Self-propagating synthesis and application of copper-based composite powder
A copper-based composite powder and self-propagating technology, which is applied in the field of copper-based composite powder and its preparation, can solve problems affecting the performance of composite materials, complex processes and equipment, and uneven material density, and achieve high-temperature mechanical and tribological properties Effects of improvement, cost saving, and high thermal conductivity
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Embodiment 1
[0043] First, weigh 5g of boron nitride powder with a median particle size of 0.5μm, 14.4g of pure titanium powder with a median particle size of 40μm, and 14g of pure copper powder with a median particle size of 40μm, add 40g of absolute ethanol, and roll ball mill for 3 Hours, a uniform and stable slurry was obtained; then dried at 50-80°C for 2 hours, and sieved to obtain a mixture powder; the mixture powder was placed in a graphite crucible and sintered in a self-propagating sintering furnace to obtain the desired Copper-based composite powder.
[0044] The copper-based composite powder obtained in this embodiment, the powder morphology is shown in figure 1 shown, phase composition see figure 2 shown. From figure 1 It can be seen that the particle size range of the prepared composite powder is 10-50 μm, which can be judged as the structure formed by the reinforcement phase ceramic particles attached to the copper particles. From figure 2 It can be seen that the phas...
Embodiment 2
[0046] First weigh 6g of boron nitride powder with a median particle size of 0.5μm, 15g of pure titanium powder with a median particle size of 40μm, and 9g of pure copper powder with a median particle size of 40μm, add 40g of absolute ethanol, and roll ball mill for 3 hours , to obtain a uniform and stable slurry; then dry at 50-80°C for 2 hours, and sieve to obtain the mixture powder; place the mixture powder in a graphite crucible and sinter it in a self-propagating sintering furnace to obtain the required copper base composite powder.
[0047] The copper-based composite powder obtained in this embodiment, the powder morphology is shown in image 3 shown, phase composition see Figure 4 shown. From image 3 It can be seen that there are fine particles attached to the surface of the product particles, and the particle size is submicron level. It can be judged that the attached matter is excessive unreacted BN particles. From Figure 4 It can be seen that the phase compos...
Embodiment 3
[0049] First weigh 7.5g of boron nitride powder with a median particle size of 0.5μm, 14.4g of pure titanium powder with a median particle size of 40μm, and 9.4g of pure copper powder with a median particle size of 40μm, add 40g of absolute ethanol, and roll Ball mill for 3 hours to obtain a uniform and stable slurry; then dry at 50-80°C for 2 hours and sieve to obtain the mixture powder; put the mixture powder in a graphite crucible and sinter in a self-propagating sintering furnace to obtain Required copper-based composite powder.
[0050] The copper-based composite powder obtained in this embodiment, the powder morphology is shown in Figure 5 As shown, it can be seen from the figure that the surface of the composite powder particles is covered by a large number of submicron fine particles. From the particle size, the submicron particles are BN. See you in phase Figure 6 As shown, it can be seen from the figure that the phase composition of the composite powder includes ...
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Abstract
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