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Layered ablation-resistant ultrahigh-temperature ceramic material and preparation method thereof
The invention discloses a layered ablation-resistant ultrahigh-temperature ceramic material and a preparation method thereof. The layered ablation-resistant ultrahigh-temperature ceramic material is divided into a high-temperature-resistant outer layer, an anti-oxidation middle layer and a high-strength inner layer, the components of the high-temperature-resistant outer layer comprise 30-80 vol.% of HfC, 10-60 vol.% of ZrC and 1-10 vol.% of SiCf, the components of the antioxidant middle layer comprise 10-80 vol.% of HfB2, 10-80 vol.% of ZrB2 and 10-30 vol.% of SiC, and the components of the high-strength inner layer comprise 70-90 vol.% of ZrB2 and 10-30 vol.% of SiCf. The use temperature of the ultra-high-temperature ceramic material is greatly increased, the ultra-high-temperature use requirement of 2500-3000 DEG C can be met in the atmospheric environment, the blank that no material is available at the temperature is filled, and the obdurability and ablation resistance of the ceramic material are remarkably improved. The high-temperature-resistant outer layer and the high-strength inner layer double SiCf fiber reinforced layer are combined with the transition layer in a stress relaxation manner, so that crack propagation is inhibited, and the layered ablation-resistant ultrahigh-temperature ceramic material has high strength and toughness.
本发明公开了一种层状耐烧蚀超高温陶瓷材料及其制备方法，层状耐烧蚀超高温陶瓷材料分为耐高温外层、抗氧化中层和高强度内层；耐高温外层成分为30～80vol.％HfC+10～60vol.％ZrC+1～10vol.％SiCf，抗氧化中层成分为10～80vol.％HfB2+10～80vol.％ZrB2+10～30vol.％SiC，高强度内层成分为70～90vol.％ZrB2+10～30vol.％SiCf。本发明大幅提高超高温陶瓷材料的使用温度，大气环境下可满足2500℃～3000℃超高温使用要求，填补该温度下无材可用的空白，且本发明的陶瓷材料的强韧性及抗烧蚀性能均得到显著提高。耐高温外层与高强度内层双SiCf纤维增强层与过渡层应力松弛结合，抑制了裂纹扩展，使层状耐烧蚀超高温陶瓷材料具有高强韧性。
Layered ablation-resistant ultrahigh-temperature ceramic material and preparation method thereof
The invention discloses a layered ablation-resistant ultrahigh-temperature ceramic material and a preparation method thereof. The layered ablation-resistant ultrahigh-temperature ceramic material is divided into a high-temperature-resistant outer layer, an anti-oxidation middle layer and a high-strength inner layer, the components of the high-temperature-resistant outer layer comprise 30-80 vol.% of HfC, 10-60 vol.% of ZrC and 1-10 vol.% of SiCf, the components of the antioxidant middle layer comprise 10-80 vol.% of HfB2, 10-80 vol.% of ZrB2 and 10-30 vol.% of SiC, and the components of the high-strength inner layer comprise 70-90 vol.% of ZrB2 and 10-30 vol.% of SiCf. The use temperature of the ultra-high-temperature ceramic material is greatly increased, the ultra-high-temperature use requirement of 2500-3000 DEG C can be met in the atmospheric environment, the blank that no material is available at the temperature is filled, and the obdurability and ablation resistance of the ceramic material are remarkably improved. The high-temperature-resistant outer layer and the high-strength inner layer double SiCf fiber reinforced layer are combined with the transition layer in a stress relaxation manner, so that crack propagation is inhibited, and the layered ablation-resistant ultrahigh-temperature ceramic material has high strength and toughness.
本发明公开了一种层状耐烧蚀超高温陶瓷材料及其制备方法，层状耐烧蚀超高温陶瓷材料分为耐高温外层、抗氧化中层和高强度内层；耐高温外层成分为30～80vol.％HfC+10～60vol.％ZrC+1～10vol.％SiCf，抗氧化中层成分为10～80vol.％HfB2+10～80vol.％ZrB2+10～30vol.％SiC，高强度内层成分为70～90vol.％ZrB2+10～30vol.％SiCf。本发明大幅提高超高温陶瓷材料的使用温度，大气环境下可满足2500℃～3000℃超高温使用要求，填补该温度下无材可用的空白，且本发明的陶瓷材料的强韧性及抗烧蚀性能均得到显著提高。耐高温外层与高强度内层双SiCf纤维增强层与过渡层应力松弛结合，抑制了裂纹扩展，使层状耐烧蚀超高温陶瓷材料具有高强韧性。
Layered ablation-resistant ultrahigh-temperature ceramic material and preparation method thereof
一种层状耐烧蚀超高温陶瓷材料及其制备方法
MAO XIAODONG (Autor:in) / ZHEN QIANG (Autor:in) / LI RONG (Autor:in) / ZHENG FENG (Autor:in) / BU NAIJING (Autor:in) / HU ZHIJIE (Autor:in)
09.04.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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