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Title: High temperature refractory of MgCr.sub.2 O.sub.4 matrix and unstabilized ZrO.sub.2 particles

Abstract

A high chromia refractory composite has been developed with improved thermal shock resistance and containing about 5-30 wt. % of unstabilized ZrO.sub.2 having a temperature-dependent phase change resulting in large expansion mismatch between the ZrO.sub.2 and the chromia matrix which causes microcracks to form during cooling in the high chromia matrix. The particle size preferably is primarily between about 0.6-5 microns and particularly below about 3 microns with an average size in the order of 1.2-1.8 microns.

Inventors:
 [1];  [2];  [3]
+ Show Inventor Affiliations
  1. Bolingbrook, IL
  2. West Lafayette, IN
  3. Lockport, IL
Issue Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL (United States)
OSTI Identifier:
866164
Patent Number(s):
4647547
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Classifications (CPCs):
C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
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DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
temperature; refractory; mgcr; matrix; unstabilized; zro; particles; chromia; composite; developed; improved; thermal; shock; resistance; containing; 5-30; wt; temperature-dependent; phase; change; resulting; expansion; mismatch; causes; microcracks; form; cooling; particle; size; preferably; primarily; 6-5; microns; particularly; below; average; 2-1; shock resistance; improved thermal; thermal shock; phase change; particle size; average size; refractory composite; unstabilized zro; temperature refractory; /501/

Citation Formats

Singh, Jitendra P, James, Jawana J, and Picciolo, John J. High temperature refractory of MgCr.sub.2 O.sub.4 matrix and unstabilized ZrO.sub.2 particles. United States: N. p., 1987. Web.
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Singh, Jitendra P, James, Jawana J, & Picciolo, John J. High temperature refractory of MgCr.sub.2 O.sub.4 matrix and unstabilized ZrO.sub.2 particles. United States.
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Singh, Jitendra P, James, Jawana J, and Picciolo, John J. Thu . "High temperature refractory of MgCr.sub.2 O.sub.4 matrix and unstabilized ZrO.sub.2 particles". United States. https://www.osti.gov/servlets/purl/866164.
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@article{osti_866164,
title = {High temperature refractory of MgCr.sub.2 O.sub.4 matrix and unstabilized ZrO.sub.2 particles},
author = {Singh, Jitendra P and James, Jawana J and Picciolo, John J},
abstractNote = {A high chromia refractory composite has been developed with improved thermal shock resistance and containing about 5-30 wt. % of unstabilized ZrO.sub.2 having a temperature-dependent phase change resulting in large expansion mismatch between the ZrO.sub.2 and the chromia matrix which causes microcracks to form during cooling in the high chromia matrix. The particle size preferably is primarily between about 0.6-5 microns and particularly below about 3 microns with an average size in the order of 1.2-1.8 microns.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {1}
}
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