Composite polycrystal and tool with composite polycrystal
AssigneeSumitomo Electric Hardmetal Corp.
InventorsYuh Ishida, Michiko Matsukawa, Satoru Kukino
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Abstract
A polycrystalline composite comprising diamond particles and non-diamond carbon, wherein: the sum of the content Vd of the diamond particles and the content Vg of the non-diamond carbon is more than 99% by volume based on the total volume of the polycrystalline composite; the median diameter d50 of the diamond particles is 10 nm or more and 200 nm or less; the dislocation density of the diamond particles is 1.0×1013 m−2 or more and 1.0×1016 m−2 or less; and the content Vd of the diamond particles and the content Vg of the non-diamond carbon satisfy the relationship represented by the formula 1:0.01<Vg/(Vd+Vg)≤0.5 Formula 1.
Claims9
A polycrystalline composite comprising diamond particles and non-diamond carbon, wherein:
- a sum of a content Vd of the diamond particles and a content Vg of the non-diamond carbon is more than 99% by volume based on the total volume of the polycrystalline composite;
- a median diameter d50 of the diamond particles is 10 nm or more and 200 nm or less;
- a dislocation density of the diamond particles is 1.0×1013 m−2 or more and 1.0×1016 m−2 or less;
- and
- the content Vd of the diamond particles and the content Vg of the non-diamond carbon satisfy a relationship represented by formula 1:
- 0.01
- <
- Vg
- /
- (
- Vd
- +
- Vg
- )
- ≤
- 0.5
- .
- Formula
-
- 1
Dependencies are inferred from the claim text.