Glassy formability and structural variation of Zr50-xCu50Al[x] (x = 0~25) alloys with respect to icosahedral short-range ordering
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- Xu Yong
- State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing
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- Chen Guoliang
- State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing
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- Zhang Yong
- State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing
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- Tang Fangli
- State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing
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- Liu Xiongjun
- State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing
書誌事項
- タイトル別名
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- Glassy Formability and Structural Variation of Zr<SUB>50−<I>x</I></SUB>Cu<SUB>50</SUB>Al<I><SUB>x</SUB></I> (<I>x</I>=0∼25) Alloys with Respect to Icosahedral Short-Range Ordering
- Glassy Formability and Structural Variation of Zr<SUB>50−<I>x</I></SUB>Cu<SUB>50</SUB>Al<I><SUB>x</SUB></I> (<I>x</I>=0∼25) Alloys with Respect to Icosahedral Short-Range Ordering
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説明
In this study, effects of Al addition on the glass-forming ability, phase evolution, and structural variation of Zr50−xCu50Alx (x=0∼25) alloys are investigated by means of X-ray diffraction and scanning electron microscopy. The phase type and structure of the Zr-Cu-Al alloys strongly depend on the Al content. The main phases of the Zr45Cu50Al5 alloy are CuZr and icosahedral phase when the casting size is between 5 mm and 10 mm, but change to CuZr + glassy phase when the casting diameter is decreased to 3 mm. The intensity and number of Bragg peaks corresponding to the icosahedral phase in the Zr45Cu50Al5 alloy decrease quickly as the cooling rate increases, and finally, only a diffuse peak is seen. These results suggest that there is strong correlation between the icosahedral phase and the glassy phase in the Zr-Cu-Al alloys during rapid solidification. The structure of the glassy phase in the Zr-Cu-Al alloys shows icosahedral short-range ordering. The icosahedron with five-fold symmetry is incompatible with lattice periodicity, which presents a barrier to crystallization and improves the glassy formability.
収録刊行物
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 51 (7), 1178-1182, 2010
公益社団法人 日本金属学会
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詳細情報 詳細情報について
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- CRID
- 1390282679226940672
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- NII論文ID
- 10027018462
- 130004454498
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- NII書誌ID
- AA1151294X
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- ISSN
- 13475320
- 13459678
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- NDL書誌ID
- 10735677
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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- 使用不可