Replacement with Each Other of Ti and Zr in the Intermetallics of Al-(Si-)Ti-Zr Alloys  

作　　者：Tong Gao Xiangfa Liu 

机构地区：[1]Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials,Ministry of Education,Shandong University

出　　处：《Journal of Materials Science & Technology》2013年第3期291-296,共6页材料科学技术（英文版）

基　　金：supported by the National Basic Research Program of China(973 Program,No. 2012CB825702);the National Natural Science Foundation of China(No.51071097)

摘　　要：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 AI-Si-Zr alloys, due to the distortion of crystal structure caused by the replacement of Ti and Zr.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 AI-Si-Zr alloys, due to the distortion of crystal structure caused by the replacement of Ti and Zr.

关 键 词：REPLACEMENT Composition Lattice parameters MICROHARDNESS 

分 类 号：TG146.21[一般工业技术—材料科学与工程]