A kind of light-weight, heat-resistant and high-stiffness multi-element reinforced aluminum matrix composite material and preparation method thereof
An aluminum-based composite material and composite material technology, applied in the field of lightweight heat-resistant, high-rigidity multi-component reinforced aluminum-based composite materials and its preparation, can solve the problems that aluminum-based composite materials are difficult to meet application requirements, and achieve improved wetting and interface Combined effect, excellent comprehensive performance, good effect of enhancing effect
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[0042] The invention provides a light-weight, heat-resistant and high-rigidity multi-component reinforced aluminum-based composite material and a preparation method thereof. w and TiB 2 The three kinds of reinforcements are mixed to strengthen the aluminum matrix composite material, and finally a lightweight, heat-resistant and high-stiffness aluminum matrix composite material with excellent comprehensive properties can be obtained, and its efficient preparation can be realized.
[0043] The volume fractions of the three reinforcements in the aluminum matrix composite are: 5%-10% CNTs, 5%-15% SiC w and 2% to 5% TiB 2 .
[0044] Preferably, the CNTs are carboxylated multi-walled carbon nanotubes, with a diameter distribution range of 30-50 nm and a length of less than 10 μm.
[0045] Preferably, SiC w It is a β-type silicon carbide whisker with a diameter distribution range of 0.1-2.5 μm and a length distribution range of 10-50 μm.
[0046] Preferably, the aluminum alloy i...
specific Embodiment approach 1
[0081] 1. CNTs and SiC w Pretreatment: Weigh CNTs with a volume fraction of 10% into a glass beaker, pour in an appropriate amount of distilled water to mix, and then magnetically stir the mixture for 20h, and put the beaker into an ultrasonic cleaner every 30min for ultrasonic dispersion treatment for 5min ;
[0082] Weigh out SiC with a volume fraction of 15% w Put it into a plastic beaker, pour 5wt.% hydrofluoric acid solution, soak it and conduct magnetic stirring for 24h, then put the SiC w The mixed solution with hydrofluoric acid was allowed to stand, the supernatant was poured out, an appropriate amount of distilled water was added for dilution, and the pH value of the mixed solution was repeated several times until the pH value of the mixed solution was neutral.
[0083] 2. CNTs·SiC w Hybrid preform preparation: the pretreated CNTs and SiC in step 1 w Mixed in the water environment, put it into an ultrasonic cleaner for ultrasonic treatment for 20min, and made a r...
specific Embodiment approach 2
[0093] 1. CNTs and SiC w Pretreatment: Weigh CNTs with a volume fraction of 10% into a glass beaker, pour in an appropriate amount of distilled water and mix, then magnetically stir the mixture for 20h, and put the beaker into an ultrasonic cleaner every 30min for ultrasonic dispersion treatment for 5min ;
[0094] Weigh out SiC with a volume fraction of 15% w Put it into a plastic beaker, pour 5wt.% hydrofluoric acid solution, soak it and conduct magnetic stirring for 24h, then put the SiC w The mixed solution with hydrofluoric acid was allowed to stand, the supernatant was poured out, an appropriate amount of distilled water was added for dilution, and the pH value of the mixed solution was repeated several times until the pH value of the mixed solution was neutral.
[0095] 2. CNTs·SiC w Hybrid preform preparation: the pretreated CNTs and SiC in step 1 w Mixed in the water environment, put it into an ultrasonic cleaner for ultrasonic treatment for 20min, and made a rein...
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