select high-purity Cu, Au, Pt and Pd metals as raw materials, and the mass purity of the four elements is 99.99wt%; then according to the target composition Cu 97 Au 1 Pt 1 PD 1 The four kinds of metals required to prepare 10g of alloy, the marked composition is the atomic percentage; the mixed metal raw materials are placed in a vacuum electric arc furnace, and the vacuum is evacuated to an air pressure of 3.0×10 -3 Pa; filled with argon, the argon pressure is 3×10 -2 Start arc melting under the condition of MPa, the melting current is 80A, repeat the melting 4 times, each time for 35s, to ensure the uniformity of the alloy structure, and produce Cu after cooling with the furnace 97 Au 1 Pt 1 PD 1 master alloy ingot;
[0037] The second step, preparation of dealloyed precursor microspheres by spray casting
[0038] After grinding and cleaning the master alloy ingot obtained in the previous ste...
Embodiment 2
[0043] The first step, smelting to prepare the master alloy ingot
[0044] Select high-purity Cu, Au, Pt and Pd metals as raw materials, and the mass purity of the four elements is 99.99wt%; then according to the target composition Cu 99.01 Au 0.33 Pt 0.33 PD 0.33 The four kinds of metals required to prepare 10g of alloy, the marked composition is the atomic percentage; the mixed metal raw materials are placed in a vacuum electric arc furnace, and the vacuum is evacuated to an air pressure of 3.0×10 -3 Pa; filled with argon, the argon pressure is 3×10 -2 Start arc melting under the condition of MPa, the melting current is 70A, repeat the melting 5 times, each time for 30s, to ensure the uniformity of the alloy structure, and produce Cu after cooling with the furnace 99.01 Au 0.33 Pt 0.33 PD 0.33 master alloy ingot;
[0045] The second step, preparation of dealloyed precursor microspheres by spray casting
[0046] After grinding and cleaning the master alloy ingot obta...
Embodiment 3
[0051] The first step, smelting to prepare the master alloy ingot
[0052] Select high-purity Cu, Au, Pt and Pd metals as raw materials, and the mass purity of the four elements is 99.99wt%; then according to the target composition Cu 94 Au 2 Pt 2 PD 2 The four metals required to prepare 10g of alloy, the marked composition is the atomic percentage; the mixed metal raw materials are placed in a vacuum electric arc furnace, and the vacuum is evacuated to a pressure of 3.0×10 -3 Pa; filled with argon, the argon pressure is 3×10 -2 Start arc melting under the condition of MPa, the melting current is 100A, repeat the melting 3 times, each time for 40s, to ensure the uniformity of the alloy structure, and produce Cu after cooling with the furnace 94 Au 2 Pt 2 PD 2 master alloy ingot;
[0053] The second step, preparation of dealloyed precursor microspheres by spray casting
[0054] After grinding and cleaning the master alloy ingot obtained in the previous step, take 4g of...
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