Accession Number : AD0693820

Title :   STRENGTH PROPERTIES OF ZIRCONIUM DIOXIDE REFRACTORIES BASED ON A GRANULAR MASS AT TEMPERATURES UP TO 2500K,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Grebenyuk,A. A. ; Karaulov,A. G. ; Mayauskas,I. S. ; Peras,A. Ya.

Report Date : 20 MAY 1969

Pagination or Media Count : 14

Abstract : The influence of the monoclinic phase on the strength of zirconium oxide was tested in a special high-temperature unit. It was shown that under room temperature conditions, the increase in the content of monoclinic phase impaired the strength characteristics of refractories. This phenomenon is caused by the structure of samples in which the monoclinic phase is characterized by a great number of cracks whose size and density increase with the monoclinic phase. At high temperatures the increase in the monoclinic phase has a positive influence on the strength characteristics of the material, caused by decreasing the amount of CaO in the material and a corresponding increase in refractoriness. An increase in the strength of the material was observed at temperatures above 2300 degrees K. (Author)

Descriptors :   (*REFRACTORY MATERIALS, ZIRCONIUM OXIDES), (*ZIRCONIUM OXIDES, MECHANICAL PROPERTIES), CRYSTAL STRUCTURE, THERMAL STABILITY, DEGRADATION, USSR

Subject Categories : Ceramics, Refractories and Glass

Distribution Statement : APPROVED FOR PUBLIC RELEASE