Energetics of glass-to-crystal transition in Cu/sub 60/Zr/sub 40/ -based ternary glasses
Energetic effects accompanying the transformations from a glassy solid to a crystalline one are still in the focus of attention (1). However, results are not always reproducible and selfconsistent. One good way of getting fully comparable experimental data is to perform simultaneously, in the same laboratory, quenching experiments and researches on the properties of the obtained glasses. During such a program of studies (2,3), the present results were obtained. Going from the binary Cu/sub 60/Zr/sub 40/ glass, two main series of glasses were prepared (composition in at. %): Cu/sub 60/Zr /SUB 40-x/ M /SUB x/ and Cu /SUB 60-x/ Zr/sub 40/M /SUB x/ , where M is a transition metal (Ti, Hf, V, Cr, Mn, Fe, Ni) or a metalloid (Si, Ge), and x = 2. In Ni-containing glasses, the concentration range was extended up to x = 10 (x = 2 ; 4 ; 6 ; 8 ; 10). The aim of the present paper is to report the effect of various M-elements on both the enthalpy of crystallization - ..delta..H /SUB x/ and the activation energy E. This effect is discussed first of all in terms of the position of these elements in the Periodic Table. An attempt is also made to find a relation between ..delta..H /SUB x/ , E and the so-called thermal stability T /SUB x/ of glasses (T /SUB x/ = the temperature measured at the top of the crystallization peak). It is shown that a simple correlation does not exist between T /SUB x/ and the energetic effects.
- Research Organization:
- CNRS, Centre d'Etudes de Chimie Metallurgique, Vitry
- OSTI ID:
- 5897578
- Journal Information:
- Scr. Metall.; (United States), Journal Name: Scr. Metall.; (United States) Vol. 18:10; ISSN SCRMB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360102* -- Metals & Alloys-- Structure & Phase Studies
ACTIVATION ENERGY
ALLOY SYSTEMS
ALLOYS
CHEMICAL COMPOSITION
COPPER ALLOYS
COPPER BASE ALLOYS
CRYSTAL-PHASE TRANSFORMATIONS
CRYSTALLIZATION
ENERGY
ENTHALPY
METALLIC GLASSES
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
TERNARY ALLOY SYSTEMS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT ALLOYS
ZIRCONIUM ALLOYS