Preparation method of silicon nitride, silicon carbide combined molybdenum boride foamed ceramics
A technology of dimolybdenum boride and foam ceramics, which is applied in ceramic products, applications, household appliances, etc., can solve the problems of poor thermal shock resistance, inability to meet the needs of continuous casting of large-scale special steel castings, and low service temperature. Excellent thermal shock resistance, light weight, and improved strength
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Embodiment 1
[0010] Will Mo 2 B, silicon micropowder, phenolic resin are the ratio of 40:40:20 with weight ratio and add concentration and be 0.1wt% hydroxypropyl methylcellulose solution 40wt% and evenly mix and make ceramic slurry, then ceramic slurry is impregnated in On polyurethane foam, after drying, heat slowly at 300°C~1450°C for 20 hours in a nitrogen atmosphere, keep at 1450°C for 5 hours, and then hold at 1700°C for 20 minutes in a vacuum or argon atmosphere to make nitrogen Silicon carbide, silicon carbide combined with dimolybdenum boride foam ceramics.
[0011] The purity of the batching raw materials used in the experiment is industrial pure.
Embodiment 2
[0013] Will Mo 2 B, silicon micropowder, phenolic resin are the ratio of 60:25:15 with weight ratio and add concentration and be that 0.2wt% hydroxypropyl methylcellulose solution 50wt% evenly mix and make ceramic slurry, then ceramic slurry is impregnated in On polyurethane foam, after drying, slowly heat up at 300°C~1450°C for 60 hours in a nitrogen atmosphere, keep at 1450°C for 8 hours, and then hold at 1730°C for 70 minutes in a vacuum or argon atmosphere to make nitrogen Silicon carbide, silicon carbide combined with dimolybdenum boride foam ceramics.
[0014] The purity of the batching raw materials used in the experiment is industrial pure.
Embodiment 3
[0016] Will Mo 2 B, silicon micropowder, phenolic resin are the ratio of 88:10:2 with weight ratio and add concentration and be that 0.3wt% hydroxypropyl methylcellulose solution 60wt% evenly mix and make ceramic slurry, then ceramic slurry is impregnated in On polyurethane foam, after drying, slowly heat up at 300°C~1450°C for 100 hours in a nitrogen atmosphere, keep at 1450°C for 10 hours, and then hold at 1750°C for 120 minutes in a vacuum or argon atmosphere to make nitriding Silicon, silicon carbide combined with dimolybdenum boride foam ceramics.
[0017] The purity of the batching raw materials used in the experiment is industrial pure.
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