Multi-component composite zirconium boride-based ceramic material and preparation method thereof
A multi-component composite and ceramic material technology, applied in the field of ceramic materials, can solve problems such as ZrB2, and achieve the effects of low cost, excellent performance and simple process
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Embodiment 1
[0024] According to the molar ratio of zirconium hydride: boron carbide: silicon: aluminum: graphite = 8.4: 4.0: 4.2: 0.8: 1.2, weigh the raw material zirconium hydride powder (purity ≥ 99.9%, particle size ≤ 37 microns), boron carbide powder (purity ≥ 99 %, particle size ≤ 10 microns), silicon powder (purity ≥ 99.9%, particle size ≤ 48 microns), aluminum powder (purity ≥ 99.9%, particle size ≤ 48 microns) and graphite powder (purity ≥ 99.9%, particle size ≤ 12 microns) , placed in a ball mill and mixed evenly, then placed in a graphite mold sprayed with boron nitride on the surface, cold-pressed for molding, hot-pressed and sintered in an argon atmosphere, and heated to 1750 °C at a rate of 15 °C / min to reach the sintering temperature point Finally, the pressure was gradually increased to 30MPa, kept for 1.5h, then cooled at a rate of 15°C / min, annealed at 1450°C and kept at a pressure of 30MPa for 40min, and finally turned off and cooled in the furnace to obtain the composite...
Embodiment 2
[0026] According to the molar ratio of zirconium hydride: boron carbide: silicon: aluminum: graphite = 8.0: 3.6: 3.8: 1.4: 2.7, weigh the raw material zirconium hydride powder (purity ≥ 99.9%, particle size ≤ 37 microns), boron carbide powder (purity ≥ 99 %, particle size ≤ 10 microns), silicon powder (purity ≥ 99.9%, particle size ≤ 48 microns), aluminum powder (purity ≥ 99.9%, particle size ≤ 48 microns) and graphite powder (purity ≥ 99.9%, particle size ≤ 12 microns) , placed in a ball mill and mixed evenly, then placed in a graphite mold sprayed with boron nitride on the surface, cold-pressed for molding, hot-pressed and sintered in an argon atmosphere, and heated to 1850°C at a rate of 20°C / min. After reaching the sintering temperature , the pressure was gradually increased to 25MPa, and kept for 1.2h, then cooled at a rate of 20°C / min, annealed at 1550°C, 25MPa pressure and kept for 30min, and finally turned off the power and cooled with the furnace. Obtain the composite...
Embodiment 3
[0028]According to the molar ratio of zirconium hydride: boron carbide: silicon: aluminum: graphite = 7.6: 3.2: 3.4: 2.0: 4.2, weigh the raw material zirconium hydride powder (purity ≥ 99.9%, particle size ≤ 37 microns), boron carbide powder (purity ≥ 99 %, particle size ≤ 10 microns), silicon powder (purity ≥ 99.9%, particle size ≤ 48 microns), aluminum powder (purity ≥ 99.9%, particle size ≤ 48 microns) and graphite powder (purity ≥ 99.9%, particle size ≤ 12 microns) , placed in a ball mill and mixed evenly, then placed in a graphite mold sprayed with boron nitride on the surface, cold-pressed for molding, hot-pressed and sintered in an argon atmosphere, and heated to 1950°C at a rate of 30°C / min. After reaching the sintering temperature , the pressure was gradually increased to 20MPa, kept for 1h, then cooled at a rate of 30°C / min, annealed at 1650°C, 20MPa pressure and kept for 20min, and finally turned off the power and cooled with the furnace. Obtain the composite materi...
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