Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-wear-resistance silicon nitride-based ceramic, and preparation method and application thereof
The invention discloses high-wear-resistance silicon nitride-based ceramic and a preparation method and application thereof. The preparation method of the silicon nitride-based ceramic comprises the steps: subjecting alpha-Si3N4 and a sintering aid to ball-milling mixing and then to drying so as to obtain mixed powder, and then subjecting the mixed powder to dry pressing forming to obtain a greenbody; presintering the green body at 1300-1700 DEG C, and carrying out cooling to room temperature to obtain a presintered body; and sintering the presintered body at a temperature of 1600-1800 DEG Cunder the condition that a pressure is increased to 30-100 MPa in the axial direction to obtain the high-wear-resistance silicon nitride-based ceramic. The radial centripetal flow of the high-wear-resistance silicon nitride-based ceramic is realized through the plastic flow of the high-wear-resistance silicon nitride-based ceramic at high temperature, so the radial directional texturing of crystalgrains is realized, and the high-wear-resistance silicon nitride-based ceramic is obtained.
本发明公开了一种高耐磨的氮化硅基陶瓷及其制备方法和应用，所述氮化硅基陶瓷是将α‑SiN和烧结助剂进行球磨混合，干燥得到混合粉体，再将混合粉体干压成型得到生坯；将生坯在1300~1700℃下预烧，降温到室温后获得预烧体；将预烧体在1600~1800℃，轴向加压加至30~100 MPa下进行烧结得到高耐磨氮化硅基陶瓷。本发明的高耐磨氮化硅基陶瓷在高温下的塑性流动实现氮化硅基陶瓷的径向向心流动，从而实现晶粒径向定向织构化，从而获得高耐磨氮化硅基陶瓷。
High-wear-resistance silicon nitride-based ceramic, and preparation method and application thereof
The invention discloses high-wear-resistance silicon nitride-based ceramic and a preparation method and application thereof. The preparation method of the silicon nitride-based ceramic comprises the steps: subjecting alpha-Si3N4 and a sintering aid to ball-milling mixing and then to drying so as to obtain mixed powder, and then subjecting the mixed powder to dry pressing forming to obtain a greenbody; presintering the green body at 1300-1700 DEG C, and carrying out cooling to room temperature to obtain a presintered body; and sintering the presintered body at a temperature of 1600-1800 DEG Cunder the condition that a pressure is increased to 30-100 MPa in the axial direction to obtain the high-wear-resistance silicon nitride-based ceramic. The radial centripetal flow of the high-wear-resistance silicon nitride-based ceramic is realized through the plastic flow of the high-wear-resistance silicon nitride-based ceramic at high temperature, so the radial directional texturing of crystalgrains is realized, and the high-wear-resistance silicon nitride-based ceramic is obtained.
本发明公开了一种高耐磨的氮化硅基陶瓷及其制备方法和应用，所述氮化硅基陶瓷是将α‑SiN和烧结助剂进行球磨混合，干燥得到混合粉体，再将混合粉体干压成型得到生坯；将生坯在1300~1700℃下预烧，降温到室温后获得预烧体；将预烧体在1600~1800℃，轴向加压加至30~100 MPa下进行烧结得到高耐磨氮化硅基陶瓷。本发明的高耐磨氮化硅基陶瓷在高温下的塑性流动实现氮化硅基陶瓷的径向向心流动，从而实现晶粒径向定向织构化，从而获得高耐磨氮化硅基陶瓷。
High-wear-resistance silicon nitride-based ceramic, and preparation method and application thereof
高耐磨的氮化硅基陶瓷及其制备方法和应用
11.08.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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