Antonelli, Terry, Stout & Kraus
Carbon coated silicon carbide, silicon nitride or sialon fibers in a ceramic matrix
 The present invention provides fiber-reinforced ceramics containing at least one member of fibers and whiskers as distributed in a sintering ceramic matrix, which comprises the ceramic matrix being composed mainly of SiC, Si.sub.3 N.sub.4 and Si.sub.6-z Al.sub.z O.sub.z N.sub.8-z, where 0<z.ltoreq.4, the fibers and the whiskers being composed of at least one of SiC, Si.sub.3 N.sub.4 and Si.sub.6-z Al.sub.z O.sub.z N.sub.8-z, where 0<z.ltoreq.4, and a coating film of C, B or BN being provided on the surfaces of the fibers and the whiskers. The fiber-reinforced ceramics have a high fracture toughness, K.sub.lc, and a high bending strength, particularly k.sub.lc of at least 10 MN/m.sup.3/2 and a bending strength of at least 50 kg/mm.sup.2. 
Hitachi, Ltd.
C C C C F C C C F C C C C C C C C Y Y C C C C C Y C C C C C C C C Y C C C C F C C C Y C C C F Y Y
C04B C04B C04B C04B F05D C04B C04B C04B F01D C04B C04B C04B C04B C04B C04B C04B C04B Y10T Y10T C04B C04B C04B C04B C04B Y10T C04B C04B C04B C04B C04B C04B C04B C04B Y10T C04B C04B C04B C04B F05D C04B C04B C04B Y10S C04B C04B C04B F05D Y10T Y10T
additional inventional additional inventional additional inventional additional inventional inventional inventional additional additional additional inventional additional inventional inventional additional additional inventional additional additional inventional additional additional inventional additional additional additional additional additional additional additional additional inventional additional additional additional additional inventional additional additional additional inventional additional inventional additional additional additional
Hiroshi Tadahiko
Sakamoto Miyoshi