Abstract
The formation and decomposition behaviour of metastable structures in liquid-quenched (LQ) Ag-Ge alloys was studied with X-ray diffraction, resistivity measurements and TEM techniques. Pure Ag and alloys containing 7, 10, 15, 20 and 22.5 at. % Ge were studied. Upon LQ, pure Ag and 7 and 10 at. % Ge alloys yield a single f cc phase; 15 and 20 at. % Ge alloys give a mixture of two metastable phases (f cc and h cp); and the Ag-22.5 at. % Ge alloy gives a metastable h cp phase. Also, the first evidence of an amorphous phase in as-LQ Ag-22.5 at. % Ge alloy is presented. It is shown that Ag-rich f cc phase can retain up to ∼ 20at. % Ge in solid solution. Furthermore, stacking faults play an important role in the formation and decomposition of metastable phases in the Ag-Ge system.
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References
P. Duwez, R. H. Willens andW. Klement Jr.,J. Appl. Phys. 31 (1960) 1137.
W. Klement Jr.,J. Inst. Metals 90 (1961) 27.
P. Ramachandrarao andT. R. Anantharaman,Trans. Met. Soc. AIME 245 (1969) 892;Phil Mag. 20 (1969) 201.
P. Ramachandrarao, P. Rama Rao andT. R. Anantharaman,Z. MetallK. 61 (1970) 471.
P. Furrer, T. R. Anantharaman andH. Warlimont,Phil. Mag. 21 (1970) 873.
H. O. K. Kirchner, P. Ramachandrarao andG. A. Chadwick,ibid 23 (1972) 1151.
E. A. Owen andV. W. Rowlands,J. Inst. Metals 66 (1940) 361.
C. S. Barrett, in “Imperfections in Nearly Perfect Crystals”, edited by C. S. Barrett and T. B. Massalski (Wiley, New York, 1952) p. 97.
B. E. Warren,J. Appl. Phys. 34 (1963) 1973.
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Agarwal, S.C., Herman, H. Liquid-quenched Ag-Ge alloys; formation and evolution of metastable phases. J Mater Sci 12, 2021–2027 (1977). https://doi.org/10.1007/BF00561974
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DOI: https://doi.org/10.1007/BF00561974