A kind of preparation method of HF-TA-C reinforced C/SIC ceramic matrix composite
A composite material, hf-ta-c technology, applied in the field of preparation of ultra-high temperature ceramic matrix composite materials, can solve the problems of performance impact, accelerated ablation speed, and many pores, so as to improve ablation resistance and low porosity Effect
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[0022] The invention provides a method for preparing a Hf-Ta-C reinforced C / SiC ceramic matrix composite material, the preparation method comprising the following steps:
[0023] (1) Provide carbon / carbon matrix;
[0024] (2) using a silicon alloy as a reactant, the carbon / carbon matrix is made into a C / SiC ceramic matrix composite material by a reaction infiltration method;
[0025] (3) Using the hafnium-tantalum precursor solution as a reactant, reacting with the C / SiC ceramic matrix composite material by dipping and cracking method, to prepare the Hf-Ta-C reinforced C / SiC ceramic matrix composite material.
[0026] According to some preferred embodiments, in step (1), the carbon / carbon matrix is a carbon fiber reinforced carbon matrix composite material prepared by using a carbon fiber preform by chemical vapor deposition or other densification methods;
[0027] Preferably, the carbon fiber reinforced carbon matrix has a density of 1.0 to 1.4 g / cm 3 ;Limited density i...
Embodiment 1
[0062] (1) Provide carbon / carbon matrix: provide a density of 1.2g / cm 3 The carbon / carbon matrix is prepared by depositing the carbon matrix on the needle-punched carbon fiber prefabricated body by chemical vapor deposition.
[0063] (2) Reaction infiltration treatment: the carbon / carbon matrix is vertically placed in a graphite crucible, and mixed with silicon alloy powder according to a mass ratio of 1:3, and the silicon alloy powder is tiled in the crucible, and the tiled area is 100cm 2 , the height of the silicon alloy powder is 1 / 6 of the carbon / carbon matrix, the particle size of the silicon alloy powder is 3 μm, and the mass fraction of silicon is 99%. The crucible is placed in a high-temperature furnace body, vacuumed, and argon gas is introduced, with a flow rate of 1000 sccm, and the temperature is raised to 1600 °C at a heating rate of 10 °C / min, kept for 120 minutes, and then cooled to at a cooling rate of 10 °C / min. 50°C, stop feeding the inert gas, and ret...
Embodiment 2
[0072] (1) Provide carbon / carbon matrix: provide a density of 1.3g / cm 3 The carbon / carbon matrix is prepared by depositing the carbon matrix on the needle-punched carbon fiber prefabricated body by chemical vapor deposition.
[0073] (2) Reaction infiltration treatment: the carbon / carbon matrix is vertically placed in a graphite crucible, and mixed with silicon alloy powder according to a mass ratio of 1:3, and the silicon alloy powder is tiled in the crucible, and the tiled area is 100cm 2 , the height of the silicon alloy powder is 1 / 4 of the carbon / carbon matrix, the particle size of the silicon alloy powder is 3 μm, and the mass fraction of silicon is 99%. Place the above crucible in a high-temperature furnace, vacuumize it, feed argon gas, the flow rate is 1000sccm, raise the temperature to 1600°C at a heating rate of 10°C / min, keep it warm for 120 minutes, and then cool it down to 50°C at a cooling rate of 10°C / min. ℃, stop introducing the inert gas, and return to ...
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