Acta Metall Sin  2008, Vol. 44 Issue (2): 227-232     DOI:

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AMORPHOUS PHASE FORMATION AND MICROSTRUCTURE CHARACTERIZATION IN THE Al-RICH REGION OF Al-Co-Y SYSTEM

Pan Dong;Jia Zhang;Xinchun Chang;Wanliang Hou;Minxiu Quan;Jianqiang Wang

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Pan Dong; Jia Zhang; Xinchun Chang; Wanliang Hou; Minxiu Quan; Jianqiang Wang. AMORPHOUS PHASE FORMATION AND MICROSTRUCTURE CHARACTERIZATION IN THE Al-RICH REGION OF Al-Co-Y SYSTEM. Acta Metall Sin, 2008, 44(2): 227-232 .

Abstract References Related Articles Recommended Metrics Download:  PDF(420KB)  Export:  BibTeX | EndNote (RIS)       Abstract  Al85Ni5Y8Co2 has the highest glass forming ability in Al-based amorphous alloys to date. To locate the optimum composition in its basic system is of great importance for preparing Al-based bulk metallic glass. Al-Co-Y system has not been studied thoroughly as yet. In this work, it is indicated that Al88Co5Y7 is the best alloy and its critical thickness is up to 230 μm. The glass forming ability shows a strong dependence on composition in this system. Surprisingly, there is no obvious glass transition phenomenon upon heating in the best glass formation alloy. Compared with Trg and ΔTx criteria, phase selection method is proved to be effective to locate the optimum alloy and characterize the glass forming ability dependence on composition in this system. It is fcc-Al, Al3Y and Al9Co2 that compete with amorphous phase during its formation. Key words:  Al-based amorphous alloy      glass forming ability      microstructure evolution       Received:  09 May 2007      Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors Pan Dong Jia Zhang Xinchun Chang Wanliang Hou Minxiu Quan Jianqiang Wang URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y2008/V44/I2/227 [1]Ohtera K,Inoue A,Terabayashi T,Nagahama H,Ma- sumoto T.Mater Trans JIM,1992;33:775 [2]Inoue A,Sobu S,Louzguine D V,Kimura H,Sasamori K. 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