Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Particulate matter
Patent
1980-06-10
1982-06-08
Meros, Edward J.
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Particulate matter
51309, 72467, 76107A, 252503, 423446, 428408, B22B 900, C01B 3106
Patent
active
043339867
ABSTRACT:
The invention relates to a diamond sintered compact wherein diamond crystal particles are uniformly oriented in a particular direction and the method for producing the same, and has for an object to provide a diamond sintered compact having a high thermal conductivity particularly suitable for heat sink for use in the field of electronics.
According to the invention, graphite is used as carbonaceous raw material, diamond crystal particles having such elongated shape that the ratio of the length of the long axis to that of the short axis is more than 2 being synthesized in such state that the greater part of the crystal particles have their long axes uniformly oriented in a particular direction, the crystal particles being sintered in the direction of the long axes thereof so that transformation of the graphite into diamond and sintering thereof may be accomplished synchronously. The invention has for an object to obtain a diamond sintered compact suitable for the aforesaid use by degassing reaction system raw material plugged into an air permeable container by heating it in vacuum in order to intercept gaseous components causing a decrease of thermal conductivity at the time of synthesizing diamond from carbonaceous material and a catalytic metal and sintering thereof, subsequently the air permeable part of the said container being sealed by means of soldering material preliminarily placed in contact with the said container.
REFERENCES:
patent: 2992900 (1961-07-01), Bovenkerk
patent: 3407445 (1968-10-01), Strong
patent: 3829544 (1974-08-01), Hall
patent: 3949062 (1976-04-01), Vereschagin et al.
patent: 4049783 (1977-09-01), Vereschagin et al.
patent: 4104441 (1978-08-01), Fedoseev et al.
Hara Akio
Tsuji Kazuo
Yazu Shuji
Meros Edward J.
Sumitomo Electric Industries Ltd.
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