A Study of the Temperature Distribution in a Polymer-Composite Rod When Heat-Treated with Microwave Radiation

2019 ◽  
Vol 62 (4) ◽  
pp. 365-370
Author(s):  
A. V. Mamontov ◽  
V. N. Nefedov ◽  
S. A. Khritkin
Keyword(s):  
Temperature Distribution ◽  
Microwave Radiation ◽  
Polymer Composite ◽  
Composite Rod ◽  
Heat Treated

A computer model of temperature distribution inside a lossy sphere after microwave radiation

1980 ◽  
Vol 1 (3) ◽  
pp. 337-343 ◽  
Author(s):  
W. S. Janna ◽  
E. P. Russo ◽  
R. McAfee ◽  
Reza M. Davoudi
Keyword(s):  
Temperature Distribution ◽  
Microwave Radiation ◽  
Computer Model

scholarly journals THE application of polymer radioabsorbing materials TO SOLVE THE problem of electromagnetic safety

2016 ◽  
pp. 9-13
Author(s):  
V. A. Bannyi ◽  
V. A. Ignatenko
Keyword(s):  
Composite Materials ◽  
Microwave Radiation ◽  
Polymer Composite ◽  
Phase State ◽  
Effective Means ◽  
Polymer Composite Materials ◽  
Biological Objects ◽  
Chiral Structures ◽  
Highly Effective ◽  
Electronic Microscope

Objective: to develop and create new absorbers of microwave radiation on polymer basis; to assess the perspectives of application of polymer composite radioabsorbing materials (RAM) and electromagnetic screens (EMS) for solving of the problem of electromagnetic ecology and electromagnetic protection of biological objects. Material and methods. Monolithic, fibrous and combined RAM based on filled thermoplastics were chosen as subjects of the study. Dielectric, magnetic and electroconducting substances different in nature, shape, size and a phase state were used as a filler. The RAM structure was study with means of a scanning electronic microscope. Results and discussion. The application of polymer composite materials for protection of biological objects from the effect of microwaves has been shown as efficient. The prospects for creation of polymer RAM, containing biodegradable components, nanoparticles, chiral structures, encapsulated liquids and also as non-woven RAM and polymers with own electroconductive have been analysed. Conclusion. RAM based on polymer composite thermoplastics and EMS are highly effective means for solving the problems of electromagnetic ecology.

Investigation of Cooling Process of a High-Temperature Hollow Cylinder in Moving Induction Heat Treatment

2012 ◽  
Vol 4 (1) ◽  
Author(s):  
H. Shokouhmand ◽  
S. Ghaffari
Keyword(s):  
Heat Treatment ◽  
Temperature Distribution ◽  
Moving Boundary ◽  
Work Piece ◽  
Cooling Process ◽  
Temperature Dependent ◽  
Time Step ◽  
Heat Treated ◽  
Rate Of Cooling ◽  
Temperature Dependent Properties

The hardness of heat treated steel and probability of occurrence of quenching cracks depend on the cooling time and temperature distribution. Therefore, the investigation of cooling process is a crucial issue in heat treatment to evaluate the obtained structure of the work-piece. In the present work, a vertical hollow circular cylinder is heated up to a specific temperature by a moving coil at a given velocity along it, and the heated parts then quenched by a moving water–air spray. After passing the spray, the cylinder is cooled by natural convection with the surrounding air. An analysis of coupled magnetic problem and transient conjugated thermal problem between the solid and the surrounding air is performed using finite-element method to obtain temperature field in each time step. This procedure includes moving boundary conditions, effect of radiation with ambient, temperature-dependent properties, and change in magnetic permeability of specified alloy at the Curie temperature. The obtained results show how both spray and natural cooling affect the temperature distribution and rate of cooling of the cylinder. Furthermore, the effect of geometry and velocity of coil on the rate of cooling and chance of quenching cracks are investigated.

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