Single-crystal diamond and method of manufacturing the same
US-2024175167-A1 · May 30, 2024 · US
Diamond polycrystal, tool including diamond polycrystal, and method of producing diamond polycrystal
US11814293B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11814293-B2 |
| Application number | US-201816489641-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 1, 2018 |
| Priority date | Oct 1, 2018 |
| Publication date | Nov 14, 2023 |
| Grant date | Nov 14, 2023 |
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- Title
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Abstract
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A diamond polycrystal includes diamond grains, the diamond polycrystal including a cubic diamond and a 6H type hexagonal diamond, wherein the cubic diamond and the 6H type hexagonal diamond exist in the same or different diamond grains, and a ratio Ab1/Ab2 is more than or equal to 0.4 and less than or equal to 1, Ab1 representing a maximum value of absorption in a range of more than or equal to 1200 cm−1 and less than or equal to 1300 cm−1 in an infrared absorption spectrum, Ab2 representing a maximum value of absorption in a range of more than or equal to 1900 cm−1 and less than or equal to 2100 cm−1.
First claim
Opening claim text (preview).
The invention claimed is: 1. A diamond polycrystal comprising diamond grains, the diamond polycrystal including a cubic diamond and a 6H type hexagonal diamond, wherein the cubic diamond and the 6H type hexagonal diamond exist in the same or different diamond grains, and a ratio Ab 1 /Ab 2 is more than or equal to 0.4 and less than or equal to 1, Ab 1 representing a maximum value of absorption in a range of more than or equal to 1200 cm −1 and less than or equal to 1300 cm −1 in an infrared absorption spectrum, Ab 2 representing a maximum value of absorption in a range of more than or equal to 1900 cm −1 and less than or equal to 2100 cm −1 . 2. The diamond polycrystal according to claim 1 , wherein the 6H type hexagonal diamond exists in a form of a layer in each of corresponding diamond grains. 3. The diamond polycrystal according to claim 1 , wherein the diamond polycrystal has a Knoop hardness of more than or equal to 100 GPa and less than or equal to 150 GPa at a room temperature. 4. The diamond polycrystal according to claim 1 , wherein an average grain size of the diamond grains is more than or equal to 1 nm and less than or equal to 60 nm. 5. A tool comprising the diamond polycrystal recited in claim 1 .
Assignees
Inventors
Classifications
- C01B32/26Primary
Preparation (by using ultra-high pressure B01J3/06; by crystal growth C30B29/04) · CPC title
with diamond bits {or cutting inserts} · CPC title
Diamond · CPC title
Compounds characterised by their crystallite size · CPC title
by a space-group or by other symmetry indications · CPC title
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- What does patent US11814293B2 cover?
- A diamond polycrystal includes diamond grains, the diamond polycrystal including a cubic diamond and a 6H type hexagonal diamond, wherein the cubic diamond and the 6H type hexagonal diamond exist in the same or different diamond grains, and a ratio Ab1/Ab2 is more than or equal to 0.4 and less than or equal to 1, Ab1 representing a maximum value of absorption in a range of more than or equal to…
- Who is the assignee on this patent?
- Sumitomo Electric Industries
- What technology area does this patent fall under?
- Primary CPC classification C01B32/26. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Nov 14 2023 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).