Preparation method of nano-scale TiB2/Fe/Ni/Ti composite ceramic
A composite ceramic and nano-scale technology, applied in the field of cermet materials, can solve the problems of room temperature brittleness, high production cost, poor sinterability, etc., and achieve the effect of overcoming low purity
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Embodiment 1
[0025] A nanoscale TiB 2 The preparation method of / Fe / Ni / Ti composite ceramics, concrete steps are as follows:
[0026] (1) Nano-TiB 2 Powder preparation
[0027] The powdered raw material 69.6g B 2 o 3 , 95.8g TiO 2 , 111.4g Mg and 48.7g KBH 4 Add it into the high-speed mixer according to the mass ratio of 1:1.2:1.6:0.7, and mix for 20 minutes under the condition of 18000 rpm. Mix evenly, then put it into a self-propagating reactor, under the protection of argon, the temperature is 700°C, the heating rate is 100°C / min, the tungsten wire is energized to ignite the reaction, and finally cooled naturally to room temperature to obtain the self-propagating reaction product. Soak in acid solution for 24 hours, then filter and wash with water, and dry the filter cake at 80°C for 12 hours to obtain nano-TiB 2 Powder material, the particle size range is 20-120nm, and the purity is 92%.
[0028] (2) Mixing by mechanical ball milling
Embodiment 2
[0033] A nanoscale TiB 2 The preparation method of / Fe / Ni / Ti composite ceramics, concrete steps are as follows:
[0034] (1) Nano-TiB 2 Powder preparation
[0035] The powder raw material 69.2g B 2 o 3 , 111.4g TiO 2 , 97.5g Mg and 13.9g KBH 4According to the mass ratio of 1:1.6:1.4:0.2, add it into the high-speed mixer, and mix it for 40 minutes under the condition of 18000 rpm. Mix evenly, pour the mixed powder into a steel mold, use a 500-ton tablet press, hold the pressure for 60 minutes, put the block into a self-propagating reactor, and ignite it with a tungsten wire under the protection of argon and room temperature . Finally, naturally cool to room temperature to obtain the self-propagating reaction product, then soak in acid solution for 27 hours, then filter, wash with water, and dry the filter cake at 80°C for 16 hours to obtain nano-TiB 2 Powder material with a particle size range of 40nm and a purity of 85%.
[0036] (2) Mixing by mechanical ball milling ...
Embodiment 3
[0041] A nanoscale TiB 2 The preparation method of / Fe / Ni / Ti composite ceramics, concrete steps are as follows:
[0042] (1) Nano-TiB 2 Powder preparation
[0043] The powdered raw material 69.6g B 2 o 3 , 139.2g TiO 2 , 69.6g Mg and 69.6g KBH 4 Add it into the high-speed mixer according to the mass ratio of 1:2:1:1, and mix for 40 minutes under the condition of 18000 rpm. Mix evenly, then put it into a self-propagating reactor, under the protection of argon, the temperature is 850°C, the heating rate is 100°C / min, the tungsten wire is energized to ignite the reaction, and finally cooled naturally to room temperature to obtain the self-propagating reaction product. Soak in acid solution for 30 hours, then filter and wash with water, and dry the filter cake at 80°C for 24 hours to obtain nano-TiB 2 Powder material, the particle size range is 30nm, and the purity is 90%.
[0044] (2) Mixing by mechanical ball milling
[0045] Mix 7ml metal powder (3ml Fe, 1ml Ni, 3ml Ti)...
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