金刚石芯纳米聚晶材料、其制备方法及超硬刀具

王培; 赵予生; 邹永涛; 王善民; 王李平

王培

南方科技大学

南方科技大学

518000 广东省深圳市南山区西丽学苑大道1088号

南方科技大学

518000 广东省深圳市南山区西丽学苑大道1088号 (广东,深圳,南山区)

南方科技大学

518000 广东省深圳市南山区西丽学苑大道1088号 (广东,深圳,南山区)

CN201910022088.X

2019-01-10

CN109748276B

2020-12-18

2020-12-18

授权

2020-12-18

授权发明

第一

本发明提供一种金刚石芯纳米聚晶材料、其制备方法及超硬刀具，属于超硬质材料技术领域。金刚石芯纳米聚晶材料包括内核和外壳，内核包括纳米金刚石，外壳包括B－C－N固溶体。金刚石芯纳米聚晶材料的制备方法，包括如下步骤：将纳米金刚石粉体或含有部分纳米金刚石粉体的纳米碳粉体通过湿混在超声条件下填充进入氮化硼纳米管内得到填充体，将填充体在真空的条件下处理，再预压成型得到坯件；将坯件烧结固溶强化得到金刚石芯纳米聚晶材料。此金刚石芯纳米聚晶材料能够解决现有技术中立方氮化硼硬度不高和金刚石切削石墨化的技术问题，热稳定性和硬度同时提高、以及耐磨损性能增强，能够用来制备超硬刀具。

The invention provides a diamond core nano polycrystalline material, a preparation method thereof and a superhard knife and belongs to the technical field of superhard materials. The diamond core nanopolycrystalline material comprises an inner core and an outer shell, the inner core comprises nano diamond, and the outer shell comprises B-C-N sosoloid. The preparation method includes following steps: filling nano diamond powder or nano carbon powder containing part of the nano diamond powder into a boron nitride nanotube through wet mixing under an ultrasonic condition to obtain a filled body,treating the filled body in a vacuum condition, and prepress-forming to obtain a blank; subjecting the blank to sintering and solid solution strengthening to obtain the diamond core nano polycrystalline material. By the diamond core nano polycrystalline material, the technical problems that cubic boron nitride is low in hardness and that diamond cutting is prone to graphitilization in the prior art can be solved, thermostability, hardness and wear resistance are improved, and the material can be used for preparing the superhard knife.

C01B32/26 ; C01B32/25 ; B28D1/00

（+PATENT GRANT）[2020-12-18][CN]

1

1

逯恒

北京超凡志成知识产权代理事务所(普通合伙)

PatSnap

王培,赵予生,邹永涛,等. 金刚石芯纳米聚晶材料、其制备方法及超硬刀具[P]. 2020-12-18.