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Title: Ternary ceramic alloys of ZR-CE-HF oxides

Abstract

A ternary ceramic alloy which produces toughening of zirconia and zirconia composites through the stress transformation from tetragonal phase to monoclinic phase. This alloy, having the general formula Ce.sub.x Hf.sub.y Zn.sub.1-x-y O.sub.2, is produced through the addition of appropriate amounts of ceria and hafnia to the zirconia. Typically, improved toughness is achieved with about 5 to about 15 mol % ceria and up to about 40 mol % hafnia. The preparation of alloys of these compositions are given together with data as to the densities, tetragonal phase content, hardness and fracture toughness. The alloys are useful in preparing zirconia bodies as well as reinforcing ceramic composites.

Inventors:
 [1];  [2]
  1. (Oak Ridge, TN)
  2. (White Bear Lake, MN)
Issue Date:
Research Org.:
LOCKHEED MARTIN ENRGY SYST INC
OSTI Identifier:
867613
Patent Number(s):
4971933
Assignee:
Martin Marietta Energy Systems, Inc. (Oak Ridge, TN) ORNL
DOE Contract Number:  
AC05-84OR21400
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
ternary; ceramic; alloys; zr-ce-hf; oxides; alloy; produces; toughening; zirconia; composites; stress; transformation; tetragonal; phase; monoclinic; formula; hf; zn; 1-x-y; produced; addition; appropriate; amounts; ceria; hafnia; typically; improved; toughness; achieved; 15; mol; 40; preparation; compositions; data; densities; content; hardness; fracture; useful; preparing; bodies; reinforcing; ceramic composites; ceramic composite; fracture toughness; tetragonal phase; monoclinic phase; improved toughness; ternary ceramic; ceramic alloy; zirconia composite; /501/

Citation Formats

Becher, Paul F., and Funkenbusch, Eric F. Ternary ceramic alloys of ZR-CE-HF oxides. United States: N. p., 1990. Web.
Becher, Paul F., & Funkenbusch, Eric F. Ternary ceramic alloys of ZR-CE-HF oxides. United States.
Becher, Paul F., and Funkenbusch, Eric F. Mon . "Ternary ceramic alloys of ZR-CE-HF oxides". United States. https://www.osti.gov/servlets/purl/867613.
@article{osti_867613,
title = {Ternary ceramic alloys of ZR-CE-HF oxides},
author = {Becher, Paul F. and Funkenbusch, Eric F.},
abstractNote = {A ternary ceramic alloy which produces toughening of zirconia and zirconia composites through the stress transformation from tetragonal phase to monoclinic phase. This alloy, having the general formula Ce.sub.x Hf.sub.y Zn.sub.1-x-y O.sub.2, is produced through the addition of appropriate amounts of ceria and hafnia to the zirconia. Typically, improved toughness is achieved with about 5 to about 15 mol % ceria and up to about 40 mol % hafnia. The preparation of alloys of these compositions are given together with data as to the densities, tetragonal phase content, hardness and fracture toughness. The alloys are useful in preparing zirconia bodies as well as reinforcing ceramic composites.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1990},
month = {1}
}

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