Light heat-resistant high-rigidity multi-element reinforced aluminum matrix composite and preparation method thereof
An aluminum-based composite material and a composite material technology are applied in the field of light-weight, heat-resistant, high-stiffness multi-component reinforced aluminum-based composite materials and their preparation, which can solve the problems that aluminum-based composite materials are difficult to meet application requirements, and achieve improved wetting and interface. Combined effect, low density, the effect of improving comprehensive mechanical properties
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[0042] The invention provides a light-weight, heat-resistant, high-rigidity multi-component reinforced aluminum matrix composite material and a preparation method thereof, using CNTs, SiC w and TiB 2 The three reinforcements are mixed to strengthen the aluminum matrix composite material, and finally a light-weight heat-resistant high-rigidity aluminum matrix composite material with excellent comprehensive performance can be obtained, and its efficient preparation can be realized.
[0043] The volume fractions of the three reinforcements in aluminum matrix composites are: 5% to 10% of CNTs, 5% to 15% of 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 aluminu...
specific Embodiment approach 1
[0082] 1. CNTs and SiC w Pretreatment: Weigh CNTs with a volume fraction of 10% into a glass beaker, pour an appropriate amount of distilled water to mix, then magnetically stir the mixture for 20 hours, and put the beaker into an ultrasonic cleaner for ultrasonic dispersion treatment for 5 minutes every 30 minutes ;
[0083] Weigh SiC with a volume fraction of 15% w Put it into a plastic beaker, pour 5wt.% hydrofluoric acid solution, soak and perform magnetic stirring for 24h, and then SiC w Let the mixed solution with hydrofluoric acid stand still, pour off the supernatant, add an appropriate amount of distilled water to dilute, repeat several times until the pH value of the mixed solution is neutral.
[0084] 2. CNTs SiC w Preparation of hybrid preforms: the pretreated CNTs and SiC in step 1 w Mix in the water environment, put it into an ultrasonic cleaning device for ultrasonic treatment for 20 minutes, and make a mixed liquid for enhancing body;
[0085] Add an organ...
specific Embodiment approach 2
[0095] 1. CNTs and SiC w Pretreatment: Weigh CNTs with a volume fraction of 10% into a glass beaker, pour an appropriate amount of distilled water to mix, then magnetically stir the mixture for 20 hours, and put the beaker into an ultrasonic cleaner for ultrasonic dispersion treatment for 5 minutes every 30 minutes ;
[0096] Weigh SiC with a volume fraction of 15% w Put it into a plastic beaker, pour 5wt.% hydrofluoric acid solution, soak and perform magnetic stirring for 24h, and then SiC w Let the mixed solution with hydrofluoric acid stand still, pour off the supernatant, add an appropriate amount of distilled water to dilute, repeat several times until the pH value of the mixed solution is neutral.
[0097] 2. CNTs SiC w Preparation of hybrid preforms: the pretreated CNTs and SiC in step 1 w Mix in the water environment, put it into an ultrasonic cleaning device for ultrasonic treatment for 20 minutes, and make a mixed liquid for enhancing body;
[0098] Add an organ...
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