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Preparation method of SiC nanofiber synergistic in-situ synthesis superfine layered TiCx reinforced SiC composite material
The invention relates to a preparation method of a SiC nanofiber synergistic in-situ synthesis superfine layered TiCx reinforced SiC composite material. Ti3AlC2 powder, SiC powder and dispersed SiC nanofibers are blended, mixed powder is obtained through high-energy ball milling, drying and sieving, a biscuit is obtained through compression molding, and finally hot pressed sintering is conducted. According to the preparation method disclosed by the invention, the high-toughness SiC nanofibers are utilized to cooperate with Ti3AlC2 to form a TiCx ceramic dispersion reinforcement with good interface wettability and a pure interface in situ in a SiC ceramic matrix, so that the SiC nanofiber-cooperated in-situ authigenic layered TiCx superfine particle reinforced SiC composite material with high compactness, super toughness, high strength, high temperature resistance and corrosion resistance is obtained, and the SiC nanofiber-cooperated in-situ authigenic layered TiCx superfine particle reinforced SiC composite material has the advantages of high compactness, super toughness, high strength, high temperature resistance and corrosion resistance. Compared with the externally added TiC, the interface wettability with the matrix is obviously improved; compared with the traditional SiC ceramic, the fracture toughness is increased from 2-5 MPa.m < 1/2 > to more than 9 MPa.m < 1/2 >, so that the structural ceramic is greatly toughened; compared with a traditional SiC ceramic-based composite material, the preparation process is simple, and the material has great potential in the fields of petrochemical engineering, carrier brake discs, hypersonic aircrafts and the like.
本发明涉及一种SiC纳米纤维协同原位自生超细层状TiCx增强SiC复合材料的制备方法。将Ti3AlC2粉体、SiC粉体和分散后SiC纳米纤维共混，经高能球磨、干燥、过筛获得混合粉料，模压成型得到素坯，最后热压烧结。本发明利用高韧性SiC纳米纤维协同Ti3AlC2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SiC纳米纤维协同原位自生层状TiCx超细颗粒增强SiC复合材料；相较外添加TiC与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9MPa·m1/2，实现结构陶瓷大幅增韧；相较传统SiC陶瓷基复合材料制备工艺简单，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。
Preparation method of SiC nanofiber synergistic in-situ synthesis superfine layered TiCx reinforced SiC composite material
The invention relates to a preparation method of a SiC nanofiber synergistic in-situ synthesis superfine layered TiCx reinforced SiC composite material. Ti3AlC2 powder, SiC powder and dispersed SiC nanofibers are blended, mixed powder is obtained through high-energy ball milling, drying and sieving, a biscuit is obtained through compression molding, and finally hot pressed sintering is conducted. According to the preparation method disclosed by the invention, the high-toughness SiC nanofibers are utilized to cooperate with Ti3AlC2 to form a TiCx ceramic dispersion reinforcement with good interface wettability and a pure interface in situ in a SiC ceramic matrix, so that the SiC nanofiber-cooperated in-situ authigenic layered TiCx superfine particle reinforced SiC composite material with high compactness, super toughness, high strength, high temperature resistance and corrosion resistance is obtained, and the SiC nanofiber-cooperated in-situ authigenic layered TiCx superfine particle reinforced SiC composite material has the advantages of high compactness, super toughness, high strength, high temperature resistance and corrosion resistance. Compared with the externally added TiC, the interface wettability with the matrix is obviously improved; compared with the traditional SiC ceramic, the fracture toughness is increased from 2-5 MPa.m < 1/2 > to more than 9 MPa.m < 1/2 >, so that the structural ceramic is greatly toughened; compared with a traditional SiC ceramic-based composite material, the preparation process is simple, and the material has great potential in the fields of petrochemical engineering, carrier brake discs, hypersonic aircrafts and the like.
本发明涉及一种SiC纳米纤维协同原位自生超细层状TiCx增强SiC复合材料的制备方法。将Ti3AlC2粉体、SiC粉体和分散后SiC纳米纤维共混，经高能球磨、干燥、过筛获得混合粉料，模压成型得到素坯，最后热压烧结。本发明利用高韧性SiC纳米纤维协同Ti3AlC2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SiC纳米纤维协同原位自生层状TiCx超细颗粒增强SiC复合材料；相较外添加TiC与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9MPa·m1/2，实现结构陶瓷大幅增韧；相较传统SiC陶瓷基复合材料制备工艺简单，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。
Preparation method of SiC nanofiber synergistic in-situ synthesis superfine layered TiCx reinforced SiC composite material
一种SiC纳米纤维协同原位自生超细层状TiCx增强SiC复合材料的制备方法
LI HAOLIN (author) / LYU LIUMING (author) / DONG QI (author) / GUO QINGFU (author) / REN XINGDI (author) / YANG XIAOYAN (author)
2024-09-20
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
Method for preparing in-situ synthesis superfine layered TiCx reinforced SiC composite material
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