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ON THE DESTABILIZATION OF THE CUBIC FORM OF ZIRCONIUM DIOXIDE (in Russian)

Journal Article · · Doklady Akad. Nauk S.S.S.R.
OSTI ID:4300360
;

Specimens of zirconium dioxide were stabilized with 10to 30 mole % CaO and 14to 35 mole% MgO. The stabilization was made in the arc furnace and by a ceramic sintering of fine powdered mixtures at 1750 C for 6 hr. Petrographic and x-ray investigations showed that both melted and sintered zirconium dioxide have cubic structures. Phase constitutions of stabilized specimens of ZrO/sub 2/ after sintening for 50 hr at 1200 C are tabulated. Data indicate that the decomposition rate of hard solutions of CaO- ZrO/sub 2/ and MgO-ZrO/sub 2/ depends on the content of the admixture and the concentration of solid solution. The solid solutions in the CaO- ZrO/sub 2/ system have higher stability than the MgO- ZrO/sub 2/ system. The studies indicate the complex mechanism of solid solution decomposition and the importance of further investigations. (R.V.J.)

Research Organization:
All-Union Scientific-Research Inst. of Refractory Materials
NSA Number:
NSA-13-000222
OSTI ID:
4300360
Journal Information:
Doklady Akad. Nauk S.S.S.R., Journal Name: Doklady Akad. Nauk S.S.S.R. Vol. Vol: 121
Country of Publication:
Country unknown/Code not available
Language:
Russian

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Related Subjects

CALCIUM OXIDES
ELECTRIC ARCS
HIGH TEMPERATURE
LATTICES
MAGNESIUM OXIDES
MELTING
METALLURGY AND CERAMICS
PHASE DIAGRAMS
SINTERING
SOLID SOLUTIONS
STABILITY
ZIRCONIUM OXIDES