A kind of mosic2 base cermet material and preparation method thereof
A technology of ceramic material and base metal, applied in the field of MoSiC2-based cermet material and its preparation, can solve the problems of no report on the research of base cermet material, high ceramic phase formation temperature, narrow phase formation temperature range, etc., and achieves good application. Prospect, dense structure, high material utilization effect
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[0021] MoSiC provided by the present invention 2 The preparation method of base cermet material specifically comprises the following steps:
[0022] 1) Mo powder, Si powder, and graphite powder with a purity of not less than 99.9% are selected as the main raw materials, and the particle size of Mo powder and graphite powder is required to be ≤20 μm, and the particle size of Si powder is ≤50 μm. According to the mass ratio Mo: Si: C = (0.83 ~ 0.76): (0.12 ~ 0.17): (0.05 ~ 0.07) ingredients, put Mo powder, Si powder and graphite powder into a high-energy ball mill tank, fill it with argon gas Mechanical alloying, the ball milling time is 15-40h, and the mixed powder is obtained; the ball-to-material ratio during ball milling is (5-10):1, and the ball milling speed is 250-400r / min;
[0023] 2) Take out the mixed powder and put it into a graphite mold for hot-press sintering, raise the temperature from room temperature to the sintering temperature of 1400-1750°C at a heating rate...
Embodiment 1
[0026] 1) Mo powder, Si powder, and graphite powder with a purity of not less than 99.9% are selected as the main raw materials, and the particle size of Mo powder and graphite powder is required to be ≤20 μm, and the particle size of Si powder is ≤50 μm. According to the mass ratio Mo:Si:C=0.83:0.12:0.05 ingredients, put Mo powder, Si powder and graphite powder into the high-energy ball mill tank, fill it with argon gas and carry out mechanical alloying, the ball mill time is 25h, and the mixed powder is obtained body; the ball-to-material ratio during ball milling is 10:1, and the rotational speed is 300r / min.
[0027] 2) Take out the mixed powder and put it into a graphite mold for hot-press sintering, heat up from room temperature to a sintering temperature of 1550°C at a heating rate of 10°C / min, keep sintering at the sintering temperature for 60min, and vacuum during the sintering process≤10 -2 Pa, the pressure is 40MPa, after the sintering is completed, it is cooled wit...
Embodiment 2
[0030] 1) Mo powder, Si powder, and graphite powder with a purity of not less than 99.9% are selected as the main raw materials, and the particle size of Mo powder and graphite powder is required to be ≤20 μm, and the particle size of Si powder is ≤50 μm. According to the mass ratio of Mo:Si:C=0.76:0.17:0.07, put Mo powder, Si powder and graphite powder into a high-energy ball mill tank, fill it with argon gas and carry out mechanical alloying, and the ball mill time is 25h to obtain a mixed powder body; the ball-to-material ratio during ball milling is 5:1, and the rotational speed is 250r / min.
[0031] 2) Take out the mixed powder and put it into a graphite mold for hot-press sintering, heat up from room temperature to 1750°C sintering temperature at a heating rate of 10°C / min, keep sintering at the sintering temperature for 60min, and vacuum degree ≤10 during the sintering process -2 Pa, the pressure is 50MPa, after the sintering is completed, it is cooled with the furnace,...
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