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J. Mater. Sci. Technol.  2013, Vol. 29 Issue (3): 291-296    DOI: 10.1016/j.jmst.2013.01.018
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Replacement with Each Other of Ti and Zr in the Intermetallics of Al-(Si-) Ti-Zr Alloys
Tong Gao, Xiangfa Liu
Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China
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The structures and compositions of Ti and Zr rich phases in ternary Al-Ti-Zr and quaternary Al-Si-Ti-Zr systems were investigated by energy dispersive spectroscopy and X-ray diffraction. The additions of Ti and Zr were changed. It was found that Ti and Zr can replace each other in the Ti and Zr rich phases of Al-(Si-)Ti-Zr alloys. Compositions of the phases have been measured as a function of Ti and Zr additions. The content of Ti (Zr) in the phases increases with its addition in the alloys. Besides, the increase of Ti content can result in a decrease of lattice parameters. Microhardness of the phases in Al-18Si-xTi-yZr alloys changes with composition evolution. Moreover, the microhardness is higher than that of the intermetallics of ternary Al-Si-Ti and Al-Si-Zr alloys, due to the distortion of crystal structure caused by the replacement of Ti and Zr.

Key wordsReplacement      Composition      Lattice parameters      Microhardness     
Received: 08 May 2012      Published: 19 March 2013

National Basic Research Program of China (973 Program, No. 2012CB825702) and the National Natural Science Foundation of China (No. 51071097).

Corresponding Authors: Xiangfa Liu     E-mail: x?

Cite this article:

Tong Gao, Xiangfa Liu. Replacement with Each Other of Ti and Zr in the Intermetallics of Al-(Si-) Ti-Zr Alloys. J. Mater. Sci. Technol., 2013, 29(3): 291-296.

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