Details

Autor(en) / Beteiligte

• Wallace, R. J.
• Kaufmann, E. N.
• Bell, W. L.

Titel

Crystallization study of the Ta55–Ir45 amorphous alloy

Ist Teil von

• Journal of materials research, 2016-06, Vol.1 (6), p.758-764

Ort / Verlag

New York, USA: Cambridge University Press

Erscheinungsjahr

2016

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The crystallization behavior of an arc-melted, splat-quenched amorphous Ta55–Ir45 alloy was investigated by differential thermal analysis (DTA) and transmission electron microscopy (TEM). The DTA experiments showed that the glass transition temperature (Tg) for this material was 485 °C and that the crystallization temperature (Tx) closely followed at 495 °C. This Tx is much lower than has been previously reported. In-situ TEM annealing experiments, in addition to confirming Tx, illustrated that crystallization proceeds as a two-step process. A fcc phase is the first to crystallize at 500 °C followed by the equilibrium phases, α and σ, and/or the bcc Ta phase near 600°–650 °C. Microhardness measurements were made as part of an initial mechanical properties investigation. Inconsistencies with the work of previous investigators of this system are discussed.