Phase Diagrams of Refractory Oxide Systems and Microstructural Design of Materials

It is shown that the phase diagrams of refractory oxide systems based on ZrO 2 , HfO 2 , Al 2 O 3 , and rare earth oxides underlie the microstructural design of various high-performance materials. Process steps to produce coarse-grained ceramics in the HfO 2 –ZrO 2 –Y 2 O 3 , ZrO 2 –Y 2 O 3 –Sc 2 O...

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Bibliographic Details
Published in:Powder metallurgy and metal ceramics 2014-09, Vol.53 (5-6), p.303-311
Main Authors: Dudnik, E. V., Lakiza, S. N., Tishchenko, Ya. S., Ruban, A. K., Red’ko, V. P., Shevchenko, A. V., Lopato, L. M.
Format: Article
Language:English
Subjects:
Ceramic materials
Ceramics
Characterization and Evaluation of Materials
Chemistry and Materials Science
Composites
Glass
Materials Science
Metallic Materials
Natural Materials
Oxides
Physicochemical Materials Research
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Summary:It is shown that the phase diagrams of refractory oxide systems based on ZrO 2 , HfO 2 , Al 2 O 3 , and rare earth oxides underlie the microstructural design of various high-performance materials. Process steps to produce coarse-grained ceramics in the HfO 2 –ZrO 2 –Y 2 O 3 , ZrO 2 –Y 2 O 3 –Sc 2 O 3 , HfO 2 –ZrO 2 –Sc 2 O 3 , Y 2 O 3 –Er 2 O 3 , Y 2 O 3 –ZrO 2 , Y 2 O 3 –HfO 2 , Y 2 O 3 –Al 2 O 3 , Y 2 O 3 –SiO 2 , and Y 2 O 3 –La 2 O 3 systems to perform at temperatures up to 2200°C are designed. Process steps to produce high-performance fine-grained composites in the HfO 2 –ZrO 2 –Y 2 O 3 (Ln 2 O 3 ) (Ln–Dy, Ho, Er, Tm, Yb), ZrO 2 –Y 2 O 3 –Sc 2 O 3 , ZrO 2 –Y 2 O 3 –Sc 2 O 3 , Al 2 O 3 –Zr(Hf)O 2 –Ln(Y) 2 O 3 (Ln–La, Nd, Sm, Gd, Er, Yb), and ZrO 2 –Y 2 O 3 –CeO 2 –Al 2 O 3 systems are designed as well.
ISSN:1068-1302
1573-9066
DOI:10.1007/s11106-014-9617-z