Whisker-reinforced ceramic cutting tool material

Details Whisker-reinforced ceramic cutting tool material Whisker-reinforced ceramic cutting tool material

1992-04-07

1993-07-27

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Carbide or oxycarbide containing

51309, C04B 3510

Patent

active

052310604

ABSTRACT:
The present invention relates to a ceramic whisker-containing cutting insert for chipforming machining of steel having improved mechanical, thermal and wearing properties.
Besides an oxide-based matrix, the material contains 5-50, preferably 10-40, % by volume of homogeneously distributed whiskers or platelets of nitrides, carbides and/or borides of metals from group IVB (Ti, Zr or Hf) and/or VB (V, Nb or Ta) in the periodic system (or solid solutions thereof) having a linear expansion coefficient being lower than that of Al.sub.2 O.sub.3, preferably at the most 85% of that for Al.sub.2 O.sub.3 measured at 300-1300K. The properties of the composite material can be further modified by coating the whisker material with thin layers. The whisker reinforced cutting tool material shows an improved toughness behavior.

REFERENCES:
patent: 4366254 (1982-12-01), Rich et al.
patent: 4745091 (1988-05-01), Landingham
patent: 4804645 (1989-02-01), Ekstrom
patent: 4820663 (1989-04-01), Mehrotra et al.
patent: 4844848 (1989-07-01), Clark et al.
patent: 4852999 (1989-08-01), Mehrotra et al.
patent: 4867761 (1989-09-01), Brandt et al.
patent: 4925458 (1990-05-01), Mehrotra et al.
patent: 4956315 (1990-09-01), Mehrotra et al.
World Patents Index Latest Week 8836, Derwent Publications Ltd., London, Great Britain; AN 88-254400 & JP-A-63 185 869; (Toshiba Tungalloy KK), 1 Aug. 1988; abstract.
World Patents Index Latest Week 8848; Derwent Publications Ltd.; London, Gread Britain; AN88-341446 & JP-A-63 252 960; (Sumitomo Elec Ind KK), 20 Oct. 1988; abstract.
H. Scholtze et al, "Keramik, Teil 2: Keramische Werkstoffe", 1983, Springer-Verlag, Berlin, Table 7.1.

Affiliated with

Also associated with

Rating

Whisker-reinforced ceramic cutting tool material does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Whisker-reinforced ceramic cutting tool material, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Whisker-reinforced ceramic cutting tool material will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2342214