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Alpha-phase silicon nitride and preparation method and application thereof
The invention discloses alpha-phase silicon nitride as well as a preparation method and application thereof. The crystal structure of the alpha-phase silicon nitride belongs to a hexagonal system, and the crystal grains are equiaxed spheres with isotropic characteristics; the grain size of the crystal grains is 100-500 nm, the hardness is 21-28 GPa, the fracture toughness is 6-9 MPa.m < 1/2 >, and the bending strength is 1000-1400 MPa. The obtained high-performance silicon nitride ceramic material has higher density, hardness, fracture toughness and strength. The performance index of the silicon nitride ceramic structural member is remarkably superior to that of a commercial silicon nitride ceramic structural member, the highest hardness can reach 28 GPa, the highest fracture toughness can reach 9 MPa.m < 1/2 >, and the highest bending strength can reach 1400 MPa. In addition, the preparation method is simple, parameters are easy to control, and the method is suitable for industrial production.
本发明公开了一种α相氮化硅及其制备方法和应用。所述α相氮化硅的晶体结构属六方晶系，晶粒为具有各向同性特征的等轴球型；晶粒粒径尺寸为100～500 nm，硬度为21～28 GPa，断裂韧性为6～9 MPa·m1/2，抗弯强度为1000～1400 MPa。本发明得到的高性能氮化硅陶瓷材料具有更高的致密度、硬度、断裂韧性和强度。其性能指标显著优于商业化氮化硅陶瓷结构件，硬度最高可达28 GPa，断裂韧性最高可达9 MPa·m1/2，抗弯强度最高可达1400 MPa。另外，制备方法简单，参数易于控制，适合工业化生产。
Alpha-phase silicon nitride and preparation method and application thereof
The invention discloses alpha-phase silicon nitride as well as a preparation method and application thereof. The crystal structure of the alpha-phase silicon nitride belongs to a hexagonal system, and the crystal grains are equiaxed spheres with isotropic characteristics; the grain size of the crystal grains is 100-500 nm, the hardness is 21-28 GPa, the fracture toughness is 6-9 MPa.m < 1/2 >, and the bending strength is 1000-1400 MPa. The obtained high-performance silicon nitride ceramic material has higher density, hardness, fracture toughness and strength. The performance index of the silicon nitride ceramic structural member is remarkably superior to that of a commercial silicon nitride ceramic structural member, the highest hardness can reach 28 GPa, the highest fracture toughness can reach 9 MPa.m < 1/2 >, and the highest bending strength can reach 1400 MPa. In addition, the preparation method is simple, parameters are easy to control, and the method is suitable for industrial production.
本发明公开了一种α相氮化硅及其制备方法和应用。所述α相氮化硅的晶体结构属六方晶系，晶粒为具有各向同性特征的等轴球型；晶粒粒径尺寸为100～500 nm，硬度为21～28 GPa，断裂韧性为6～9 MPa·m1/2，抗弯强度为1000～1400 MPa。本发明得到的高性能氮化硅陶瓷材料具有更高的致密度、硬度、断裂韧性和强度。其性能指标显著优于商业化氮化硅陶瓷结构件，硬度最高可达28 GPa，断裂韧性最高可达9 MPa·m1/2，抗弯强度最高可达1400 MPa。另外，制备方法简单，参数易于控制，适合工业化生产。
Alpha-phase silicon nitride and preparation method and application thereof
一种α相氮化硅及其制备方法和应用
JI WEI (author) / QIN XIAOWEI (author) / FU ZHENGYI (author) / WANG WEIMIN (author) / ZHANG FAN (author)
2024-12-10
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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