The Effect of Hydrogen Content on Ion Beam Mixing

1988 ◽  
Vol 128 ◽  
Author(s):  
R. E. Wistrom ◽  
P. Børgesen ◽  
H. H. Johnson ◽  
D. A. Lilienfeld
Keyword(s):  
Binding Energy ◽  
Qualitative Study ◽  
Hydrogen Content ◽  
Ion Beam ◽  
Multilayer System ◽  
Mixing Rate ◽  
Ion Beam Mixing

ABSTRACTA qualitative study of ion beam mixing of multilayers has shown that the presence of hydrogen in the sample slows mixing considerably for Fe/Ti, and slightly for Ni/Ti. We have quantified this effect and extended the study to four more systems (Co/Ti, Pd/Ti, Ti/Cu, and Ti/Al) and to lower temperatures. The degree to which H charging reduced the mixing rate varied substantially with multilayer system. H was lost during mixing. H was lost fastest from those films for which the H effect was the smallest. Our data are consistent with a model that relates mixing inhibition to H-vacancy binding energy in the non-Ti component.

Phase formation by ion beam mixing in the Ti/Si multilayer system

2006 ◽  
Vol 252 (11) ◽  
pp. 4016-4019 ◽  
Author(s):  
Veenu Sisodia ◽  
D. Kabiraj ◽  
W. Bolse ◽  
I.P. Jain
Keyword(s):  
Phase Formation ◽  
Ion Beam ◽  
Multilayer System ◽  
Ion Beam Mixing

The influence of hydrogen on ion beam mixing of multilayer films

1989 ◽  
Vol 4 (4) ◽  
pp. 821-833 ◽  
Author(s):  
P. B⊘rgesen ◽  
R. E. Wistrom ◽  
H. H. Johnson ◽  
D. A. Lilienfeld
Keyword(s):  
Room Temperature ◽  
Ion Beam ◽  
Liquid Nitrogen Temperature ◽  
Heat Of Mixing ◽  
Mixing Rate ◽  
Ion Beam Mixing ◽  
Thermal Spike Model ◽  
Spike Model ◽  
Mixing Rates ◽  
Lower Temperature

Previous qualitative studies of ion beam mixing of Ni–Ti and Fe–Ti multilayers at room temperature have shown the Ni–Ti samples to mix considerably faster than the Fe–Ti, in apparent contrast with theory. Furthermore, the Fe–Ti mixing was strongly inhibited by previous charging of the sample with hydrogen, whereas only a small effect was seen for Ni–Ti. We have quantified the mixing and extended the study to four more systems (Al–Ti. Co–Ti, Cu–Ti, and Pd–Ti) and lower temperatures. This allows some important conclusions to be drawn. Predictions based on a thermal spike model underestimate the larger room temperature mixing rates (Cu–Ti, Ni–Ti, and Pd–Ti), apparently because of contributions from a temperature dependent mechanism such as radiation enhanced diffusion. The lower mixing rates (Fe–Ti, Co–Ti, and Ni–Ti at ∼80 K) are overestimated by a factor of 2–3.5, possibly because of hydrogen contamination of the as-deposited samples. For the Al–Ti sample, the experimental mixing rate was in good agreement with predictions. Except for the Cu–Ti sample, results were seen to vary with heat of solution, rather than heat of mixing, suggesting significant contributions from the lower temperature after-spike regime. Hydrogen charging was found to reduce the Fe–Ti mixing rate by a factor of 7 at room temperature, whereas the Co–Ti and Ni–Ti rates were only reduced by a factor of 2, and the mixing of the Pd–Ti was influenced very little. Near liquid nitrogen temperature the Ni–Ti mixing rate was more strongly reduced (by a factor of 3–4). Our results suggest that the original hydrogen contamination in as-deposited samples may also cause significant reduction of mixing rates in some materials.

Amorphization of Fe/Zr Multilayers by Ar-Ion-Beam-Mixing

1993 ◽  
Vol 311 ◽  
Author(s):  
M. Kopcewicz ◽  
J. Jagielski ◽  
T. Stobiecki ◽  
F. Stobiecki ◽  
K. RÖLL
Keyword(s):  
Layer Thickness ◽  
Conversion Electron ◽  
Ion Beam ◽  
Multilayer System ◽  
Ion Beam Mixing ◽  
Modulation Wavelength

ABSTRACTThe Ar-ion-beam-mixing of the FeZr multilayer system is studied by conversion electron Mdssbauer spectroscopy. The dependence of the amorphization process on the layer thickness and ion dose is studied in detail for samples with Fe to Zr ratio of 1 and 0.5 and modulation wavelength of 5 to 90 nm.

