In-situ synthesized Al2O3 reinforced molybdenum based composite material and preparation method thereof
An in-situ self-generated and composite material technology, applied in the field of molybdenum-based composite materials and its preparation, achieves the effects of simple preparation and production process, easy control, and broad application prospects
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Embodiment 1
[0031] This example prepares a high-temperature wear-resistant molybdenum-based composite material. The molybdenum oxide used is molybdenum dioxide powder, and the reaction is as follows: 4Al+3MoO 2 =Mo+2Al 2 o 3 conduct. According to mass ratio Al:MoO 2 For 1:111 ratio:
[0032] Aluminum powder 0.89%
[0033] Molybdenum Dioxide 99.10%
[0034] Impurity content <0.1%
[0035] Put the above powder raw materials into a ball mill and carry out wet mixing for 3 hours under the protection of alcohol at a speed of 240r / min; dry in a vacuum oven at 80°C for 2 hours; in a gas protection furnace at 530°C for 3 hours under nitrogen protection; Reduction in a gas shielded furnace at 930°C for 7 hours under the protection of hydrogen; cold isostatic pressing at a pressure of 200Mpa, holding the pressure for 8 minutes to press the blank; sintering in a vacuum sintering furnace at 1800°C for 16 hours. A volume fraction of 5% Al was obtained 2 o 3 Particle-reinforced molybdenum-base...
Embodiment 2
[0037] This example prepares a high-temperature wear-resistant molybdenum-based composite material. The molybdenum oxide used is molybdenum dioxide powder, and the reaction is as follows: 4Al+3MoO 2 =Mo+2Al 2 o 3 conduct. According to mass ratio Al:MoO 2 For 1:61 ratio:
[0038]Aluminum powder 1.60%
[0039] Molybdenum Dioxide 98.30%
[0040] Impurity content <0.1%
[0041] Add the above powder raw materials into a ball mill for 3 hours of wet mixing under the protection of alcohol at a speed of 240r / min; dry in a vacuum oven at 80°C for 2 hours; in a gas protection furnace at 550°C for 3 hours under nitrogen protection; Reduction in a gas shielded furnace at 940°C for 7 hours under the protection of hydrogen; cold isostatic pressing at a pressure of 180Mpa, holding the pressure for 10 minutes to form a billet; sintering in a vacuum sintering furnace at 1800°C for 16 hours. A volume fraction of 10% Al is obtained 2 o 3 Particle-reinforced molybdenum-based composites. ...
Embodiment 3
[0043] This example prepares a high-temperature molybdenum-based composite material, and the molybdenum oxide used is molybdenum trioxide powder, and the reaction is as follows: 2Al+MoO 3 =Mo+Al 2 o 3 conduct. According to mass ratio Al:MoO 3 The ratio is 1:137.8:
[0044] Aluminum powder 0.72%
[0045] Molybdenum trioxide 99.27%
[0046] Impurity content <0.1%
[0047] Add the above powder raw materials into a ball mill for 3 hours of wet mixing under the protection of alcohol at a speed of 240r / min; dry in a vacuum oven at 80°C for 2 hours; in a gas protection furnace at 540°C for 3 hours under the protection of nitrogen; Reduction at 520°C for 4h and 930°C for 7h in a gas protection furnace under the protection of hydrogen; cold isostatic pressing at a pressure of 220Mpa, holding the pressure for 8 minutes to press the blank; sintering in a vacuum sintering furnace at 1800°C for 16h. A volume fraction of 5% Al was obtained 2 o 3 Particle dispersion reinforced molyb...
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