Ceramics containing dispersants for improved fracture toughness

Compositions: ceramic – Ceramic compositions – Refractory

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

501104, 501105, 501108, 501127, 501134, 501153, C04B 3510, C04B 3504, C04B 3518, C04B 3550

Patent

active

H00003026

ABSTRACT:
The invention is a ceramic composition containing a new class of dispersant for hindering crack propagation by means of one or more energy-dissipative mechanisms. The composition is composed of a ceramic matrix with dispersed particles of a transformation-prone rare-earth niobate, tantalate or mixtures of these with each other and/or with a rare-earth vanadate. The dispersants, having a generic composition tRMO.sub.4, where R is a rare-earth element, B is Nb or Ta and O is oxygen, are mixed in powder form with a powder of the matrix ceramic and sintered to produce a ceramic form or body. The crack-hindering mechanisms operates to provide improved performance over a wide range of temperature and operating conditions.

REFERENCES:
patent: 2040215 (1936-05-01), Rava
patent: 3287143 (1966-11-01), Yavorsky
patent: 4303447 (1981-12-01), Buchanan et al.
patent: 4406699 (1983-09-01), Beck et al.
patent: 4507394 (1985-03-01), Mase et al.
Stevens and Evans, "Transformation Toughening by Dispersed Polycrystalline Zirconia", Br. Ceram. Trans. J., 83, 28-31 (1984).

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Ceramics containing dispersants for improved fracture toughness does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ceramics containing dispersants for improved fracture toughness, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ceramics containing dispersants for improved fracture toughness will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1654431

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.