Mitsubishi Chemical Corporation

The Ishizuka Research Institute, Ltd.

Satoshi Hayakawa

Toshihiko Sugano

Takayuki Aoshima

Naoshi Iwama

Masami Kashimoto

Taku Kato

Hisashi Shoda

Yoshinori Suga

Yasuo Maruyama

Toru Suzuki

Eiji Isobe

Sugio Nishimura

Stefan Sieber

Hiroshi Ishizuka

Process for producing &agr;-olefin polymers

Catalysts for polymerization of &agr;-olefins, process for producing &agr;-olefin polymers, novel transition metal compounds and catalyst components for polymerization of &agr;-olefin

Transition metal compounds

A diamond composite combined with a cobalt-containing substrate, comprising: a sintered mass of diamond, in which practically all the diamond particles are joined immediately with adjacent particles, a mass of cobalt-containing carbide, said latter mass being larger than the former and said first and latter masses being of a same cross section at the opposed ends, and an intermediate layer of a solid material which consists of Mo, Co and C with a minor proportion of inevitable impurities and which comprises a molybdenum carbide exhibiting a melting point within 200 degrees C. of that of the first said carbide material, said layer intervening between the masses and having a total radial cross sectional area of at least 80% but not greater than 97% of that of the diamond mass and carbide masses at the joint and a thickness of, at least, 25 microns over the whole cross sectional area and method for producing the same.

Diamond composite and method for producing the same

Growing community of inventors

Yokohama, Japan

Satoshi Hayakawa