TY - GEN
T1 - Irreversible microstructure changes in thin film reactions
AU - Tu, K. N.
N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].
PY - 1995
Y1 - 1995
N2 - One of the most interesting microstructure changes in thin film reaction is the formation of amorphous alloys by slowly heating a bilayer of crystalline thin films. For example, we obtain amorphous alloys in bilayers of Ni/Zr and Rh/Si by slowly heating them around 250°C. There is a critical thickness in the formation; if the amorphous layers grow thicker than a thousand angstroms, they tends to crystallize. On the other hand, if we heat those bilayers above 400°C, crystalline compounds form directly. Clearly there is a competing formation between the amorphous and the crystalline phases. The most likely kinetic reason in favor of forming the amorphous phase at the lower temperature is the faster rate of free energy change. A brief review of the amorphous alloy formation by slow heating and a discussion of the driving force, kinetic process, and prediction of first phase formation will be given in this paper to honor the 70th birthday of Professor James C.M. Li.
AB - One of the most interesting microstructure changes in thin film reaction is the formation of amorphous alloys by slowly heating a bilayer of crystalline thin films. For example, we obtain amorphous alloys in bilayers of Ni/Zr and Rh/Si by slowly heating them around 250°C. There is a critical thickness in the formation; if the amorphous layers grow thicker than a thousand angstroms, they tends to crystallize. On the other hand, if we heat those bilayers above 400°C, crystalline compounds form directly. Clearly there is a competing formation between the amorphous and the crystalline phases. The most likely kinetic reason in favor of forming the amorphous phase at the lower temperature is the faster rate of free energy change. A brief review of the amorphous alloy formation by slow heating and a discussion of the driving force, kinetic process, and prediction of first phase formation will be given in this paper to honor the 70th birthday of Professor James C.M. Li.
UR - https://www.scopus.com/pages/publications/0029464027
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-0029464027&origin=recordpage
M3 - RGC 32 - Refereed conference paper (with host publication)
T3 - Proceedings of the James Li Symposium on Micromechanics of Advanced Materials
SP - 501
EP - 506
BT - Proc 1996 Symp Micromech Adv Mater
PB - Minerals, Metals & Materials Soc (TMS)
T2 - Proceedings of the 1996 Symposium on Micromechanics of Advanced Materials
Y2 - 29 October 1995 through 2 November 1995
ER -