Sintering of Al&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt;-ZrO&lt;sub&gt;2&lt;/sub&gt; Composites Using Millimeter-Wave Radiation

Makino, Yukio; Ohmae, Takashi; Setsuhara, Yuichi; Miyake, Shojiro; Sano, Sadao

doi:10.4028/www.scientific.net/kem.161-163.41

Cited by 12 publications

(6 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the case when the material is illuminated by a wave beam, for simple order-of-magnitude estimates one can use Eqs. (4) and (6) to relate the E-field amplitude in the plane wave to the power, P, of the microwave source:…”

Section: Modeling Of Electromagnetic Aspects Of Microwave Sinteringmentioning

confidence: 99%

“…The microwave heating methods in the high‐temperature domain are currently under active development, with prospects of industrial use in the near future. The advantages of high‐temperature microwave processing have been demonstrated in such fields as sintering and joining of ceramic materials, inorganic synthesis, development of composite materials, powder metallurgy, industrial and radioactive waste remediation, annealing of implanted semiconductor structures, etc.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Microwave Sintering: Fundamentals and Modeling

2013

View full text Add to dashboard Cite

This paper reviews the basic physical notions underlying microwave sintering and the theoretical and numerical models of the microwave sintering process. The propagation and absorption of electromagnetic waves in materials, and the distribution of electromagnetic field in cavity resonators that serve as applicators for microwave processing are discussed and the electromagnetic modeling of such applicators is reviewed. The microwave absorption properties of ceramic and metal powder materials and the methods of their description are addressed. Self‐consistent electromagnetic and thermal models that are capable of predicting the temperature distribution in the microwave‐heated materials and dynamic effects such as thermal runaway instabilities are reviewed. The multiphysics simulations that combine electromagnetic, thermal, and sintering models and result in predicting densification, shrinkage, and grain structure evolution are discussed in detail. The significance of microwave nonthermal effects in sintering is demonstrated based on the experimental results, and the models of such effects are reviewed.

show abstract

Section: Modeling Of Electromagnetic Aspects Of Microwave Sinteringmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microwave Sintering: Fundamentals and Modeling

2013

View full text Add to dashboard Cite

show abstract

“…The microwave sintering process showed appealing results for the densification, 1-8 synthesis, 9 assembling, 10 annealing 11 of various materials and for the achievement of enhanced materials properties. [12][13][14] A wide range of ceramic, [15][16][17][18] metallic, [19][20][21][22][23][24] polymeric, 25,26 composite 27,28 material systems have been successfully fabricated by this technology. Compared to the conventional sintering (utilizing a convective indirect heating [29][30][31] pattern), a volume and direct microwave heating 1,3 of the sample is applicable with potentially high heating rates 32 of about 100 K/min.…”

Section: Introductionmentioning

confidence: 99%

Fully coupled electromagnetic‐thermal‐mechanical comparative simulation of direct vs hybrid microwave sintering of 3Y‐ZrO₂

2017

View full text Add to dashboard Cite

Direct and hybrid microwave sintering of 3Y‐ZrO2 are comparatively studied at frequency of 2.45 GHz. Using the continuum theory of sintering, a fully coupled electromagnetic‐thermal‐mechanical (EMTM) finite element simulation is carried out to predict powder samples deformation during their microwave processing. Direct and hybrid heating configurations are computationally tested using advanced heat transfer simulation tools including the surface to surface thermal radiation boundary conditions and a numeric proportional‐integral‐derivative regulation (PID). The developed modeling framework shows a good agreement of the calculation results with the known experimental data on the microwave sintering of 3Y‐ZrO2 in terms of the densification kinetics. It is shown that the direct heating configuration renders highly hot spot effects resulting in nonhomogenous densification causing processed specimen's final shape distortions. Compared with the direct heating, the hybrid heating configuration provides a reduction of the thermal inhomogeneity along with a densification homogenization. As a result of the hybrid heating, the total densification of the specimen is attained without specimen distortions. It is also shown that the reduction of the sample size has a stabilization effect on the temperature and relative density spatial distributions.

show abstract

“…The sintering process by microwave heating has been studied over the last decades, both in the context of basic research 1 and industrial applications, for various materials such as metals, [2][3][4] ceramics, [5][6][7][8][9] and composites 10,11 . Due to the penetration of the electromagnetic wave into the material, this process offers volumetric heating, selective heating, low energy consumption, and short processing time.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical thermal analysis for direct microwave heating of silicon carbide

et al. 2020

View full text Add to dashboard Cite

A comparison between experiment and numerical simulation of microwave heating of a parallelepipedic silicon carbide (SiC) sample is presented. Using a-2.45 GHz single-mode cavity, the evolution of the surface temperature is first experimentally studied for different orientations of the sample. A finite element analysis of this electromagnetic-thermal coupled problem is then conducted with the COMSOL Multiphysics ® software. Despite the different approximations of our model, a good agreement between experimental and numerical results is found, confirming that the heating of SiC depends only on the electric field. The effect of sample orientations and the cavity length on heating is also highlighted and analyzed.

show abstract

Sintering of Al<sub>2</sub>O<sub>3</sub>-ZrO<sub>2</sub> Composites Using Millimeter-Wave Radiation

Cited by 12 publications

References 0 publications

Microwave Sintering: Fundamentals and Modeling

Microwave Sintering: Fundamentals and Modeling

Fully coupled electromagnetic‐thermal‐mechanical comparative simulation of direct vs hybrid microwave sintering of 3Y‐ZrO₂

Experimental and numerical thermal analysis for direct microwave heating of silicon carbide

Contact Info

Product

Resources

About

Sintering of Al<sub>2</sub>O<sub>3</sub>-ZrO<sub>2</sub> Composites Using Millimeter-Wave Radiation

Cited by 12 publications

References 0 publications

Microwave Sintering: Fundamentals and Modeling

Microwave Sintering: Fundamentals and Modeling

Fully coupled electromagnetic‐thermal‐mechanical comparative simulation of direct vs hybrid microwave sintering of 3Y‐ZrO2

Experimental and numerical thermal analysis for direct microwave heating of silicon carbide

Contact Info

Product

Resources

About

Fully coupled electromagnetic‐thermal‐mechanical comparative simulation of direct vs hybrid microwave sintering of 3Y‐ZrO₂