Measurement of solid–liquid interface temperature during pulsed excimer laser melting of polycrystalline silicon films

1994 ◽  
Vol 65 (14) ◽  
pp. 1745-1747 ◽  
Author(s):  
Xianfan Xu ◽  
Costas P. Grigoropoulos ◽  
Richard E. Russo
Keyword(s):  
Excimer Laser ◽  
Polycrystalline Silicon ◽  
Liquid Interface ◽  
Silicon Films ◽  
Interface Temperature ◽  
Laser Melting ◽  
Polycrystalline Silicon Films ◽  
Solid Liquid Interface ◽  
Solid Liquid

scholarly journals Solid–Liquid Interface Temperature Measurement of Evaporating Droplet Using Thermoresponsive Polymer Aqueous Solution

2021 ◽  
Vol 11 (8) ◽  
pp. 3379
Author(s):  
Hyung Ju Lee ◽  
Chan Ho Jeong ◽  
Dae Yun Kim ◽  
Chang Kyoung Choi ◽  
Seong Hyuk Lee
Keyword(s):  
Refractive Index ◽  
Heated Surface ◽  
Liquid Interface ◽  
Interface Temperature ◽  
Thermoresponsive Polymer ◽  
Temperature Deviation ◽  
Line Region ◽  
Optical And Mechanical Properties ◽  
Solid Liquid Interface ◽  
Solid Liquid

The present study aims to measure the solid–liquid interface temperature of an evaporating droplet on a heated surface using a thermoresponsive polymer. Poly(N-isopropylacrylamide) (pNIPAM) was used owing to its sensitive optical and mechanical properties to the temperature. We also measured the refractive index variation of the pNIPAM solution by using the surface plasmon resonance imaging (SPRi). In particular, the present study proposed a new method to measure the solid–liquid interface temperature using the correlation among reflectance, refractive index, and temperature. It was found that the reflectance of a pNIPAM solution decreased after the droplet deposition. The solid–liquid interface temperature, estimated from the reflectance, showed a lower value at the center of the droplet, and it gradually increased along the radial direction. The lowest temperature at the contact line region is present because of the maximum evaporative cooling. Moreover, the solid–liquid interface temperature deviation increased with the surface temperature, which means solid–liquid interface temperature should be considered at high temperature to predict the evaporation flux of the droplet accurately.

scholarly journals Nonequilibrium Interface Kinetics During Rapid Solidification

1986 ◽  
Vol 80 ◽  
Author(s):  
Michael J. Aziz
Keyword(s):  
Rapid Solidification ◽  
Local Equilibrium ◽  
Theoretical Work ◽  
Liquid Interface ◽  
Interface Temperature ◽  
Impurity Incorporation ◽  
Interface Kinetics ◽  
Solute Atoms ◽  
Solid Liquid Interface ◽  
Solid Liquid

AbstratThe deviations from local equilibrium at a rapidly moving solid-liquid interface are well documented. The fraction of solute atoms in the liquid at the interface that joins the crystal during rapid solidification approaches unity and the interface temperature drops. Experimental and theoretical work on impurity incorporation and interfacial undercooling is reviewed. Past and future experiments to test the theories are discussed.

Morphological Features of the Solid-Liquid Interface of a Gallium Film

1991 ◽  
Vol 237 ◽  
Author(s):  
Richard D. Robinson ◽  
Ioannis N. Miaoulis
Keyword(s):  
Preliminary Investigation ◽  
Zone Melting ◽  
Liquid Interface ◽  
Silicon Films ◽  
Processing Conditions ◽  
Scanning Velocity ◽  
Solidification Interface ◽  
Solid Liquid Interface ◽  
Solid Liquid

ABSTRACTThis paper presents a new experimental method to investigate solid-liquid interface morphologies during Zone-Melting-Recrystallization at lower than the typical processing temperatures. Gallium films were used as a substitute for silicon films. In situ preliminary investigation identified three phenomena typically occurring during ZMR of silicon films: a) Transition from planar to dendritic to cellular morphologies was observed for different processing conditions; b) cell period proved to be dependant on scanning velocity; c) instabilities at the solidification interface at low heating strip temperatures were caused by supercooling and optical property variations as the material changed phase.

scholarly journals Morphological Development of Sub-Grain Cellular/Bands Microstructures in Selective Laser Melting

Materials ◽  
2019 ◽  
Vol 12 (8) ◽  
pp. 1204 ◽  
Author(s):  
Xihe Liu ◽  
Xin Zhou ◽  
Ben Xu ◽  
Jing Ma ◽  
Congcong Zhao ◽  
...  
Keyword(s):  
Surface Tension ◽  
Selective Laser Melting ◽  
Single Layer ◽  
Liquid Interface ◽  
Morphological Development ◽  
Eutectic Alloys ◽  
Laser Melting ◽  
Submicron Scale ◽  
Solid Liquid Interface ◽  
Solid Liquid

In this paper, single-layer and bulk 316 L selective laser melting (SLM) experiments were conducted, fine submicron-scale geometric symmetrical cellular (hexagonal, pentagonal and square), elongated cellular and bands solidification morphologies were found in the laser-melt top surface. Meanwhile, morphological developed sub-grain patterns with quasi-hexagonal cellular, elongated cellular and bands structures (size ~1 μm) coexisting inside one single macro-solidified grain were also identified. This demonstrated the transitions from quasi-hexagonal-cells to elongated cells/bands, and transitions reverse, occurred in the whole bulk under some circumstances during SLM. Based on the experimental realities, these morphologies are formed by the local convection and Bénard instabilities in front of the solid/liquid interface (so-called mushy zones) affected by intricate temperature and surface tension gradients. Quasi-hexagonal cellular convective fields are then superimposed on macro-grain solidification to form the sub-grain patterns and micro-segregations. This explanation seems reasonable and is unifying as it can be expanded to other eutectic alloys with face center cubic (FCC) prevenient phase prepared by SLM, e.g., the Al-Si and Co-Cr-Mo systems.

scholarly journals Nonequilibrium Interface Kinetics During Rapid Solidification

1986 ◽  
Vol 74 ◽  
Author(s):  
Michael J. Aziz
Keyword(s):  
Rapid Solidification ◽  
Local Equilibrium ◽  
Theoretical Work ◽  
Liquid Interface ◽  
Interface Temperature ◽  
Impurity Incorporation ◽  
Interface Kinetics ◽  
Solute Atoms ◽  
Solid Liquid Interface ◽  
Solid Liquid

AbstractThe deviations from local equilibrium at a rapidly moving solid-liquid interface are well documented. The fraction of solute atoms in the liquid at the interface that joins the crystal during rapid solidification approaches unity and the interface temperature drops. Experimental and theoretical work on impurity incorporation and interfacial undercooling is reviewed. Past and future experiments to test the theories are discussed.

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