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Thermodynamic and structural aspects of the polyamorphic transition in yttrium and other rare-earth aluminate liquids

Author

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  • Wilding, Martin C.
  • McMillan, Paul F.
  • Navrotsky, Alexandra

Abstract

A first-order transition between two liquids has been reported in yttrium–aluminate liquids close to Y3Al5O12 (YAG) composition. This transition is seen as the nucleation and growth of a low-density phase in a matrix of a higher density liquid when Y2O3–Al2O3 liquids are cooled below the liquidus. Both liquids are quenched to glass before the transition is complete. Analysis of the resulting composite samples shows that the two glasses are identical in composition although the two glasses differ in density by 4%. There are also mechanical differences between the two glasses; the low-density glass is more resistant to polishing, while the high-density glass becomes highly scratched.

Suggested Citation

  • Wilding, Martin C. & McMillan, Paul F. & Navrotsky, Alexandra, 2002. "Thermodynamic and structural aspects of the polyamorphic transition in yttrium and other rare-earth aluminate liquids," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 314(1), pages 379-390.
    • Handle: RePEc:eee:phsmap:v:314:y:2002:i:1:p:379-390
    DOI: 10.1016/S0378-4371(02)01045-2
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    References listed on IDEAS

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    1. Kaori Ito & Cornelius T. Moynihan & C. Austen Angell, 1999. "Thermodynamic determination of fragility in liquids and a fragile-to-strong liquid transition in water," Nature, Nature, vol. 398(6727), pages 492-495, April.
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