scholarly journals The effect of superheat on the nucleation undercooling of metallic melts

2021 ◽  
Author(s):  
Junfeng Xu ◽  
Dandan Fan ◽  
Tao Zhang
Keyword(s):  
Nucleation Undercooling ◽  
Metallic Melts

scholarly journals Nucleation Behavior of a Single Al-20Si Particle Rapidly Solidified in a Fast Scanning Calorimeter

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2920
Author(s):  
Qin Peng ◽  
Bin Yang ◽  
Benjamin Milkereit ◽  
Dongmei Liu ◽  
Armin Springer ◽  
...  
Keyword(s):  
Cooling Rate ◽  
Rapid Solidification ◽  
Heterogeneous Nucleation ◽  
Nucleation Theory ◽  
Classical Nucleation Theory ◽  
Solidification Behavior ◽  
Nucleation Kinetics ◽  
Nucleation Behavior ◽  
Nucleation Undercooling ◽  
Primary Si

Understanding the rapid solidification behavior characteristics, nucleation undercooling, and nucleation mechanism is important for modifying the microstructures and properties of metal alloys. In order to investigate the rapid solidification behavior in-situ, accurate measurements of nucleation undercooling and cooling rate are required in most rapid solidification processes, e.g., in additive manufacturing (AM). In this study, differential fast scanning calorimetry (DFSC) was applied to investigate the nucleation kinetics in a single micro-sized Al-20Si (mass%) particle under a controlled cooling rate of 5000 K/s. The nucleation rates of primary Si and secondary α-Al phases were calculated by a statistical analysis of 300 identical melting/solidification experiments. Applying a model based on the classical nucleation theory (CNT) together with available thermodynamic data, two different heterogeneous nucleation mechanisms of primary Si and secondary α-Al were proposed, i.e., surface heterogeneous nucleation for primary Si and interface heterogenous nucleation for secondary α-Al. The present study introduces a practical method for a detailed investigation of rapid solidification behavior of metal particles to distinguish surface and interface nucleation.

scholarly journals Diffusion and interdiffusion in binary metallic melts

2014 ◽  
Vol 90 (2) ◽  
Author(s):  
P. Kuhn ◽  
J. Horbach ◽  
F. Kargl ◽  
A. Meyer ◽  
Th. Voigtmann
Keyword(s):  
Metallic Melts

scholarly journals Bicontinuous Porous Metals by Dealloying in Metallic Melts

Materia Japan ◽  
2016 ◽  
Vol 55 (11) ◽  
pp. 519-527
Author(s):  
Hidemi Kato ◽  
Takeshi Wada
Keyword(s):  
Porous Metals ◽  
Metallic Melts

Application of the hard sphere potential model to the stability of dispersoids in metallic melts

1990 ◽  
Vol 24 (8) ◽  
pp. 1425-1428 ◽  
Author(s):  
T.R. Ramamohan ◽  
Geetha Ramani ◽  
R.M. Pillai ◽  
B.C. Pai
Keyword(s):  
Hard Sphere ◽  
Potential Model ◽  
Metallic Melts ◽  
The Stability

A new procedure for measuring the thermal diffusivity of non-metallic melts at high temperatures

1996 ◽  
Vol 67 (8) ◽  
pp. 314-319 ◽  
Author(s):  
Hans Adolf Friedrichs ◽  
Leonid Wladimirowitsch Ronkow ◽  
Yongmao Zhou
Keyword(s):  
Thermal Diffusivity ◽  
High Temperatures ◽  
Metallic Melts

Examination by filming of the kinetics of saturation of porous media of diamond and graphite with metallic melts

1988 ◽  
Vol 27 (6) ◽  
pp. 479-482
Author(s):  
Yu. V. Naidich ◽  
G. P. Volk ◽  
L. Yu. Ostrovskaya ◽  
V. M. Chashnik ◽  
I. A. Lavrinenko
Keyword(s):  
Porous Media ◽  
Metallic Melts ◽  
Kinetics Of
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