A kind of nano-alumina reinforced copper-based composite material and preparation method thereof
A copper-based composite material and nano-alumina technology, which is applied in the field of copper-based composite material preparation, can solve the problems of easy damage to the matrix integrity, non-wetting of the copper matrix, and complicated powder making process, so as to achieve high density and improve the interface Combination, the effect of simple milling process
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[0034] The preparation method of the nano-alumina reinforced copper-based composite material is as follows: figure 1 Shown:
[0035] First utilize Sol-Gel method, by reaction formula (1-1), (1-2) according to Al 2 o 3 Content 0.2-2.0% Weigh an appropriate amount of Al(NO 3 ) 3 9H 2 O is the precursor, the preparation of Al(NO 3 ) 3 solution; then utilize dilute nitric acid 0.1mol / L to dissolve 0.1-0.6% La 2 o 3 And with the prepared Al(NO 3 ) 3 The solution is mixed. Add 0.2mol / L NH2 dropwise to the mixed solution under stirring condition 3 ·H 2 O adjusts PH=9, that is, La(OH) is prepared by Sol-Gel method 3 -Al(OH) 3 Mix the sol, stir for 1 hour, filter and wash the sol until PH = 7, stir and disperse the sol in absolute ethanol for 1 hour, add an appropriate amount of copper powder with a particle size range of 10-50 μm, stir and mix for 1 hour, after 70-80 After drying in a vacuum oven for 8-10 hours at ℃, La(OH) was prepared 3 -Al(OH) 3 Mixed gel-coated co...
Embodiment 1
[0041] First use the Sol-Gel method, by Al 2 o 3 Content 0.2% Weigh an appropriate amount of Al(NO 3 ) 3 9H 2 O is the precursor, the preparation of Al(NO 3 ) 3 solution, and then use dilute nitric acid 0.1mol / L to dissolve 0.1% La 2 o 3 And with the prepared Al(NO 3 ) 3 The solution is mixed. Add 0.2mol / L NH2 dropwise to the mixed solution under stirring condition 3 ·H 2 O adjusts PH=9 to prepare La(OH) 3 -Al(OH) 3 Mix the sol, stir for 1 hour, wait for the sol to fully separate out, filter and wash until PH = 7, stir and disperse the sol in absolute ethanol for 1 hour, and add 99.35% of copper powder with a particle size range of 10-50 μm and stir and mix for 1 hour. After 70 After drying in a vacuum oven at ℃ for 10 h, La(OH) was prepared 3 -Al(OH) 3 Mixed gel-coated copper powder composite powder. The composite powder is pre-pressed into a blank in a graphite abrasive tool, and then is subjected to an initial pressure of 0.5MPa, 400°C heat preservation for ...
Embodiment 2
[0044] The preparation method and process of nano-alumina reinforced copper-based composite material are the same as in Example 1, at first utilizing the Sol-Gel method, by Al 2 o 3 Content 1.0% Weigh an appropriate amount of Al(NO 3 ) 3 9H 2 O is the precursor, the preparation of Al(NO 3 ) 3 solution, and then use dilute nitric acid 0.1mol / L to dissolve 0.3% La 2 o 3 And with the prepared Al(NO 3 ) 3 The solution is mixed. Add 0.2mol / L NH2 dropwise to the mixed solution under stirring condition 3 ·H 2 O adjusts PH=9 to prepare La(OH) 3 -Al(OH) 3 Mix the sol, stir for 1 hour, wait for the sol to be fully separated, filter and wash until PH = 7, stir and disperse the sol in absolute ethanol for 1 hour, and add 98.15% of copper powder with a particle size range of 10-50 μm and stir and mix for 1 hour. After 75 After drying in a vacuum oven at ℃ for 9 hours, La(OH) was prepared 3 -Al(OH) 3 Mixed gel-coated copper powder composite powder. The composite powder is pr...
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