Beam Induced Reactions in Metal-Film Systems

1980 ◽  
Vol 1 ◽  
Author(s):  
S. S. Lau ◽  
Martti Mäenpää ◽  
James W. Mayer
Keyword(s):  
Metal Film ◽  
Solid Phase ◽  
Ion Beam ◽  
Metastable Phases ◽  
Ion Beam Mixing ◽  
Amorphous Phases ◽  
Metal Metal ◽  
Compositional Changes ◽  
Semiconductor Thin Film ◽  
Fast Quenching

ABSTRACTPulsed beams (laser, electron, or ion) and ion beams (ion beam mixing) have been used to induce structural and compositional changes in metal-metal and metal-semiconductor thin-film structures. Metastable crystalline and amorphous phases have been formed. Although ultra fast quenching occurs with both techniques, metastable phases are formed by quenching from the liquid with pulsed beams and from the solid-phase with ion-induced reactions. With both techniques metastable phases can be formed over a broader compositional range than with conventional melt-quench methods.

Ion beam stimulated reactions in metallic alloys

1988 ◽  
Vol 46 ◽  
pp. 490-491
Author(s):  
L. K. Mansur ◽  
E. H. Lee
Keyword(s):  
Vacancy Concentration ◽  
Ion Beam ◽  
Relaxation Times ◽  
Solute Segregation ◽  
Metallic Alloys ◽  
Defect Production ◽  
Ion Beam Mixing ◽  
Near Surface ◽  
Atomic Displacements ◽  
Compositional Changes

Ion implantation, ion beam mixing, and ion beam stimulated reactions can be discussed as somewhat distinct but related processes. The first two emphasize compositional changes in near-surface regions. The last relies mainly on microstructural and precipitation reactions caused by atomic displacements. In this last area much of the work has been carried out in metallic alloys. Here we summarize experiments in our laboratory that cover several ion-beam-induced reactions in Fe-15Ni-15Cr base alloys, to provide a perspective on related work in materials other than silicon. The techniques and mechanistic interpretations of results are applicable to a variety of materials.This is a powerful way to examine the interplay of characteristic relaxation times. Intervals of high point defect production and resultant processes, such as solute segregation and drift-directed clustering, are alternated with thermal annealing. Remarkable changes with respect to either steady bombardment or thermal aging at the same temperature can be produced. Figure 1(a) shows theoretically calculated fluctuating vacancy concentration in a steady irradiation.

Fractal morphologies of dual amorphous phases observed in Y–Ti(Nb)–Co ternary systems upon ion beam mixing

2009 ◽  
Vol 478 (1-2) ◽  
pp. L28-L32
Author(s):  
W.C. Wang ◽  
J.H. Li ◽  
F. Zeng ◽  
Y.L. Gu ◽  
B.X. Liu
Keyword(s):  
Ion Beam ◽  
Ternary Systems ◽  
Ion Beam Mixing ◽  
Amorphous Phases
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