Pyrolytic Lcvd of Silicon Using A Pulsed Visible Laser - Experiment and Modelling

1993 ◽  
Vol 334 ◽  
Author(s):  
B. Ivanov ◽  
C. Popov ◽  
V. Shanov ◽  
D. Filipov
Keyword(s):  
Temperature Distribution ◽  
Kinetic Models ◽  
Pulse Shape ◽  
Function Analysis ◽  
Diffusion Problem ◽  
Heat Diffusion ◽  
Vapor Laser ◽  
Copper Bromide ◽  
Visible Laser ◽  
Laser Experiment

AbstractMaskless deposition of silicon from silane on Si monocrystalline wafer using copper bromide vapor laser (CBVL) is investigated. Morphology and geometric parameters of the stripes obtained are studied and some conclusions for the process mechanism are made. Applying Kirchoff's transform and Green's function analysis nonlinear heat diffusion problem for different pulse shapes was solved. The influence of pulse shape on the temperature distribution and its time evolution was studied. Nonisothermal and non-stationary deposition kinetic models using the obtained results were developed.

High-power copper bromide vapor laser

2021 ◽  
pp. 127363
Author(s):  
I.K. Kostadinov ◽  
K.A. Temelkov ◽  
D.N. Astadjov ◽  
S.I. Slaveeva ◽  
G.P. Yankov ◽  
...  
Keyword(s):  
High Power ◽  
Vapor Laser ◽  
Copper Bromide

Effects of Peaking Capacitor in a Copper Bromide Vapor Laser

1999 ◽  
Vol 38 (Part 1, No. 2A) ◽  
pp. 773-774
Author(s):  
Teckyong Tou ◽  
Weeong Siew ◽  
Kwongkeong Tham
Keyword(s):  
Vapor Laser ◽  
Copper Bromide

A Copper Bromide Vapor Laser of 120 Watts Output Power

1996 ◽  
Author(s):  
N.V. Sabotinov ◽  
K.D. Dimitrov ◽  
N.K. Vuchkov ◽  
D.N. Astadjov ◽  
V.K. Kirkov
Keyword(s):  
Output Power ◽  
Vapor Laser ◽  
Copper Bromide

Proper Generalized Decomposition to Solve a 2D Coupled Heat-Diffusion Problem

2012 ◽  
Author(s):  
T. L. Nguyen ◽  
M. Beringhier ◽  
J. C. Grandidier
Keyword(s):  
Degrees Of Freedom ◽  
Computation Time ◽  
Diffusion Problem ◽  
Point Of View ◽  
Heat Diffusion ◽  
Stability Conditions ◽  
Coupled Problems ◽  
Proper Generalized Decomposition ◽  
Strongly Coupled ◽  
Physical Phenomena

To predict the effect of the environment on the durability of composites or polymers [3], we often have to consider coupled physical phenomena (thermo-diffuso-chemico-mechanic). Therefore, strongly coupled problems with a large number of characteristic times have to be considered. From a numerical point of view, solving these problems with the finite elements method requires the use of an incremental time scheme in which stability conditions lead to a large number of degrees of freedom and a large computation time.

MULTIGRID METHOD FOR THE SOLUTION OF 2D HEAT DIFFUSION PROBLEM USING NON-ORTHOGONAL STRUCTURED GRIDS

2017 ◽  
Author(s):  
Daiane Cristina Zanatta ◽  
Luciano Kiyoshi Araki ◽  
Marcio Augusto Villela Pinto
Keyword(s):  
Multigrid Method ◽  
Diffusion Problem ◽  
Heat Diffusion ◽  
Structured Grids

scholarly journals Analyses of Effects of Cutting Parameters on Cutting Edge Temperature Using Inverse Heat Conduction Technique

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Marcelo Ribeiro dos Santos ◽  
Sandro Metrevelle Marcondes de Lima e Silva ◽  
Álisson Rocha Machado ◽  
Márcio Bacci da Silva ◽  
Gilmar Guimarães ◽  
...  
Keyword(s):  
Temperature Distribution ◽  
High Speed Steel ◽  
Cutting Parameters ◽  
Heat Fluxes ◽  
Cutting Edge ◽  
Heat Diffusion ◽  
Numerical Code ◽  
Heat Diffusion Equation ◽  
Specification Method ◽  
Edge Temperature

During machining energy is transformed into heat due to plastic deformation of the workpiece surface and friction between tool and workpiece. High temperatures are generated in the region of the cutting edge, which have a very important influence on wear rate of the cutting tool and on tool life. This work proposes the estimation of heat flux at the chip-tool interface using inverse techniques. Factors which influence the temperature distribution at the AISI M32C high speed steel tool rake face during machining of a ABNT 12L14 steel workpiece were also investigated. The temperature distribution was predicted using finite volume elements. A transient 3D numerical code using irregular and nonstaggered mesh was developed to solve the nonlinear heat diffusion equation. To validate the software, experimental tests were made. The inverse problem was solved using the function specification method. Heat fluxes at the tool-workpiece interface were estimated using inverse problems techniques and experimental temperatures. Tests were performed to study the effect of cutting parameters on cutting edge temperature. The results were compared with those of the tool-work thermocouple technique and a fair agreement was obtained.

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