Mullite ceramic whisker composite article exhibiting high-temper

Details Mullite ceramic whisker composite article exhibiting high-temper Mullite ceramic whisker composite article exhibiting high-temper

1987-09-28

1988-09-27

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Carbide or oxycarbide containing

501 95, 501105, C04B 3556, C04B 3548

Patent

active

047742097

ABSTRACT:
Whisker-reinforced zirconia-mullite ceramic articles exhibiting excellent high-temperature modulus of rupture strength and good toughness are provided from batches comprising the free oxides ZrO.sub.2, SiO.sub.2 and Al.sub.2 O.sub.3 in combination with SiC whiskers for reinforcement. Due to the fine oxide particle sizes attainable and the fact that the mullite is formed in situ in the consolidation process, dense, whisker-reinforced mullite composite articles exhibiting excellent high-temperature strength and toughness may conveniently be obtained.

REFERENCES:
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patent: 4421861 (1983-12-01), Claussen et al.
patent: 4519359 (1985-05-01), Dworek et al.
patent: 4543345 (1985-09-01), Wei
patent: 4657877 (1987-04-01), Becher
Boch et al., "Preparation and Properties of Reaction-Sintered Mullite Ceramics," Mat'l. Sci. Eng., 71 (1985) 39-48.
Prochazka et al., "Microstructure of Sintered Mullite-Zirconia Composites," Communications Am. Cer. Soc. (Aug. 1983) C125-127.
Claussen et al., "Mechanical Properties of Sintered, In Situ-Reacted Mullite-Zirconia Composites," J. Am. Cer. Soc., 63(3-4)228-9.
Claussen et al., "Whisker-Reinforced Oxide Ceramics," Journal de Physique, Colloque C1, supplement 2, vol. 47, Feb. 1986, pp. C1693-C1702.
P. F. Becher et al., "Toughening of Ceramics by Whisker Reinforcement," Fracture Mechanics of Ceramics, vol. 7, (Plenum Press, 1986) pp. 61-73.

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