Composite powder and method of manufacturing sintered body there

Details Composite powder and method of manufacturing sintered body there Composite powder and method of manufacturing sintered body there

1997-05-16

1999-06-15

Group, Karl

Compositions: ceramic

Ceramic compositions

Carbide or oxycarbide containing

501 971, 501 972, 501 974, 264122, 264125, 264647, C04B 35565, C04B 35584, B28B 300

Patent

active

059122005

ABSTRACT:
A composite powder having a specific surface area of 7 m.sup.2 /g or more is produced by mixing a silicon powder with a carbonaceous powder and a sintering aid powder, and heat-treating the resultant mixed powder in a nitrogen-containing atmosphere at a temperature of 1,450.degree. C. or lower thereby nitriding and carbonizing silicon in the mixed powder. The temperature elevation speed in the heat treatment for nitriding and carbonizing is less than 2.degree. C./minute at least in a range from a temperature at which the nitriding and carbonizing of silicon starts to take place to a temperature at which the composite powder is kept for nitriding and carbonizing of silicon. The composite sintered body is produced by sintering such a composite powder at a temperature of 1,600.degree. C. to 2,200.degree. C.

REFERENCES:
patent: 5767025 (1998-06-01), Miyake et al.

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