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An infrared thermography study of the temperature variation of an amorphous ribbon during production by planar flow casting

1988; Elsevier BV; Volume: 98; Linguagem: Inglês

10.1016/0025-5416(88)90134-6

1873-4928

Pierre Cremer, J. Bigot,

Metallic Glasses and Amorphous Alloys

In the planar flow process, the quenching rate between the end of the puddle and the room temperature influences properties such as enthalpy of structural relaxation, and mechanical and magnetic behaviour. Infrared thermography of ribbons processed on a massive wheel and on a water-cooled wheel shows that, in both cases, the centre of the ribbon is colder than the edges. This the attributed to the edges lifting because of thermal contraction of the centre of the free surface of the ribbon. In the case of a massive wheel, the temperature increases during four revolutions of the wheel. This has been correlated to desorption from the wheel that increases the size of the air sockets trapped under the liquid pool. The difference of quenching rate between the centre and the edges results in differences in the properties in the transverse direction for as-cast ribbon produced by the planar flow casting process.