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High-strength and high-thermal-conductivity silicon nitride ceramic cutter as well as preparation method and application thereof
The invention provides a high-strength and high-thermal-conductivity silicon nitride ceramic cutter as well as a preparation method and application thereof, and belongs to the technical field of ceramic materials. The high-strength and high-thermal-conductivity silicon nitride ceramic cutter provided by the invention is prepared from the following raw materials in percentage by mass: 70 to 90 percent of alpha-Si3N4 powder, 0.5 to 1 percent of beta-Si3N4 seed crystal, 2 to 5 percent of rare earth oxide, 5 to 10 percent of diamond with a metal coating and the balance of sintering aid. The result of the embodiment shows that the bending strength of the high-strength and high-thermal-conductivity silicon nitride ceramic cutting tool exceeds 1100 MPa, the fracture toughness exceeds 11.5 MPa/m < 2 >, and the Vickers hardness exceeds 18 GPa.
本发明提供了一种高强高导热氮化硅陶瓷刀具及其制备方法和应用，属于陶瓷材料技术领域。本发明提供的高强高导热氮化硅陶瓷刀具，按质量百分比计，制备所述高强高导热氮化硅陶瓷刀具的原料包括70～90％的α‑Si3N4粉末，0.5～1％的β‑Si3N4晶种，2～5％的稀土氧化物，5～10％的具有金属镀层的金刚石和余量的烧结助剂。实施例的结果显示，本发明提供的高强高导热氮化硅陶瓷刀具的抗弯强度超过1100MPa，断裂韧性超过11.5MPa/m2，维氏硬度超过18GPa。
High-strength and high-thermal-conductivity silicon nitride ceramic cutter as well as preparation method and application thereof
The invention provides a high-strength and high-thermal-conductivity silicon nitride ceramic cutter as well as a preparation method and application thereof, and belongs to the technical field of ceramic materials. The high-strength and high-thermal-conductivity silicon nitride ceramic cutter provided by the invention is prepared from the following raw materials in percentage by mass: 70 to 90 percent of alpha-Si3N4 powder, 0.5 to 1 percent of beta-Si3N4 seed crystal, 2 to 5 percent of rare earth oxide, 5 to 10 percent of diamond with a metal coating and the balance of sintering aid. The result of the embodiment shows that the bending strength of the high-strength and high-thermal-conductivity silicon nitride ceramic cutting tool exceeds 1100 MPa, the fracture toughness exceeds 11.5 MPa/m < 2 >, and the Vickers hardness exceeds 18 GPa.
本发明提供了一种高强高导热氮化硅陶瓷刀具及其制备方法和应用，属于陶瓷材料技术领域。本发明提供的高强高导热氮化硅陶瓷刀具，按质量百分比计，制备所述高强高导热氮化硅陶瓷刀具的原料包括70～90％的α‑Si3N4粉末，0.5～1％的β‑Si3N4晶种，2～5％的稀土氧化物，5～10％的具有金属镀层的金刚石和余量的烧结助剂。实施例的结果显示，本发明提供的高强高导热氮化硅陶瓷刀具的抗弯强度超过1100MPa，断裂韧性超过11.5MPa/m2，维氏硬度超过18GPa。
High-strength and high-thermal-conductivity silicon nitride ceramic cutter as well as preparation method and application thereof
一种高强高导热氮化硅陶瓷刀具及其制备方法和应用
ZENG XIAOFENG (author) / ZHU FULIN (author) / XIAO LIANG (author) / QIAN LIHONG (author) / NIE RONG (author)
2022-12-09
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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