Thermally stimulated crystalline phase transformations in metastable Fe–Cr alloy films prepared by pulsed laser deposition
- 作者：Levin ; A.A. ; Meyer ; D.C. ; Gorbunov ; A. ; Tselev ; A. ; Pompe ; W. ; Paufler ; P.
- 关键词：Transition metal compounds ; Thin films ; Crystal structure ; Phase transition
- 刊名：Journal of Alloys and Compounds
- 出版年：2002
- 期刊代码：45_09258388
- 类别：ms
- 出版时间：December 16, 2002
- 卷：347
- 期：1-2
- 页码：171-177
- 文件大小：519 K
摘要
Thermally induced crystalline phase formation of metastable Fe–Cr alloy films with different Cr-content (34.5, 43.5 and 48.5 at.%Cr) and thickness of 100 nm prepared by cross-beam pulsed laser deposition was examined by wide angle X-ray scattering. Therefore the annealing temperature was increased stepwise up to 1100°C, the duration of the treatment per step was 90 min. Through a number of intermediate metastable crystalline phases, above 550°C the phase composition did not change until the onset of reaction with Si/SiO2 substrate at mg align=center border=0 SRC=/images/glyphs/BQ1.GIF>900°C. Equilibrium σ-FeCr is formed in all samples. In addition, body-centered cubic (b.c.c.) and tetragonally distorted b.c.c. Fe–Cr phases are formed in a film with nearly equiatomic composition. Reactions with substrate result in formation of Fe- and Cr-silicides.