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Alumina-based composite ceramic and preparation method thereof
The invention belongs to the technical field of ceramic materials, and discloses an alumina-based composite ceramic and a preparation method thereof. The alumina-based composite ceramic comprises the following components in percentage by mass: 45-70% of alpha-Al2O3, 1-30% of 3Y-ZrO2 and 10-40% of beta-SiC. The preparation method of the alumina-based composite ceramic comprises the following steps: respectively weighing the above raw materials according to the above-mentioned percentages by weight; with isopropanol as a ball-milling medium, mixing, ball-milling and drying the raw materials to obtain uniformly-mixed powdery raw materials; carrying out hot pressed sintering on the powdery raw materials to obtain a block sample; and polishing and cleaning the sample, and placing the sample in a high-temperature muffle furnace for high-temperature annealing. According to the invention, SiC is introduced into a ceramic material, and by means of selective oxidation of SiC in the high-temperature annealing process, a surface SiO2 layer can be constructed, defects caused by preparation and processing can be repaired and reduced, and the fracture toughness and bending strength of the ceramic material are improved.
本发明属于陶瓷材料技术领域，公开了一种氧化铝基复合陶瓷及制备方法，所述氧化铝基复合陶瓷按质量百分数计，由45～70wt.％的α‑Al2O3、1～30wt.％的3Y‑ZrO2和10～40wt.％的β‑SiC组成；所述氧化铝基复合陶瓷的制备方法包括：按重量百分数分别称取原料；以异丙醇作为球磨介质，将原料混合球磨，烘干，得到均匀混合的粉体原料；将粉体原料热压烧结，得到块体样品；对试样进行抛光，清洗，置于高温马弗炉中高温退火。本发明在陶瓷材料中引入SiC，借助SiC在高温退火过程中的选择性氧化，可实现表面SiO2层的构建，有助于修复和减少因制备和加工引起的缺陷，提高陶瓷材料的断裂韧性和抗弯强度。
Alumina-based composite ceramic and preparation method thereof
The invention belongs to the technical field of ceramic materials, and discloses an alumina-based composite ceramic and a preparation method thereof. The alumina-based composite ceramic comprises the following components in percentage by mass: 45-70% of alpha-Al2O3, 1-30% of 3Y-ZrO2 and 10-40% of beta-SiC. The preparation method of the alumina-based composite ceramic comprises the following steps: respectively weighing the above raw materials according to the above-mentioned percentages by weight; with isopropanol as a ball-milling medium, mixing, ball-milling and drying the raw materials to obtain uniformly-mixed powdery raw materials; carrying out hot pressed sintering on the powdery raw materials to obtain a block sample; and polishing and cleaning the sample, and placing the sample in a high-temperature muffle furnace for high-temperature annealing. According to the invention, SiC is introduced into a ceramic material, and by means of selective oxidation of SiC in the high-temperature annealing process, a surface SiO2 layer can be constructed, defects caused by preparation and processing can be repaired and reduced, and the fracture toughness and bending strength of the ceramic material are improved.
本发明属于陶瓷材料技术领域，公开了一种氧化铝基复合陶瓷及制备方法，所述氧化铝基复合陶瓷按质量百分数计，由45～70wt.％的α‑Al2O3、1～30wt.％的3Y‑ZrO2和10～40wt.％的β‑SiC组成；所述氧化铝基复合陶瓷的制备方法包括：按重量百分数分别称取原料；以异丙醇作为球磨介质，将原料混合球磨，烘干，得到均匀混合的粉体原料；将粉体原料热压烧结，得到块体样品；对试样进行抛光，清洗，置于高温马弗炉中高温退火。本发明在陶瓷材料中引入SiC，借助SiC在高温退火过程中的选择性氧化，可实现表面SiO2层的构建，有助于修复和减少因制备和加工引起的缺陷，提高陶瓷材料的断裂韧性和抗弯强度。
Alumina-based composite ceramic and preparation method thereof
一种氧化铝基复合陶瓷及制备方法
CHEN YONGJUN (author) / LUO LIJIE (author) / CHEN XIANZHI (author) / LI JIANBAO (author)
2021-09-17
Patent
Electronic Resource
Chinese
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