Ion Irradiation Induced Metastable Phase Formation in the Al-Zr System

1986 ◽  
Vol 74 ◽  
Author(s):  
David A. Lilienfeld ◽  
J. W. Mayer
Keyword(s):  
Thin Film ◽  
Solid Solution ◽  
Elevated Temperature ◽  
Thermal Annealing ◽  
Phase Formation ◽  
Ion Irradiation ◽  
Metastable Phase ◽  
Metastable Solid Solution ◽  
Metastable Phase Formation

AbstractThe Al-Zr system was investigated in an effort to form quasicrystals. While no quasicrystals were found, a metastable phase previously formed only by annealing of a metastable solid solution was observed. This phase was formed by thermal annealing or by elevated temperature ion irradiations of thin film specimens. This work is the first observation of ion irradiation induced formation of this metastable phase.

Metastable phase formation by ion mixing of Nb–Al multilayers

1989 ◽  
Vol 4 (6) ◽  
pp. 1385-1392 ◽  
Author(s):  
K. Pampus ◽  
K. Dyrbye ◽  
B. Torp ◽  
R. Bormann
Keyword(s):  
Solid Solution ◽  
Amorphous Phase ◽  
Phase Formation ◽  
Ion Irradiation ◽  
Metastable Phase ◽  
Heavy Ion ◽  
Free Energies ◽  
Transmission Electron ◽  
Radiation Enhanced Diffusion ◽  
Metastable Phase Formation

The structure of Nb–Al thin films after ion mixing was studied for compositions from 20 to 85 at. % Al as a function of temperature in the range between 40 and 620 K. The phase formation was determined by transmission electron microscopy. At lower temperatures, only supersaturated bcc-solid solution, NbAl, and amorphous phase were found throughout the studied composition range. Besides these phases irradiation at temperatures above 470 K causes the formation of a metastable crystalline compound at an overall composition close to Nb25Al75, and for T = 623 K the equilibrium compound NbAl3 is formed. The other intermetallic phases Nb2Al and Nb3Al have not been observed at any irradiation temperature. Calculations of the Gibbs free energies of the various phases are presented, and the reliability of extrapolations to regions of metastability with respect to temperature and composition is commented on. The phase formation during heavy-ion irradiation is discussed in the context of the calculated free energies and kinetic constraints. For temperatures above 300 K, the attainment of a metastable phase equilibrium between the bcc solid solution and the amorphous phase is proposed due to the influence of radiation enhanced diffusion.

Metastable phase formation in reactively sputtered WxSiy films

1986 ◽  
Vol 4 (6) ◽  
pp. 3117-3120 ◽  
Author(s):  
J. S. Lin ◽  
R. C. Budhani ◽  
G. Pollock ◽  
C. V. Deshpandey ◽  
R. F. Bunshah
Keyword(s):  
Phase Formation ◽  
Metastable Phase ◽  
Metastable Phase Formation

scholarly journals Modeling of metastable phase formation diagrams for sputtered thin films

2016 ◽  
Vol 17 (1) ◽  
pp. 210-219 ◽  
Author(s):  
Keke Chang ◽  
Denis Music ◽  
Moritz to Baben ◽  
Dennis Lange ◽  
Hamid Bolvardi ◽  
...  
Keyword(s):  
Thin Films ◽  
Phase Formation ◽  
Metastable Phase ◽  
Metastable Phase Formation

Metastable Phase Formation in Rapidly Solidified ZrO2-Al2O3 Powders

2003 ◽  
Vol 437-438 ◽  
pp. 407-410 ◽  
Author(s):  
X. Zhou ◽  
R.K. Sadangi ◽  
Bernard H. Kear ◽  
W.R. Cannon
Keyword(s):  
Phase Formation ◽  
Metastable Phase ◽  
Metastable Phase Formation ◽  
Rapidly Solidified

Metastable phase formation during the reaction of Ni films with Si(001): The role of texture inheritance

2010 ◽  
Vol 107 (9) ◽  
pp. 093515 ◽  
Author(s):  
S. Gaudet ◽  
C. Coia ◽  
P. Desjardins ◽  
C. Lavoie
Keyword(s):  
Phase Formation ◽  
Metastable Phase ◽  
Metastable Phase Formation
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