Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
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Novel high-strength oxide ceramic-based composite material and preparation method thereof
The invention belongs to the field of oxide ceramic-based composite materials, and particularly provides a novel high-strength oxide ceramic-based composite material and a preparation method thereof. The novel high-strength oxide ceramic-based composite material is prepared from a Mullite-Al2O3 matrix, an alumina fiber preform and a LaPO4 interface phase positioned between the matrix and the fiber preform. The preparation method comprises the following steps: weaving alumina fibers into a preform, preparing a LaPO4 interface by a sol-gel method, and preparing a Mullite-Al2O3 matrix by a chemical vapor infiltration method to obtain the composite material. The invention provides an oxide ceramic matrix composite material, which has a proper weak bonding interface with enough damage tolerance between fiber and a matrix and can be used for preparing a high-density matrix at a low temperature, so that the fracture work and fracture strain of the composite material can be improved while the fiber damage is reduced, and the requirements of the aerospace field on high-performance materials can be met.
本发明属于氧化物陶瓷基复合材料领域，具体提供一种新型高强度氧化物陶瓷基复合材料及其制备方法。本发明的一种新型高强度氧化物陶瓷基复合材料，包括Mullite‑Al2O3基体、氧化铝纤维预制体以及处于基体和纤维预制体之间的LaPO4界面相组成。制备方法包括以下步骤：将氧化铝纤维编织成预制体，经溶胶‑凝胶法制备LaPO4界面后，以化学气相渗透法制备Mullite‑Al2O3基体得到复合材料。本发明提供一种可在纤维与基体间具有足够损伤容限的适当弱结合界面且以低温制备高致密度基体的氧化物陶瓷基复合材料，在减少纤维损伤的同时还能提高复合材料的断裂功和断裂应变，能满足航空航天领域对高性能材料的需求。
Novel high-strength oxide ceramic-based composite material and preparation method thereof
The invention belongs to the field of oxide ceramic-based composite materials, and particularly provides a novel high-strength oxide ceramic-based composite material and a preparation method thereof. The novel high-strength oxide ceramic-based composite material is prepared from a Mullite-Al2O3 matrix, an alumina fiber preform and a LaPO4 interface phase positioned between the matrix and the fiber preform. The preparation method comprises the following steps: weaving alumina fibers into a preform, preparing a LaPO4 interface by a sol-gel method, and preparing a Mullite-Al2O3 matrix by a chemical vapor infiltration method to obtain the composite material. The invention provides an oxide ceramic matrix composite material, which has a proper weak bonding interface with enough damage tolerance between fiber and a matrix and can be used for preparing a high-density matrix at a low temperature, so that the fracture work and fracture strain of the composite material can be improved while the fiber damage is reduced, and the requirements of the aerospace field on high-performance materials can be met.
本发明属于氧化物陶瓷基复合材料领域，具体提供一种新型高强度氧化物陶瓷基复合材料及其制备方法。本发明的一种新型高强度氧化物陶瓷基复合材料，包括Mullite‑Al2O3基体、氧化铝纤维预制体以及处于基体和纤维预制体之间的LaPO4界面相组成。制备方法包括以下步骤：将氧化铝纤维编织成预制体，经溶胶‑凝胶法制备LaPO4界面后，以化学气相渗透法制备Mullite‑Al2O3基体得到复合材料。本发明提供一种可在纤维与基体间具有足够损伤容限的适当弱结合界面且以低温制备高致密度基体的氧化物陶瓷基复合材料，在减少纤维损伤的同时还能提高复合材料的断裂功和断裂应变，能满足航空航天领域对高性能材料的需求。
Novel high-strength oxide ceramic-based composite material and preparation method thereof
一种新型高强度氧化物陶瓷基复合材料及其制备方法
YANG LIXIA (Autor:in) / ZHONG BOFENG (Autor:in) / ZHANG JUNXIONG (Autor:in) / CHEN ZHAOFENG (Autor:in) / LIAO JIAHAO (Autor:in) / KOU ZONGDE (Autor:in)
18.01.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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