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Method for preparing in-situ synthesis superfine layered TiCx reinforced SiC composite material
The invention discloses a preparation method of an in-situ synthesis superfine layered TiCx reinforced SiC composite material. The preparation method comprises the following steps: blending Ti3AlC2 and SiC powder, carrying out high-energy ball milling, drying and sieving to obtain mixed powder, carrying out compression molding to obtain a biscuit, and carrying out hot pressed sintering. According to the in-situ synthesis layered TiCx ultrafine particle reinforced SiC composite material and the preparation method thereof, a TiCx ceramic dispersion reinforcement body with good interface wettability and a pure interface is formed in a SiC ceramic matrix in situ by utilizing the structural metamorphic characteristic of Ti3AlC2, and the in-situ synthesis layered TiCx ultrafine particle reinforced SiC composite material with high compactness, super toughness, high strength, high temperature resistance and corrosion resistance is obtained; compared with an externally added reinforcing body, the interface wettability with a ceramic matrix is remarkably improved; compared with the traditional SiC ceramic, the fracture toughness is increased from 2-5 MPa.m < 1/2 > to more than 10 MPa.m < 1/2 >, so that the structural ceramic is greatly toughened; compared with a traditional SiC ceramic preparation process, the preparation process is simpler, a sintering aid does not need to be added, the sintering temperature is low, the material is suitable for large-scale preparation, and the material has great potential in the fields of petrochemical engineering, carrier brake discs, hypersonic aircrafts and the like.
本发明公开了一种原位自生超细层状TiCx增强SiC复合材料的制备方法。将Ti3AlC2与SiC粉体共混，经高能球磨、干燥、过筛获得混合粉料，模压成型得到素坯，再进行热压烧结。本发明利用Ti3AlC2的结构蜕变特性在SiC陶瓷基体中原位形成界面润湿性良好且界面纯净的TiCx陶瓷弥散增强体，得到一种高致密、超韧高强、耐高温和抗腐蚀的原位自生层状TiCx超细颗粒增强SiC复合材料；相较外添加增强体与陶瓷基体的界面润湿性得到显著改善；相较传统SiC陶瓷的断裂韧性2‑5MPa·m1/2跃升至超过10MPa·m1/2，实现结构陶瓷大幅增韧；相较传统SiC陶瓷制备工艺更简单、无需添加烧结助剂、烧结温度低且适合规模化制备，该材料在石油化工、载具刹车盘、高超声速飞行器等领域具备很大潜力。
Method for preparing in-situ synthesis superfine layered TiCx reinforced SiC composite material
The invention discloses a preparation method of an in-situ synthesis superfine layered TiCx reinforced SiC composite material. The preparation method comprises the following steps: blending Ti3AlC2 and SiC powder, carrying out high-energy ball milling, drying and sieving to obtain mixed powder, carrying out compression molding to obtain a biscuit, and carrying out hot pressed sintering. According to the in-situ synthesis layered TiCx ultrafine particle reinforced SiC composite material and the preparation method thereof, a TiCx ceramic dispersion reinforcement body with good interface wettability and a pure interface is formed in a SiC ceramic matrix in situ by utilizing the structural metamorphic characteristic of Ti3AlC2, and the in-situ synthesis layered TiCx ultrafine particle reinforced SiC composite material with high compactness, super toughness, high strength, high temperature resistance and corrosion resistance is obtained; compared with an externally added reinforcing body, the interface wettability with a ceramic matrix is remarkably improved; compared with the traditional SiC ceramic, the fracture toughness is increased from 2-5 MPa.m < 1/2 > to more than 10 MPa.m < 1/2 >, so that the structural ceramic is greatly toughened; compared with a traditional SiC ceramic preparation process, the preparation process is simpler, a sintering aid does not need to be added, the sintering temperature is low, the material is suitable for large-scale preparation, and the material has great potential in the fields of petrochemical engineering, carrier brake discs, hypersonic aircrafts and the like.
本发明公开了一种原位自生超细层状TiCx增强SiC复合材料的制备方法。将Ti3AlC2与SiC粉体共混，经高能球磨、干燥、过筛获得混合粉料，模压成型得到素坯，再进行热压烧结。本发明利用Ti3AlC2的结构蜕变特性在SiC陶瓷基体中原位形成界面润湿性良好且界面纯净的TiCx陶瓷弥散增强体，得到一种高致密、超韧高强、耐高温和抗腐蚀的原位自生层状TiCx超细颗粒增强SiC复合材料；相较外添加增强体与陶瓷基体的界面润湿性得到显著改善；相较传统SiC陶瓷的断裂韧性2‑5MPa·m1/2跃升至超过10MPa·m1/2，实现结构陶瓷大幅增韧；相较传统SiC陶瓷制备工艺更简单、无需添加烧结助剂、烧结温度低且适合规模化制备，该材料在石油化工、载具刹车盘、高超声速飞行器等领域具备很大潜力。
Method for preparing in-situ synthesis superfine layered TiCx reinforced SiC composite material
一种原位自生超细层状TiCx增强SiC复合材料制备的方法
LI HAOLIN (author) / LYU LIUMING (author) / DONG QI (author) / REN XINGDI (author) / GUO QINGFU (author) / YANG XIAOYAN (author)
2024-09-20
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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