DIAMOND SINTERED BODY AND ITS MANUFACTURE AS WELL AS CATALYST USED AT THE TIME OF THE MANUFACTURE

Title:

DIAMOND SINTERED BODY AND ITS MANUFACTURE AS WELL AS CATALYST USED AT THE TIME OF THE MANUFACTURE

Document Type and Number:

Japanese Patent JPH05320812

Kind Code:

A

Abstract:

PURPOSE: To obtain a diamond sintered body of high quality by using an amorphous alloy as a catalyst, bringing the alloy having a catalytic compsn. into contact with diamond powder and executing sintering under specified conditions.

CONSTITUTION: An amorphous alloy essentially consisting of Co and/or Fe and contg. at least one kind selected from Si, B and P is used as a catalyst. The alloy having the catalytic compsn. is brought into contact with diamond powder in the state of lumps, and by using a superhigh pressure and high temp. apparatus, they are heated to ≥1050°C under a superhigh pressure of ≥4.5GPa and are sintered. In this way, the sintering pressure can be reduced by about 20% compared to that in the conventional one without deteriorating the quality of the diamond sintered body compared to that of the conventional one.

Inventors:

KOSHIHAMA TETSUO
YOSHIMOTO TAKASHI
NAKANO KIMIHIRO
UEDA TAMOTSU

Application Number:

JP2598593A

Publication Date:

December 07, 1993

Filing Date:

January 22, 1993

Export Citation:

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Assignee:

NACHI FUJIKOSHI CORP

International Classes:

C04B35/52; C22C26/00; (IPC1-7): C22C26/00; C04B35/52

Attorney, Agent or Firm:

Junji Kawauchi

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