Cubic boron nitride polycrystalline material, cutting tool, wear resistant tool, grinding tool, and method of manufacturing cubic boron nitride polycrystalline material
US-2018265416-A1 · Sep 20, 2018 · US
Cubic boron nitride polycrystalline material, cutting tool, wear resistant tool, grinding tool, and method of manufacturing cubic boron nitride polycrystalline material
US10562822B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10562822-B2 |
| Application number | US-201615546431-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 13, 2016 |
| Priority date | Feb 4, 2015 |
| Publication date | Feb 18, 2020 |
| Grant date | Feb 18, 2020 |
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Abstract
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It is an object to provide a cubic boron nitride polycrystalline material excellent in toughness. A cubic boron nitride polycrystalline material containing fine cubic boron nitride which is granular, has a maximum grain size not greater than 100 nm, and has an average grain size not greater than 70 nm and at least one of plate-shaped cubic boron nitride in a form of a plate having an average major radius not smaller than 50 nm and not greater than 10000 nm and coarse cubic boron nitride which is granular, has a minimum grain size exceeding 100 nm, and has an average grain size not greater than 1000 nm is provided.
First claim
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The invention claimed is: 1. A cubic boron nitride polycrystalline material comprising: fine cubic boron nitride which is granular, has a maximum grain size not greater than 100 nm, and has an average grain size not greater than 70 nm; plate-shaped cubic boron nitride which is in a form of a plate and has an average major radius not smaller than 50 nm and not greater than 10000 nm; and coarse cubic boron nitride which is granular, has a minimum grain size exceeding 100 nm, and has an average grain size not greater than 1000 nm. 2. The cubic boron nitride polycrystalline material according to claim 1 , the cubic boron nitride polycrystalline material further comprising wurtzite type boron nitride, wherein a content of the wurtzite type boron nitride is not lower than 0.01 volume % and not higher than 80 volume %. 3. The cubic boron nitride polycrystalline material according to claim 1 , the cubic boron nitride polycrystalline material further comprising compression type hexagonal boron nitride, wherein a content of the compression type hexagonal boron nitride is not lower than 0.01 volume % and not higher than 0.5 volume %. 4. A cutting tool comprising the cubic boron nitride polycrystalline material according to claim 1 . 5. A wear resistant tool comprising the cubic boron nitride polycrystalline material according to claim 1 . 6. A grinding tool comprising the cubic boron nitride polycrystalline material according to claim 1 .
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Classifications
Bimodal, multi-modal or multi-fractional · CPC title
based on boron nitride · CPC title
Micrometer sized grains, i.e. from 1 to 100 micron · CPC title
Submicron sized grains, i.e. from 0,1 to 1 micron · CPC title
nanometer sized, i.e. below 100 nm · CPC title
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- What does patent US10562822B2 cover?
- It is an object to provide a cubic boron nitride polycrystalline material excellent in toughness. A cubic boron nitride polycrystalline material containing fine cubic boron nitride which is granular, has a maximum grain size not greater than 100 nm, and has an average grain size not greater than 70 nm and at least one of plate-shaped cubic boron nitride in a form of a plate having an average ma…
- Who is the assignee on this patent?
- Sumitomo Electric Industries
- What technology area does this patent fall under?
- Primary CPC classification C04B35/5831. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Feb 18 2020 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).