Preparation method of Ta2AlC-Ta4AlC3 composite material

[0018] Embodiment 1: a kind of Ta 2 AlC-Ta 4 AlC 3 The preparation method of composite material comprises the following steps:

[0019] (1) Using tantalum powder, aluminum powder and tantalum carbide powder as raw materials, according to the molar ratio of Ta:Al:TaC =1:1.4:1 and adding tantalum carbide powder with a mass fraction of 10%;

[0020] (2) Put the above ingredients into a ball mill tank, and wet mix them on a planetary ball mill for 15 hours;

[0021] (3) Adopt rotary evaporator to dry mixed material, then put into graphite abrasive tool and carry out pre-compression, pre-compression pressure is 20Mpa;

[0022] (4) The mold was placed in a spark plasma sintering furnace, heated to 1500°C at a heating rate of 200°C / min under the protection of Ar gas, and kept at a pressure of 500MPa for 5min. After the heat preservation is completed, cool down to room temperature with the furnace to obtain Ta 2 AlC-Ta 4 AlC 3 Composite bulk ceramics.

[0023] Embodiment 2: a kind of Ta 2 AlC-Ta 4 AlC 3 The preparation method of composite material comprises the following steps:

[0024] (1) Using tantalum powder, aluminum powder and tantalum carbide powder as raw materials, according to the molar ratio of Ta:Al:TaC =1:1.4:1 and adding tantalum carbide powder with a mass fraction of 20%;

[0025] (2) Put the above ingredients into a ball mill tank, and wet mix them on a planetary ball mill for 15 hours;

[0026] (3) Adopt rotary evaporator to dry the mixed material, then put it into the graphite abrasive tool and carry out pre-compression, the pre-compression pressure is 20Mpa;

[0027] (4) The mold was placed in a spark plasma sintering furnace, heated to 1500°C at a heating rate of 200°C / min under the protection of Ar gas, and kept at a pressure of 500MPa for 5min. After the heat preservation is completed, cool down to room temperature with the furnace to obtain Ta 2 AlC-Ta 4 AlC 3 Composite bulk ceramics.

[0028] Embodiment 3: a kind of Ta 2 AlC-Ta 4 AlC 3 The preparation method of composite material comprises the following steps:

[0029] (1) Using tantalum powder, aluminum powder and tantalum carbide powder as raw materials, according to the molar ratio of Ta:Al:TaC =1:1.4:1 and adding tantalum carbide powder with a mass fraction of 30%;

[0030] (2) Put the above-mentioned ingredients into a ball mill tank, and wet mix them on a planetary ball mill for 15 hours;

[0031] (3) Adopt rotary evaporator to dry the mixed material, then put it into the graphite abrasive tool and carry out pre-compression, the pre-compression pressure is 20Mpa;

[0032](4) The mold was placed in a spark plasma sintering furnace, heated to 1500°C at a heating rate of 200°C / min under the protection of Ar gas, and kept at a pressure of 500MPa for 5min. After the heat preservation is completed, cool down to room temperature with the furnace to obtain Ta 2 AlC-Ta 4 AlC 3 Composite bulk ceramics.

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