Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of ultrahigh-temperature ceramic material with high bending strength and fracture toughness
The invention belongs to the technical field of ultra-high-temperature ceramics, and relates to a preparation method of an ultra-high-temperature ceramic material with high bending strength and fracture toughness, and the preparation method comprises the following steps: ultrasonically mixing silicon carbide fibers and silicon carbide particles, ball-milling with hafnium boride and zirconium boride, drying, and sintering to obtain the ultra-high-temperature ceramic material, wherein the length-diameter ratio of the silicon carbide fiber is not less than 50. Compared with the prior art, the ultrahigh-temperature ceramic prepared by the invention has excellent bending strength and fracture toughness which can reach 612 MPa and 9.21 MPa.m < 1/2 > respectively, and meets the requirements of high mechanical properties of hypersonic aircraft nose cones, rocket nozzles and scramjet engine parts.
本发明属于超高温陶瓷技术领域，涉及一种具有高抗弯强度和断裂韧性的超高温陶瓷材料的制备方法，制备方法包括：将碳化硅纤维与碳化硅颗粒超声混合，再与硼化铪、硼化锆球磨，干燥，烧结，得到超高温陶瓷材料；其中，所述碳化硅纤维的长径比不小于50。与现有技术相比，本发明制备的超高温陶瓷具有优异的抗弯强度和断裂韧性，分别可达到612MPa和9.21MPa·m1/2，满足高超声速飞行器鼻锥、火箭喷嘴以及超燃冲压发动机部件高力学性能的需要。
Preparation method of ultrahigh-temperature ceramic material with high bending strength and fracture toughness
The invention belongs to the technical field of ultra-high-temperature ceramics, and relates to a preparation method of an ultra-high-temperature ceramic material with high bending strength and fracture toughness, and the preparation method comprises the following steps: ultrasonically mixing silicon carbide fibers and silicon carbide particles, ball-milling with hafnium boride and zirconium boride, drying, and sintering to obtain the ultra-high-temperature ceramic material, wherein the length-diameter ratio of the silicon carbide fiber is not less than 50. Compared with the prior art, the ultrahigh-temperature ceramic prepared by the invention has excellent bending strength and fracture toughness which can reach 612 MPa and 9.21 MPa.m < 1/2 > respectively, and meets the requirements of high mechanical properties of hypersonic aircraft nose cones, rocket nozzles and scramjet engine parts.
本发明属于超高温陶瓷技术领域，涉及一种具有高抗弯强度和断裂韧性的超高温陶瓷材料的制备方法，制备方法包括：将碳化硅纤维与碳化硅颗粒超声混合，再与硼化铪、硼化锆球磨，干燥，烧结，得到超高温陶瓷材料；其中，所述碳化硅纤维的长径比不小于50。与现有技术相比，本发明制备的超高温陶瓷具有优异的抗弯强度和断裂韧性，分别可达到612MPa和9.21MPa·m1/2，满足高超声速飞行器鼻锥、火箭喷嘴以及超燃冲压发动机部件高力学性能的需要。
Preparation method of ultrahigh-temperature ceramic material with high bending strength and fracture toughness
具有高抗弯强度和断裂韧性的超高温陶瓷材料的制备方法
ZHEN QIANG (Autor:in) / LI JIAXI (Autor:in) / ZHENG FENG (Autor:in) / MAO XIAODONG (Autor:in) / BU NAIJING (Autor:in)
30.01.2024
Patent
Elektronische Ressource
Chinesisch
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