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

Patent · 01 January 1987

OSTI ID:866164

Singh, Jitendra P ^[1]; James, Jawana J ^[2]; Picciolo, John J ^[3]

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1. Bolingbrook, IL
2. West Lafayette, IN
3. Lockport, IL

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.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4647547
• OSTI ID: 866164
• Country of Publication: United States
• Language: English

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