Morphology and the structure of quasicrystal phase in as-cast and melt-spun Mg-Zn-Y-Zr alloys

Journal Article · Fri Oct 01 04:00:00 EDT 1993 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(93)90388-9· OSTI ID:6256052

Tang, Y L; Zhao, D S; Shen, N F ^[1]; Luo, Z P; Zhang, S Q ^[2]

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1. Zhengzhou Inst. of Technology (China). Research Center for Materials
2. Inst. of Aeronautical Materials, Beijing (China)

During recent years, many researchers have investigated the experimental and theoretical aspects of quasicrystal materials. In some Mg alloys (Mg[sub 32]Al[sub 17]Zn[sub 32], Mg[sub 32](Al,Zn)[sub 49], Mg[sub 32] (Al,Zn,Cu)[sub 49], Mg[sub 4]CuAl[sub 6] and Ga[sub 16]Mg[sub 32]Zn[sub 52]), icosahedral quasicrystals (IQC) have been found. However, most of the quasicrystals in these alloys were formed under a rapid solidification condition. In the recent study on Mg-Zn-(Zr,Y) as-cast alloys, the authors identified a new Mg-rich and a Zn-rich IQC by X-ray diffraction (XRD) and electron microscopy (EM). The discovery of Mg-Zn-Y IQC is of interest because it formed in an as-cast ingot and did not contain the element Al, which is the major constituent of nearly all IQC forming alloys reported. Also, analyses on IQC in as-cast and RS Mg alloys with the composition have not previously been carried out. In this paper, TEM and XRD investigations were completed on IQC formed in a Mg-Zn-Y-Zr cast ingot and melt-spun ribbons for microstructure comparison.

• OSTI ID: 6256052
• Journal Information: Scripta Metallurgica et Materialia; (United States), Journal Name: Scripta Metallurgica et Materialia; (United States) Vol. 29:7; ISSN 0956-716X; ISSN SCRMEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ALLOYS
MAGNESIUM ALLOYS
MICROSTRUCTURE
PHASE STUDIES
YTTRIUM ALLOYS
ZINC ALLOYS
ZIRCONIUM ALLOYS