Formation of quasicrystalline phase in rapidly solidified Al[sub 23]CuFe[sub 4]

Journal Article · Fri Apr 15 04:00:00 EDT 1994 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(94)90558-4· OSTI ID:5264619

Dey, G K; Savalia, R T; Banerjee, S ^[1]; Prakash, D ^[2]; Mandal, R K ^[3]

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1. Bhabha Atomic Research Centre, Bombay (India). Metallurgy Div.
2. Bhabha Atomic Research Centre, New Bombay (India). Powder Metallurgy Div.
3. Banaras Hindu Univ., Varanasi (India). School of Materials Science and Technology

Since the observation of an icosahedral phase in Al-Mn, by Shechtman et al., a large number of alloy systems have been identified, where quasicrystals of different types can be obtained after rapid solidification. Of late, the existence of the icosahedral phase in Al[sub 65]Cu[sub 20]Fe[sub 15] has drawn considerable attention, because of the stable nature of the quasicrystalline phase in this alloy, and the fact that these quasicrystals have abnormally low phasonic strains. In the continuous endeavor of finding new alloy compositions, where quasicrystals can be obtained, some guidelines for identifying quasicrystal forming alloys have emerged. One of these guidelines is the equilibrium crystalline structure of the alloy, presence of icosahedral clusters in the equilibrium crystalline state being a positive indication that a particular alloy may yield quasicrystals on rapid solidification. Similarity of structure of the potential quasicrystal forming alloy, with those alloys, where formation of quasicrystal is already established is another way of arriving at new quasicrystal forming alloys. With this point in view, the alloy Al[sub 23]CuFe[sub 4] was chosen for exploring the possibility of quasicrystal formation on rapid solidification. The equilibrium Al[sub 23]CuFe[sub 4] phase is isostructural, with Al[sub 6]Mn. The microstructure of this alloy has been examined after rapid solidification to ascertain the nature and morphology of the quasicrystalline and crystalline phases.

• OSTI ID: 5264619
• Journal Information: Scripta Metallurgica et Materialia; (United States), Journal Name: Scripta Metallurgica et Materialia; (United States) Vol. 30:8; ISSN SCRMEX; ISSN 0956-716X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ALLOY SYSTEMS
ALLOYS
ALUMINIUM ALLOYS
ALUMINIUM BASE ALLOYS
COPPER ALLOYS
DATA
ELECTRON MICROSCOPY
EXPERIMENTAL DATA
INFORMATION
IRON ALLOYS
MICROSCOPY
MICROSTRUCTURE
NUMERICAL DATA
TERNARY ALLOY SYSTEMS
TRANSMISSION ELECTRON MICROSCOPY