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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 12668549 B1

PDFFull Text
Date of Patent:
Jun. 30, 2026

Filed:

Jan. 02, 2024

Gradient structure cubic boron nitride composite sheet and preparation method thereof

Applicants:

Central South University, Changsha, CN;

Sf Diamond Co., Ltd., Zhengzhou, CN;

Inventors:

Shaohe Zhang, Changsha, CN;

Yulu Li, Changsha, CN;

Dongpeng Zhao, Zhengzhou, CN;

Xiangwang Kong, Changsha, CN;

Linglong Rong, Changsha, CN;

Jincheng Li, Zhengzhou, CN;

Hua Gao, Zhengzhou, CN;

Dongyu Wu, Changsha, CN;

Jingjing Wu, Changsha, CN;

Leilei Liu, Changsha, CN;

Pinghe Sun, Changsha, CN;

Haijiang Fang, Zhengzhou, CN;

Assignees:

CENTRAL SOUTH UNIVERSITY, Changsha, CN;

SF DIAMOND CO., LTD., Zhengzhou, CN;

Attorney:

JCIPRNET

Primary Examiner:

Benjamin L Utech

Int. Cl.
CPC ...
C04B 35/56 (2006.01); B28B 1/00 (2006.01); B33Y 10/00 (2015.01); B33Y 70/10 (2020.01); C04B 35/5831 (2006.01); C04B 35/626 (2006.01); C04B 35/634 (2006.01);
U.S. Cl.
CPC ...
C04B 35/5626 (2013.01); B28B 1/001 (2013.01); B33Y 10/00 (2014.12); B33Y 70/10 (2020.01); C04B 35/5831 (2013.01); C04B 35/62695 (2013.01); C04B 35/6342 (2013.01); C04B 2235/3847 (2013.01); C04B 2235/386 (2013.01); C04B 2235/6026 (2013.01); C04B 2235/6562 (2013.01); C04B 2235/6567 (2013.01); C04B 2235/658 (2013.01); C04B 2235/75 (2013.01);
Abstract

The disclosure provides a gradient structure cubic boron nitride composite sheet and a preparation method thereof. The gradient structure cubic boron nitride composite sheet consists of a cemented carbide substrate, a gradient transition layer, and a CBN layer from bottom to top. The gradient transition layer consists of N gradient layers, and the N is 4 to 18. From bottom to top, there are sequentially a first gradient layer, a second gradient layer, an Nth gradient layer, and so on. Any of the gradient layers consists of CBN and cemented carbide, in which the volume fraction of the cemented carbide in the Nth layer is 5 to 30% less than the volume fraction of the cemented carbide in the N−1th layer, and the volume fraction of the CBN in the Nth layer is 5 to 30% more than the volume fraction of the CBN in the N−1th layer.

Find Patent Forward Citations

Zhang, Shaohe. (2026). Gradient structure cubic boron nitride composite sheet and preparation method thereof (U.S. Patent No. 12668549). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12668549

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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