A kind of mo‑si‑b‑hf‑al alloy rod and preparation method thereof
An alloy bar, mo-si-b-hf-al technology, applied in the field of Mo-Si-B-Hf-Al alloy bar and its preparation, can solve the problem of reducing the grain boundary bonding strength of the material, the material has holes, Easy to produce microcracks and other problems, to achieve the effect of improving room temperature toughness and high temperature strength, anti-oxidation room temperature fracture toughness, and good room temperature fracture toughness
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Embodiment 1
[0027] The Mo-Si-B-Hf-Al alloy bar of this embodiment is characterized in that it is made of the following atomic percentage raw materials: Si 14%, B 16%, Hf 10%, Al 10%, and the balance is Mo and unavoidable impurities.
[0028] The preparation method of the present embodiment Mo-Si-B-Hf-Al alloy bar comprises the following steps:
[0029] Step 1. Put silicon powder, boron powder, hafnium powder, aluminum powder and molybdenum powder in a ball mill, use absolute ethanol as a dispersant, and wet ball mill at a speed of 350 rpm and a mass ratio of ball to material of 9:1. After 20 hours, dry under vacuum conditions after ball milling to obtain mixed powder; the volume of the absolute ethanol is 1.5 times the sum of the mass of silicon powder, boron powder, hafnium powder, aluminum powder and molybdenum powder, wherein the unit of volume is mL , the unit of mass is g, the mass purity of the silicon powder, boron powder, hafnium powder, aluminum powder and molybdenum powder is n...
Embodiment 2
[0040] The Mo-Si-B-Hf-Al alloy bar of this embodiment is characterized in that it is made of the following atomic percentage raw materials: Si 8%, B 9%, Hf 13%, Al 12%, and the balance is Mo and unavoidable impurities.
[0041] The preparation method of the present embodiment Mo-Si-B-Hf-Al alloy bar comprises the following steps:
[0042] Step 1. Put silicon powder, boron powder, hafnium powder, aluminum powder and molybdenum powder in a ball mill, use absolute ethanol as a dispersant, and wet ball mill at a speed of 300 rpm and a mass ratio of ball to material of 6:1. 10h, after ball milling, dry under vacuum conditions to obtain mixed powder; the volume of the absolute ethanol is twice the sum of the mass of silicon powder, boron powder, hafnium powder, aluminum powder and molybdenum powder, wherein the unit of volume is mL , the unit of mass is g, the mass purity of the silicon powder, boron powder, hafnium powder, aluminum powder and molybdenum powder is not less than 99%...
Embodiment 3
[0049] The Mo-Si-B-Hf-Al alloy bar of this embodiment is characterized in that it is made of the following atomic percentages: 16%, B17%, Hf 7%, Al 8%, and the balance is Mo and unavoidable of impurities.
[0050] The preparation method of the present embodiment Mo-Si-B-Hf-Al alloy bar comprises the following steps:
[0051] Step 1. Put silicon powder, boron powder, hafnium powder, aluminum powder and molybdenum powder in a ball mill, use absolute ethanol as a dispersant, and wet ball mill at a speed of 400 rpm and a mass ratio of ball to material of 12:1. 30h, dry under vacuum condition after ball milling, obtain mixed powder; The volume of described dehydrated alcohol is 3 times of the sum of the mass of silicon powder, boron powder, hafnium powder, aluminum powder and molybdenum powder, wherein the unit of volume is mL, the unit of mass is g, the mass purity of the silicon powder, boron powder, hafnium powder, aluminum powder and molybdenum powder is not less than 99%, the...
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