High-dispersive-distribution nano-titanium diboride particle reinforced aluminum matrix composite material and preparation method thereof
A technology of nano-titanium diboride and particle-reinforced aluminum, which is applied in the field of advanced metal-matrix composite materials preparation, and can solve the problems of unfavorable high-quality nano-ceramic particles/aluminum-based composite materials, increased thermal cracking tendency of materials, and potential safety hazards in the use of materials, etc. , to achieve the effects of fewer pores/inclusions, improved wettability, and reduced production costs
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Embodiment 1
[0031] Step 1: Put K 2 TiF 6 、KBF 4 The powders were mixed according to the molar ratio of 1:2, and after being fully mixed, they were then added to the pure aluminum melt at a temperature of 800 °C. At the same time, the Nb-Zr alloy ultrasonic amplitude rod was immersed in the melt, and the ultrasonic treatment was performed for 10 minutes. The ultrasonic power was 1.2kW, remove liquid molten salt impurities on the surface of the melt, and obtain Al-TiB after casting 2 master alloy, the resulting Al-TiB 2 TiB in master alloy 2 The mass fraction of particles is 10%.
[0032] Step 2: Al-TiB 2 Master alloy, Al as raw material, prepare 3wt.% TiB 2 Particle reinforced aluminum matrix composites (TiB 2 TiB in particle reinforced aluminum matrix composites 2 The particle mass fraction is 3%), melted at 750° C., and ultrasonicated for 5 minutes with an ultrasonic power of 1.2 kW.
[0033] Step 3: pour the molten aluminum matrix composite material into the steel mold, and at ...
Embodiment 2
[0037] Step 1: Put K 2 TiF 6 、KBF 4 The powders were mixed according to the molar ratio of 1:2. After being fully mixed, they were then added to the pure aluminum melt at a temperature of 750 ° C. At the same time, the Nb-Zr alloy ultrasonic amplitude rod was immersed in the melt, and the ultrasonic treatment was performed for 10 minutes. The ultrasonic power was 1.0kW, remove liquid molten salt impurities on the surface of the melt, and obtain Al-TiB after casting 2 master alloy, the resulting Al-TiB 2 TiB in master alloy 2 The mass fraction of particles is 5%.
[0038] Step 2: Al-TiB 2 Master alloy, Al as raw material, prepare 5wt.% TiB 2 Particle reinforced aluminum matrix composites (TiB 2 TiB in particle reinforced aluminum matrix composites 2 The mass fraction of particles is 5%), melted at 800° C., and ultrasonically treated for 5 minutes.
[0039] Step 3: pour the molten aluminum matrix composite material into the steel mold, and at the same time introduce ult...
Embodiment 3
[0041] Step 1: Put K 2 TiF 6 、KBF 4 The powders were mixed according to the molar ratio of 1:2. After being fully mixed, they were then added to the pure aluminum melt at a temperature of 700 ° C. At the same time, the Nb-Zr alloy ultrasonic amplitude rod was immersed in the melt, and the ultrasonic treatment was performed for 10 minutes. The ultrasonic power was 1.5kW, remove liquid molten salt impurities on the surface of the melt, and obtain Al-TiB after casting 2 master alloy, the resulting Al-TiB 2 TiB in master alloy 2 The mass fraction of particles is 15%.
[0042] Step 2: Al-TiB 2 Master alloy, Al as raw material, prepare 7wt.% TiB 2 Particle reinforced aluminum matrix composites (TiB 2 TiB in particle reinforced aluminum matrix composites 2 The particle mass fraction is 7%), melted at 750° C., and treated with ultrasonic treatment for 5 minutes, and the ultrasonic power was 1.5 kW.
[0043] Step 3: pour the molten aluminum matrix composite material into the s...
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