Rapid E-Beam Heating for Measuring Thermodynamics of Metastable Materials

1988 ◽  
Vol 100 ◽  
Author(s):  
J. A. Knapp ◽  
D. M. Follstaedt
Keyword(s):  
Electron Beam ◽  
Solid State ◽  
Line Source ◽  
Metastable Phases ◽  
Slow Heating ◽  
Surface Layers ◽  
New Approach ◽  
Beam System ◽  
Beam Heating ◽  
Melting Transitions

ABSTRACTA line-source electron-beam system has been used to heat thin surface layers of metastable phases at a rate which precludes solid-state transformations to stable phases, thus permitting the observation of melting transitions normally missed with slow heating. A detailed example of a new approach to this method is shown for metastable icosahedral Al-Re and. crystalline Al6Re.

Magnetization study in solid state formation of lithium-titanium ferrites synthesized by electron beam heating

2016 ◽  
Vol 176 ◽  
pp. 110-114 ◽  
Author(s):  
Anatoly P. Surzhikov ◽  
Elena N. Lysenko ◽  
Vitaly A. Vlasov ◽  
Andrey V. Malyshev ◽  
Elena A. Vasendina
Keyword(s):  
Electron Beam ◽  
Solid State ◽  
State Formation ◽  
Magnetization Study ◽  
Beam Heating ◽  
Electron Beam Heating ◽  
Lithium Titanium

Cold Cathode Electron Beam Recrystallization of Soi Films

1987 ◽  
Vol 107 ◽  
Author(s):  
L. R. Thompson ◽  
J. A. Knapp ◽  
C. A. Moore ◽  
G. J. Collins
Keyword(s):  
Electron Beam ◽  
Line Intensity ◽  
Line Source ◽  
Power Level ◽  
Control Procedure ◽  
Cold Cathode ◽  
Direct Control ◽  
Beam System ◽  
Computer Based ◽  
Zone Melt

AbstractA cold cathode line source electron beam system for forming SOI films by zone melt recrystallization is described. Possible advantages gained from using a cold cathode electron beam include the controllability of the beam profile and power level, as well as straight-forward scaling to recrystallization of 6 or 8 inch wafers. A computer-based melt width control procedure incorporating feedback to the line intensity from optical observation of the molten zone is also described. This technique allows direct control and adjustment of the melt zone over widths typically from 1 to 3 mm.

Formation of Surface Layers of Icosahedral Al(Mn)

1985 ◽  
Vol 51 ◽  
Author(s):  
J. A. Knapp ◽  
D. M. Follstaedt
Keyword(s):  
Electron Beam ◽  
Solid State ◽  
Ion Beam ◽  
Icosahedral Phase ◽  
Surface Layers ◽  
Melt Quenching ◽  
Ion Beam Mixing ◽  
State Diffusion ◽  
Laser Treatments ◽  
A New Technique

ABSTRACTSurface layers of the icosahedral phase of Al(Mn) have been formed from thin, alternating Al/Mn layers deposited on Al or Fe surfaces by rapid electron-beam or laser melting, by ion beam mixing, and by solid-state diffusion. The electron beam and laser treatments are similar to other liquid quenching techniques used previously to form the phase, but have well defined temperature histories which allow us to place limits on the melting point of the icosahedral phase, the time needed for its nucleation from the melt, and its growth velocity. Ion beam mixing is a way of forming the icosahedral phase which is quite different from melt quenching; the phase is formed during ion beam mixing at temperatures of 100–200°C. For mixing at ≤60C an amorphous phase with icosahedral short-range order is formed; this phase can be converted to the icosahedral phase by subsequent annealing. Formation of the icosahedral phase by reacting the as-deposited layers in the solid state is a new technique not previously reported. The results presented here place new restrictions on proposed structural and thermodynamic models for the icosahedral phase.

scholarly journals Preparation and Electron-Beam Surface Modification of Novel TiNi Material for Medical Applications

2021 ◽  
Vol 11 (10) ◽  
pp. 4372
Author(s):  
Sergey G. Anikeev ◽  
Anastasiia V. Shabalina ◽  
Sergei A. Kulinich ◽  
Nadezhda V. Artyukhova ◽  
Daria R. Korsakova ◽  
...  
Keyword(s):  
Electron Beam ◽  
Material Surface ◽  
High Current ◽  
New Materials ◽  
New Approach ◽  
Pulsed Electron Beam ◽  
Beam Surface ◽  
Compositional Changes ◽  
Unmodified Sample ◽  
Mcf 7

A new approach to fabricate TiNi surfaces combining the advantages of both monolithic and porous materials for implants is used in this work. New materials were obtained by depositing a porous TiNi powder onto monolithic TiNi plates followed by sintering at 1200 °C. Then, further modification of the material surface with a high-current-pulsed electron beam (HCPEB) was carried out. Three materials obtained (one after sintering and two after subsequent beam treatment by 30 pulses with different pulse energy) were studied by XRD, SEM, EDX, surface profilometry, and by means of electrochemical measurements, including OCP and EIS. Structural and compositional changes caused by HCPEB treatment were investigated. Surface properties of the samples during their storage in saline for 10 days were studied and a model experiment with cell growth (MCF-7) was carried out for the unmodified sample with an electron beam to detect cell appearance on different surface locations.

Structure changes in the surface layers of Ti-6Al-4V titanium alloy under electron beam treatment

2017 ◽  
Author(s):  
Elena Sinyakova ◽  
Alexey Panin ◽  
Olga Perevalova ◽  
Marina Kazachenok ◽  
Yurii Ivanov ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Electron Beam ◽  
Electron Beam Treatment ◽  
Surface Layers ◽  
Structure Changes
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