Sintered member of aluminum nitride base reinforced composite ma

Details Sintered member of aluminum nitride base reinforced composite ma Sintered member of aluminum nitride base reinforced composite ma

1986-09-12

1988-10-11

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Carbide or oxycarbide containing

501 88, 501 89, 501 92, 501 96, 51307, 51308, 51309, C04B 3556, C04B 3558, C04B 3580

Patent

active

047771550

ABSTRACT:
The disclosure relates to a sintered aluminum nitride base composite material which consists essentially of 5-50 wt % of SiC whiskers, 0.5-10 wt % of sintering assistant(s) selected from SiO.sub.2, Y.sub.2 O.sub.3, CaO, Al.sub.2 O.sub.3, Mo, W, Mo.sub.2 C, WC and oxides of elements of the lanthanide series and the balance of AlN. By virtue of dispersion of SiC whiskers in AlN base ceramic matrix the sintered material is very enhanced in strength, toughness and hardness and exhibits increased heat conductivity. The sintered material provides excellent cutting tools since Rockwell superficial hardness, 45N scale, can be made higher than 85.

REFERENCES:
patent: 4539298 (1985-09-01), Komeya et al.
patent: 4543345 (1985-09-01), Wei
patent: 4585500 (1986-04-01), Minjolle et al.
patent: 4591537 (1986-05-01), Aldinger et al.
patent: 4650777 (1987-03-01), Kurokawa et al.

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