TY - JOUR
T1 - The melting point depression of tin in mechanically milled tin and germanium powder mixtures
AU - Koch, C. C.
AU - Jang, J. S.C.
AU - Gross, S. S.
N1 - Funding Information:
This research was supported by the Office of Naval Research under contract number N-00014-84-K-0253.
PY - 1989/6
Y1 - 1989/6
N2 - A melting point depression, ΔTM, has been observed for Sn in Ge/Sn (50 at.% Sn) dispersions which were prepared by mechanical milling of Ge and Sn powders. Sn and Ge are immiscible and form a fine dispersion of the pure components when milled in a high energy ball mill. The magnitude of ΔTM, as measured by DSC, increases with milling time, i.e., with refinement of the dispersion. Melting is observed to begin as low as 36 °C below the equilibrium bulk melting temperature. The magnitude of ΔTM is reduced by about 25% after melting the Sn. Subsequent remelts do not change ΔTM further. Impurities cannot account for ΔTm. While stored energy of cold work may contribute to ≤25% of ΔTM before Sn is melted, it is concluded that the major contribution to ΔTM comes from the nucleation of disorder/melting at the Ge/Sn interfaces.
AB - A melting point depression, ΔTM, has been observed for Sn in Ge/Sn (50 at.% Sn) dispersions which were prepared by mechanical milling of Ge and Sn powders. Sn and Ge are immiscible and form a fine dispersion of the pure components when milled in a high energy ball mill. The magnitude of ΔTM, as measured by DSC, increases with milling time, i.e., with refinement of the dispersion. Melting is observed to begin as low as 36 °C below the equilibrium bulk melting temperature. The magnitude of ΔTM is reduced by about 25% after melting the Sn. Subsequent remelts do not change ΔTM further. Impurities cannot account for ΔTm. While stored energy of cold work may contribute to ≤25% of ΔTM before Sn is melted, it is concluded that the major contribution to ΔTM comes from the nucleation of disorder/melting at the Ge/Sn interfaces.
UR - http://www.scopus.com/inward/record.url?scp=0024656212&partnerID=8YFLogxK
U2 - 10.1557/JMR.1989.0557
DO - 10.1557/JMR.1989.0557
M3 - 期刊論文
AN - SCOPUS:0024656212
SN - 0884-2914
VL - 4
SP - 557
EP - 564
JO - Journal of Materials Research
JF - Journal of Materials Research
IS - 3
ER -