Preparation method of La-doped W-Cu composite powder
A composite powder, w-cu technology, applied in coating and other directions, can solve the problems of easy introduction of impurities, long processing time, and difficulty in mass production in the preparation method, and achieve low preparation cost, high degree of homogenization, and high degree of densification. Effect
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Embodiment 1
[0019] 1. Preparation of activated tungsten powder
[0020] The tungsten powder with a particle size of less than 1 micron is placed in the activation solution for ultrasonic activation for 30 minutes, the ultrasonic frequency is 40KHz, and the power is 300-400W. After the activation is completed, it is washed three times with deionized water and dried at 200 ° C for 1 hour to obtain activated tungsten powder. ;
[0021] The activation solution is an aqueous solution of hydrofluoric acid, ammonium fluoride and nitric acid, and the concentration of hydrofluoric acid in the activation solution is 60 ml / L, calculated as a hydrofluoric acid solution with a mass concentration of 40%; the concentration of ammonium fluoride is 9g / L; the concentration of nitric acid is 60ml / L, calculated as a nitric acid solution with a mass concentration of 65%;
[0022] 2. Preparation of composite powder
[0023] The activated tungsten powder was added to the chemical deposition solution, the amou...
Embodiment 2
[0029] 1. Preparation of activated tungsten powder
[0030] The tungsten powder with a particle size of less than 1 micron is placed in the activation solution for ultrasonic activation for 40 minutes, the ultrasonic frequency is 40KHz, and the power is 300-400W. After the activation is completed, it is washed three times with deionized water and dried at 180 ° C for 3 hours to obtain activated tungsten powder. ;
[0031] The activation solution is an aqueous solution of hydrofluoric acid, ammonium fluoride and nitric acid, and the concentration of hydrofluoric acid in the activation solution is 30 ml / L, calculated as a hydrofluoric acid solution with a mass concentration of 40%; the concentration of ammonium fluoride is 8g / L; the concentration of nitric acid is 80ml / L, calculated as a nitric acid solution with a mass concentration of 65%;
[0032] 2. Preparation of composite powder
[0033] The activated tungsten powder was added to the chemical deposition solution, the amo...
Embodiment 3
[0039] 1. Preparation of activated tungsten powder
[0040] The tungsten powder with a particle size of less than 1 micron is placed in the activation solution for ultrasonic activation for 35 minutes, the ultrasonic frequency is 40KHz, and the power is 300-400W. After the activation is completed, it is washed three times with deionized water and dried at 190 ° C for 2 hours to obtain activated tungsten powder. ;
[0041]The activation solution is an aqueous solution of hydrofluoric acid, ammonium fluoride and nitric acid, and the concentration of hydrofluoric acid in the activation solution is 50 ml / L, calculated as a hydrofluoric acid solution with a mass concentration of 40%; the concentration of ammonium fluoride is 10g / L; the concentration of nitric acid is 50ml / L, calculated as a nitric acid solution with a mass concentration of 65%;
[0042] 2. Preparation of composite powder
[0043] The activated tungsten powder was added to the chemical deposition solution, the amo...
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