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Silicon nitride ceramic cutter and preparation method thereof
The invention belongs to the technical field of silicon nitride ceramics, and particularly relates to a silicon nitride ceramic cutter and a preparation method thereof.The preparation method comprises the following steps that firstly, 75%-85% by weight of silicon nitride powder, 10%-16% by weight of pre-oxidized silicon nitride powder and 5%-10% by weight of ZrO2-Y2O3 powder are weighed and stirred with water and ethyl alcohol, and ceramic slurry is prepared; spraying the ceramic slurry in hot air flow, granulating, drying, grinding and sieving to obtain ceramic powder; carrying out compression molding on the ceramic powder to obtain a ceramic body; the ceramic green body is sintered, the silicon nitride ceramic cutting tool is obtained, the Vickers hardness of the obtained silicon nitride ceramic cutting tool ranges from 21.6 GPa to 27.5 GPa, the fracture toughness ranges from 12.7 MPa.m < 1/2 > to 15.8 MPa.m < 1/2 >, and the bending strength ranges from 1053 MPa to 1290 MPa.
本发明属于氮化硅陶瓷技术领域，具体是涉及到一种氮化硅陶瓷刀具及制备方法，制备方法包括以下步骤：首先按重量百分比称取以下组分：氮化硅粉75％‑85％、预氧化的氮化硅粉10％‑16％和ZrO2‑Y2O3粉5％‑10％与水和乙醇搅拌，制成陶瓷浆；将陶瓷浆在热气流中，雾喷，进行造粒，干燥，研磨，过筛，得陶瓷粉料；将陶瓷粉料压制成型，得陶瓷坯体；将陶瓷坯体烧结，得到氮化硅陶瓷刀具，本发明得到的氮化硅陶瓷刀具维氏硬度为21.6‑27.5GPa，断裂韧性为12.7‑15.8MPa·m1/2，抗弯强度为1053‑1290MPa。
Silicon nitride ceramic cutter and preparation method thereof
The invention belongs to the technical field of silicon nitride ceramics, and particularly relates to a silicon nitride ceramic cutter and a preparation method thereof.The preparation method comprises the following steps that firstly, 75%-85% by weight of silicon nitride powder, 10%-16% by weight of pre-oxidized silicon nitride powder and 5%-10% by weight of ZrO2-Y2O3 powder are weighed and stirred with water and ethyl alcohol, and ceramic slurry is prepared; spraying the ceramic slurry in hot air flow, granulating, drying, grinding and sieving to obtain ceramic powder; carrying out compression molding on the ceramic powder to obtain a ceramic body; the ceramic green body is sintered, the silicon nitride ceramic cutting tool is obtained, the Vickers hardness of the obtained silicon nitride ceramic cutting tool ranges from 21.6 GPa to 27.5 GPa, the fracture toughness ranges from 12.7 MPa.m < 1/2 > to 15.8 MPa.m < 1/2 >, and the bending strength ranges from 1053 MPa to 1290 MPa.
本发明属于氮化硅陶瓷技术领域，具体是涉及到一种氮化硅陶瓷刀具及制备方法，制备方法包括以下步骤：首先按重量百分比称取以下组分：氮化硅粉75％‑85％、预氧化的氮化硅粉10％‑16％和ZrO2‑Y2O3粉5％‑10％与水和乙醇搅拌，制成陶瓷浆；将陶瓷浆在热气流中，雾喷，进行造粒，干燥，研磨，过筛，得陶瓷粉料；将陶瓷粉料压制成型，得陶瓷坯体；将陶瓷坯体烧结，得到氮化硅陶瓷刀具，本发明得到的氮化硅陶瓷刀具维氏硬度为21.6‑27.5GPa，断裂韧性为12.7‑15.8MPa·m1/2，抗弯强度为1053‑1290MPa。
Silicon nitride ceramic cutter and preparation method thereof
一种氮化硅陶瓷刀具及制备方法
ZHU FULIN (author) / TAN QINGWEN (author) / XIAO LI (author) / WEN JINTAO (author) / SHAYAMA SUI (author)
2023-07-14
Patent
Electronic Resource
Chinese
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