Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Boron carbide ceramic as well as preparation method and application thereof
The invention belongs to the technical field of structural composite materials, and provides boron carbide ceramic as well as a preparation method and application thereof. According to the boron carbide ceramic disclosed by the invention, the double-surface-modified continuous silicon carbide fiber fabric is used as a reinforcing body, and a reinforcing array is formed in a ceramic matrix; meanwhile, a titanium source on the surface of the continuous silicon carbide fiber fabric is firstly subjected to high-temperature pyrolysis, then is reduced into metal titanium through sintering under the assistance of an organic carbon source, and then reacts with the silicon carbide fiber and the boron carbide matrix to form coupling and bridging, so that the interface bonding strength between the continuous silicon carbide fiber fabric and the boron carbide matrix is improved; and in addition, the titanium source on the surface of the continuous silicon carbide fiber fabric can be converted into tough phases such as titanium carbide and titanium boride after being sintered, and a tough array is formed in the boron carbide matrix, so that the toughening effect is achieved. The embodiment shows that the bending strength and the fracture toughness of the obtained boron carbide ceramic are obviously improved; and when being used for body armor and bulletproof armor, the boron carbide ceramic is better in anti-multi-bullet capability.
本发明属于结构复合材料技术领域，提供了一种碳化硼陶瓷及其制备方法和应用。本发明的碳化硼陶瓷使用双重表面改性的连续碳化硅纤维织物作为增强体，于陶瓷基体中构成了增强阵列；同时，连续碳化硅纤维织物表面的钛源先高温裂解，然后通过烧结在有机碳源的辅助下还原成金属钛，之后与碳化硅纤维和碳化硼基体分别反应构成偶联和桥接，提高了连续碳化硅纤维织物和碳化硼基体之间的界面结合强度；另外，连续碳化硅纤维织物表面的钛源在烧结后会转化为碳化钛和硼化钛等韧性相，在碳化硼基体中构成了韧性阵列，起到增韧效果。实施例表明，所得碳化硼陶瓷的抗弯强度和断裂韧性显著提高；用于防弹衣和防弹装甲时，抗多发弹能力较好。
Boron carbide ceramic as well as preparation method and application thereof
The invention belongs to the technical field of structural composite materials, and provides boron carbide ceramic as well as a preparation method and application thereof. According to the boron carbide ceramic disclosed by the invention, the double-surface-modified continuous silicon carbide fiber fabric is used as a reinforcing body, and a reinforcing array is formed in a ceramic matrix; meanwhile, a titanium source on the surface of the continuous silicon carbide fiber fabric is firstly subjected to high-temperature pyrolysis, then is reduced into metal titanium through sintering under the assistance of an organic carbon source, and then reacts with the silicon carbide fiber and the boron carbide matrix to form coupling and bridging, so that the interface bonding strength between the continuous silicon carbide fiber fabric and the boron carbide matrix is improved; and in addition, the titanium source on the surface of the continuous silicon carbide fiber fabric can be converted into tough phases such as titanium carbide and titanium boride after being sintered, and a tough array is formed in the boron carbide matrix, so that the toughening effect is achieved. The embodiment shows that the bending strength and the fracture toughness of the obtained boron carbide ceramic are obviously improved; and when being used for body armor and bulletproof armor, the boron carbide ceramic is better in anti-multi-bullet capability.
本发明属于结构复合材料技术领域，提供了一种碳化硼陶瓷及其制备方法和应用。本发明的碳化硼陶瓷使用双重表面改性的连续碳化硅纤维织物作为增强体，于陶瓷基体中构成了增强阵列；同时，连续碳化硅纤维织物表面的钛源先高温裂解，然后通过烧结在有机碳源的辅助下还原成金属钛，之后与碳化硅纤维和碳化硼基体分别反应构成偶联和桥接，提高了连续碳化硅纤维织物和碳化硼基体之间的界面结合强度；另外，连续碳化硅纤维织物表面的钛源在烧结后会转化为碳化钛和硼化钛等韧性相，在碳化硼基体中构成了韧性阵列，起到增韧效果。实施例表明，所得碳化硼陶瓷的抗弯强度和断裂韧性显著提高；用于防弹衣和防弹装甲时，抗多发弹能力较好。
Boron carbide ceramic as well as preparation method and application thereof
一种碳化硼陶瓷及其制备方法和应用
LI YADONG (Autor:in) / LIU HUAN (Autor:in) / ZHENG ZHILI (Autor:in) / PENG BIN (Autor:in) / YUAN LINJUN (Autor:in)
07.01.2022
Patent
Elektronische Ressource
Chinesisch
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