Ion-beam mixing in energetic collision cascades: Thermal-spike model and experiments

1999 ◽  
Vol 14 (1) ◽  
pp. 281-285 ◽  
Author(s):  
Byungwoo Park ◽  
Hyukjae Lee
Keyword(s):  
Ion Beam ◽  
Atomic Diffusion ◽  
Heat Of Mixing ◽  
Thermal Spike ◽  
Mixing Rate ◽  
Ion Beam Mixing ◽  
Nuclear Stopping ◽  
Thermal Spike Model ◽  
Spike Model ◽  
Mixing Rates

A phenomenological model of ion-beam mixing during energetic collision cascades is developed, based on the concept of a thermal spike, to correctly predict that the mixing rate Dt depends linearly on nuclear stopping power (instead of a power-law dependence), and is correlated with a heat of mixing (analogous to Darken's relation). Previous ion-beam mixing experiments from 25 different metallic bilayers agree well with the model's predictions: mixing rates (Dt)/(ion-dose) ∼ 1 nm4, and an activation enthalpy of approximately 1 eV for atomic diffusion in liquid-like cascades.

Ion Beam Mixing of Ni-Ti Bilayered Thin Films

1985 ◽  
Vol 43 ◽  
pp. 290-291
Author(s):  
A. K. Rai ◽  
R. S. Bhattacharya ◽  
M. H. Rashid
Keyword(s):  
Crystal Structure ◽  
Thin Films ◽  
Amorphous Alloys ◽  
Ion Beam ◽  
Ion Bombardment ◽  
High Energy ◽  
Mixing Efficiency ◽  
Ion Beam Mixing ◽  
Enhanced Diffusion ◽  
Binary Metal

Ion beam mixing has recently been found to be an effective method of producing amorphous alloys in the binary metal systems where the two original constituent metals are of different crystal structure. The mechanism of ion beam mixing are not well understood yet. Several mechanisms have been proposed to account for the observed mixing phenomena. The first mechanism is enhanced diffusion due to defects created by the incoming ions. Second is the cascade mixing mechanism for which the kinematicel collisional models exist in the literature. Third mechanism is thermal spikes. In the present work we have studied the mixing efficiency and ion beam induced amorphisation of Ni-Ti system under high energy ion bombardment and the results are compared with collisional models. We have employed plan and x-sectional veiw TEM and RBS techniques in the present work.

Energy dependence of ion beam mixing at Fe-Al and Fe-Cu interface: A conversion electron Mössbauer spectroscopic study

1988 ◽  
Vol 106 (4) ◽  
pp. 297-309 ◽  
Author(s):  
D. M. Phase ◽  
Jayashree Patankar ◽  
V. N. Kulkarni ◽  
S. B. Ogale
Keyword(s):  
Spectroscopic Study ◽  
Energy Dependence ◽  
Conversion Electron ◽  
Ion Beam ◽  
Ion Beam Mixing

scholarly journals Formation of the titanium-aluminum intermetallic compounds by ion-beam mixing

2020 ◽  
Vol 1713 ◽  
pp. 012012
Author(s):  
P V Bykov ◽  
V L Vorob’ev ◽  
I N Klimova ◽  
A A Kolotov ◽  
A Yu Drozdov ◽  
...  
Keyword(s):  
Intermetallic Compounds ◽  
Ion Beam ◽  
Ion Beam Mixing ◽  
Titanium Aluminum

Ion beam mixing to study the metallic glass formation of the Cu–Zr system

2010 ◽  
Vol 64 (1) ◽  
pp. 96-98 ◽  
Author(s):  
T.L. Wang ◽  
W.T. Huang ◽  
W.C. Wang ◽  
B.X. Liu
Keyword(s):  
Metallic Glass ◽  
Glass Formation ◽  
Ion Beam ◽  
Ion Beam Mixing
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