Sumitomo Electric Industries, Limited

A.l.m.t. Corporation

Sumitomo Electric Hardmetal Corp.

Kei Hirai

Satoru Kukino

Katsumi Okamura

Akito Ishii

Miki Miyanaga

Masato Michiuchi

Shin-ichi Yamagata

Tsutomu Hirano

Kentaro Chihara

Daisuke Kondo

Hirotsugu Iwasaki

Nobuhide Nakamura

Toru Maeda

Masayuki Ito

Masahiro Ohata

A diamond sintered material includes diamond grains, wherein a content ratio of the diamond grains is more than or equal to 80 volume % and less than or equal to 99 volume % with respect to the diamond sintered material, an average grain size of the diamond grains is more than or equal to 0.1 μm and less than or equal to 50 μm, and a dislocation density of the diamond grains is more than or equal to 8.1×10mand less than 1.0×10m.

Diamond sintered material and tool including diamond sintered material

A composite material has a plate shape and has a first surface and a second surface. The second surface is opposite to the first surface. The composite material includes a plurality of first layers and at least one second layer. The first layers and the second layer are alternately layered along a thickness direction of the composite material such that the first layers are located at the first surface and the second surface. Each of the first layers is a layer including copper. The second layer is a layer of a molybdenum powder compact impregnated with copper. A compressive residual stress of 50 MPa or less acts on each of the first layer located at the first surface and the first layer located at the second surface.

Composite material, semiconductor package, and method of manufacturing composite material

A coated super-abrasive grain comprises: a body composed of cubic boron nitride; and a coating film coating at least a portion of a surface of the body, the body having a dislocation density of 9×10/mor less, the coating film including one or more types of compounds composed of at least one type of element selected from the group consisting of a group 4 element, a group 5 element and a group 6 element of the periodic table, aluminum and silicon, and at least one type of element selected from the group consisting of oxygen, nitrogen, carbon, and boron.

Coated super-abrasive grains, abrasive grains, and wheel

Growing community of inventors

Osaka, Japan

Kei Hirai