The phase diagram of the Al₂O₃-ZrO₂-Sm₂O₃ system. IV. Polythermal sections of the phase diagram

详细信息    查看全文

• 作者：S. M. Lakiza ; V. P. Red¡¯ko and L. M. Lopato
• 关键词：zirconium dioxide ; aluminum oxide ; samarium oxide ; phase diagram ; polythermal section ; eutectic material
• 刊名：Powder Metallurgy and Metal Ceramics
• 出版年：2006
• 出版时间：July, 2006
• 年：2006
• 卷：45
• 期：7-8
• 页码：353-360
• 全文大小：131 KB

文摘

Three polythermal sections have been constructed to give a fuller description of the phase diagram structure for the Al₂O₃-ZrO₂-Sm₂O₃ system over wide ranges in temperature and concentration, which indicate the interactions in the ternary system. The bisector of the angle Sm₂O₃-(50 mole % Al₂O₃-50 mole % ZrO₂) indicate the structure of the phase diagram in the region rich in Sm₂O₃, and also the mechanisms of the phase transformations of solid solutions based on Sm₂O₃: X ⇔ H ⇔ A ⇔ B. The 20 mole % ZrO₂ isoconcentrate (20Z) indicates the phase diagram structure in the region adjoining the binary bounding system Al₂O₃-Sm₂O₃. The 40 mole % isoconcentrate (40Z) describes the phase diagram in regions rich in ZrO₂ as well as the mechanism for the solid-solution phase transformation F ⇔ T based on ZrO₂. These sections intersect three nominally quasibinary sections in the ternary system and indicate the dynamic of the width change in the two-phase regions.