Diamond polycrystal, tool including diamond polycrystal, and method of producing diamond polycrystal
AssigneeSumitomo Electric Industries, Ltd.
InventorsHitoshi Sumiya, Katsuko Yamamoto
Life of this patent
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Abstract
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.
Claims5
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 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.
Dependencies are inferred from the claim text.