Composite sintered material

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United States of America Patent

PATENT NO 11920222
APP PUB NO 20210238716A1
SERIAL NO

17049599

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Abstract

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A composite sintered material includes: a plurality of diamond grains having an average grain size of less than or equal to 10 μm; a plurality of cubic boron nitride grains having an average grain size of less than or equal to 2 μm; and a plurality of aluminum oxide grains having an average grain size of less than or equal to 0.5 μm; and a remainder of a binder phase, wherein at least parts of adjacent diamond grains are bound to one another, the binder phase includes cobalt, in the composite sintered material, a content of the diamond grains is from 30 to 92 volume %, a content of the cubic boron nitride grains is from 3 to 40 volume %, a content of the aluminum oxide grains is from 2 to 15 volume %, and a content of the cobalt is from 3 to 30 volume %.

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Patent Owner(s)

Patent OwnerAddress
SUMITOMO ELECTRIC INDUSTRIES LTDOSAKA-SHI OSAKA 541-0041
SUMITOMO ELECTRIC HARDMETAL CORPITAMI-SHI HYOGO 664-0016

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Harada, Takashi Osaka, JP 351 4614
Higashi, Taisuke Itami, JP 28 29
Kukino, Satoru Itami, JP 164 1090
Okamura, Katsumi Osaka, JP 99 408
Watanobe, Naoki Osaka, JP 35 90

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