A preparation method of oxide fiber/oxide ceramic matrix composite material containing anti-oxidation weakening interface
A technology of oxide ceramics and composite materials, applied in the field of ceramic matrix composite material preparation, can solve the problems of easy oxidation and failure of the interface phase, and achieve excellent high temperature oxidation resistance, low preparation cost, and excellent sheet structure stability. Effect
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example 1
[0032] A kind of Nextel720 / plate-Al containing anti-oxidation weakening interface 2 o 3 / Al 2 o 3 The preparation method of ceramic matrix composite material, concrete steps are as follows:
[0033] 1) Nextel720 fiber preform molding and pretreatment
[0034] Prefabricate Nextel720 fiber by using the existing molding method; place the Nextel720 fiber preform in an air atmosphere at 600°C for 2 hours for pretreatment;
[0035] 2) Preparation of nanosheet alumina fiber interface
[0036] 2.1) Configure Al with a concentration of 1mol / L 2 (SO 4 ) 3 18H 2O solution, dropwise add ammonia water with a mass concentration of 25%, and control the pH within the range of 7 to 10 to obtain a suspension containing a large amount of floc; place the suspension in an autoclave to make the system fill degree 70 %, after closing the system, place the autoclave in an oven at 200°C for 24 hours; then perform ultrasonic cleaning and vacuum filtration on the suspension several times until ...
example 2
[0064] A kind of Nextel610 / plate-Al containing anti-oxidation weakening interface 2 o 3 / Al 2 o 3 The preparation method of ceramic matrix composite material, concrete steps are as follows:
[0065] 1) Nextel610 fiber preform molding and pretreatment
[0066] Prefabricate Nextel610 fiber by using the existing molding method; place the Nextel610 fiber preform in an air atmosphere at 500°C for 2 hours for pretreatment;
[0067] 2) Preparation of nanosheet alumina fiber interface
[0068] 2.1) Configure AlCl with a concentration of 0.3mol / L 3 ·6H 2 O solution, NaOH with a concentration of 1mol / L was added dropwise to it, and the pH was controlled within the range of 7 to 10 to obtain a suspension containing a large amount of floc; the suspension was placed in an autoclave to make the system filling degree 70 %, after closing the system, place the autoclave in an oven at 200°C for 24 hours; then perform ultrasonic cleaning and vacuum filtration on the suspension several tim...
Embodiment 3
[0076] A kind of Nextel720 / plate-Al containing anti-oxidation weakening interface 2 o 3 The preparation method of / mullite ceramic matrix composite material, concrete steps are as follows:
[0077] 1) Nextel720 fiber preform molding and pretreatment
[0078] Prefabricate Nextel720 fiber by using the existing molding method; place the Nextel720 fiber preform in an air atmosphere at 550°C for 2 hours for pretreatment;
[0079]2) Preparation of nanosheet alumina fiber interface
[0080] 2.1) Configure Al with a concentration of 1mol / L 2 (SO 4 ) 3 18H 2 O solution, dropwise add ammonia water with a mass concentration of 25%, and control the pH within the range of 7 to 10 to obtain a suspension containing a large amount of floc; place the suspension in an autoclave to make the system fill degree 70 %, after closing the system, place the autoclave in an oven at 200°C for 24 hours; then perform ultrasonic cleaning and vacuum filtration on the suspension several times until no p...
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