Importance of solute-solute interactions on glass formability

Gangopadhyay, A K and Sahoo, K L and Kelton, K F (2011) Importance of solute-solute interactions on glass formability. Philosophical Magazine, 91 (17). pp. 2186-2199.

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Microalloying experiments on amorphous Al84La4Er2Ni8TM2 alloys were performed with the substitution of all 3d TM (transition metal) elements and one 4d TM element. The critical thickness of the amorphous alloys was used as a criterion for glass formability in this system. The results show that, other than atomic size differences and the negative heats of mixing among the solvent and solute atoms, the atomic interactions among the solute atoms play an important role on glass formation. When the solute-solute interaction becomes repulsive (positive heat of mixing), glass formability suffers. Similarly, when the solute-solute interaction becomes highly attractive, exceeding that between the solvent and solute atoms, glass formability is also degraded. Evaluation of a large number of known multicomponent bulk metallic glasses provides additional support to these conjectures. This study shows that the solute-solute interaction plays an important role in glass formation, which has not been recognized previously.

Item Type:Article
Official URL/DOI:
Uncontrolled Keywords:metallic glass; glass formability; heat of mixing; solute-solute interaction
Divisions:Metal Extraction and Forming
ID Code:3004
Deposited By:Dr. A K Sahu
Deposited On:15 Jun 2011 11:48
Last Modified:21 Nov 2011 12:23
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