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Nanometer high-entropy ceramic with high hardness and amorphous-nanocrystalline double-phase structure and preparation method of nanometer high-entropy ceramic
The invention belongs to the technical field of high-entropy ceramics and nano ceramics, and particularly relates to nano high-entropy ceramics with high hardness and an amorphous-nanocrystalline double-phase structure and a preparation method of the nano high-entropy ceramics. The high-entropy ceramic is of an amorphous-nanocrystalline double-phase structure. The nano high-entropy ceramic is composed of entropy-regulated nano-crystalline grains, an amorphous SiO2 matrix and zirconium oxide, wherein the components of the entropy-regulated nano-crystalline grains contain oxides of at least three elements of yttrium, cerium, hafnium, ytterbium and niobium; the entropy-regulated nanocrystals are distributed in an amorphous SiO2 matrix, the amorphous SiO2 matrix is continuously distributed, and the size of the nanocrystals is smaller than or equal to 100 nm. The preparation method comprises the following steps: preparing amorphous high-energy-state ceramic powder by adopting a chemical precipitation method, and then preparing the block nano ceramic by adopting a rapid hot pressing sintering method. The microstructure is reasonable in design, the preparation process is simple and controllable, and the obtained product is excellent in performance and convenient for industrial application.
本发明属于高熵陶瓷和纳米陶瓷技术领域，具体涉及一种硬度高且具有非晶‑纳米晶双相结构的纳米高熵陶瓷及其制备方法。所述高熵陶瓷具有非晶‑纳米晶双相结构；所述纳米高熵陶瓷由熵调控的纳米晶粒、非晶SiO2基质、锆的氧化物构成，所述熵调控的纳米晶粒的成分中含有钇、铈、铪、镱、铌中至少三种的元素的氧化物；所述熵调控的纳米晶粒分布在非晶SiO2基质中，非晶SiO2基质呈连续分布，纳米晶粒尺寸小于等于100nm。其制备方法包括采用化学工沉淀法制备非晶高能态陶瓷粉体，然后用快速热压烧结法制备块体纳米陶瓷。本发明微观结构设计合理，制备工艺简单可控，所得产品性能优良，便于工业化应用。
Nanometer high-entropy ceramic with high hardness and amorphous-nanocrystalline double-phase structure and preparation method of nanometer high-entropy ceramic
The invention belongs to the technical field of high-entropy ceramics and nano ceramics, and particularly relates to nano high-entropy ceramics with high hardness and an amorphous-nanocrystalline double-phase structure and a preparation method of the nano high-entropy ceramics. The high-entropy ceramic is of an amorphous-nanocrystalline double-phase structure. The nano high-entropy ceramic is composed of entropy-regulated nano-crystalline grains, an amorphous SiO2 matrix and zirconium oxide, wherein the components of the entropy-regulated nano-crystalline grains contain oxides of at least three elements of yttrium, cerium, hafnium, ytterbium and niobium; the entropy-regulated nanocrystals are distributed in an amorphous SiO2 matrix, the amorphous SiO2 matrix is continuously distributed, and the size of the nanocrystals is smaller than or equal to 100 nm. The preparation method comprises the following steps: preparing amorphous high-energy-state ceramic powder by adopting a chemical precipitation method, and then preparing the block nano ceramic by adopting a rapid hot pressing sintering method. The microstructure is reasonable in design, the preparation process is simple and controllable, and the obtained product is excellent in performance and convenient for industrial application.
本发明属于高熵陶瓷和纳米陶瓷技术领域，具体涉及一种硬度高且具有非晶‑纳米晶双相结构的纳米高熵陶瓷及其制备方法。所述高熵陶瓷具有非晶‑纳米晶双相结构；所述纳米高熵陶瓷由熵调控的纳米晶粒、非晶SiO2基质、锆的氧化物构成，所述熵调控的纳米晶粒的成分中含有钇、铈、铪、镱、铌中至少三种的元素的氧化物；所述熵调控的纳米晶粒分布在非晶SiO2基质中，非晶SiO2基质呈连续分布，纳米晶粒尺寸小于等于100nm。其制备方法包括采用化学工沉淀法制备非晶高能态陶瓷粉体，然后用快速热压烧结法制备块体纳米陶瓷。本发明微观结构设计合理，制备工艺简单可控，所得产品性能优良，便于工业化应用。
Nanometer high-entropy ceramic with high hardness and amorphous-nanocrystalline double-phase structure and preparation method of nanometer high-entropy ceramic
一种硬度高且具有非晶-纳米晶双相结构的纳米高熵陶瓷及其制备方法
FU LE (Autor:in) / WANG BOHAN (Autor:in) / YU WENJUN (Autor:in)
19.04.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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