Formation of the icosahedral quasicrystalline phase in a rapidly solidified Al{sub 52}Cu{sub 25.5}Fe{sub 12.5}Si{sub 1} alloy

Journal Article · Sat Apr 15 00:00:00 EDT 2006 · Materials Characterization

DOI:https://doi.org/10.1016/j.matchar.2005.11.008· OSTI ID:20833196

Yan, Wang ^[1]; Zhonghua, Zhang ^[2]; Haoran, Geng ^[1]; Zhongxi, Yang ^[1]

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1. School of Materials Science and Engineering, Jinan University, 106 Jiwei Road, Jinan 250022 (China)
2. Key Laboratory of Liquid Structure and Heredity of Materials, Ministry of Education, Shandong University, 73 Jingshi Road, Jinan 250061 (China)

In the present work, the effect of wheel speed (quenching rate) on the formation of the quasicrystalline phase in a rapidly solidified Al{sub 52}Cu{sub 25.5}Fe{sub 12.5}Si{sub 1} alloy has been investigated using X-ray diffraction (XRD), differential thermal analysis (DTA), differential scanning calorimetry (DSC) and transmission electron microscopy (TEM). The results show that rapid solidification has no effect on the phase constitution of the Al{sub 52}Cu{sub 25.5}Fe{sub 12.5}Si{sub 1} alloy. The addition of Si decreases the stability of the quasicrystalline phase in the conventionally cast Al{sub 52}Cu{sub 25.5}Fe{sub 12.5}Si{sub 1} alloy. The thermal stability of the quasicrystalline phase in the melt-spun alloy depends upon the quenching rate. Moderate-rate rapid solidification can improve the thermal stability of the quasicrystalline phase in the melt-spun alloy. Higher quenching rate instigates the transformation of the quasicrystalline phase into the cubic approximant phase and decreases the stability of the quasicrystalline phase. Furthermore, the transformation temperature decreases with increasing Si addition into the Al{sub (62-x)}Cu{sub 25.5}Fe{sub 12.5}Si{sub x}.

• OSTI ID: 20833196
• Journal Information: Materials Characterization, Vol. 56, Issue 3; Other Information: DOI: 10.1016/j.matchar.2005.11.008; PII: S1044-5803(05)00257-3; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 1044-5803
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
CALORIMETRY
COPPER ALLOYS
DIFFERENTIAL THERMAL ANALYSIS
IRON ALLOYS
QUENCHING
SILICON ALLOYS
SOLIDIFICATION
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION