Microwave sintering of 8mol% yttria–zirconia (8YZ): An inert matrix material for nuclear fuel applications

Thridandapani, Raghunath R.; Folgar, Carlos; Folz, D. C.; Clark, David E.; Wheeler, Krista K.; Peralta, Pedro

doi:10.1016/j.jnucmat.2008.11.010

Cited by 20 publications

(19 citation statements)

References 15 publications

(24 reference statements)

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“…Commercially available spray‐dried agglomerates of 8YZ (Tosoh Corporation, Grove City, OH) produced through a hydrolysis process were used for this study. The powder characterization and the compaction behavior for these powders have been reported previously . The starting compacts had an initial density of 46 % theoretical density (theoretical density of 8YZ = 5.96 g/cc).…”

Section: Methodsmentioning

confidence: 93%

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Estimation of Activation Energies for Sintering 8 mol % Yttria‐Zirconia Using Conventional and Microwave Heating

Thridandapani

Folz

Clark

2013

Int J Applied Ceramic Tech

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The activation energies were estimated for conventional and microwave sintering of Zirconia‐8 mol% Yttria (8YZ). The results were analyzed to explain the mechanisms responsible for enhancing flux/mass transport during microwave sintering. The activation energies were evaluated using isothermal and nonisothermal methods. The nonisothermal sintering resulted in higher values of activation energies, as compared to isothermal methods. This behavior may be due to the presence of more than one type of diffusion mechanism dominating throughout the process. The nonisothermal method represented activation energy values close to a single densification mechanism (either volume or grain boundary diffusion). A value of 500 ± 25 kJ/mol was observed for nonisothermal sintering of 8YZ with conventional heating. This value was close to the volume diffusion of Zr+4 ion (500 kJ/mol). The microwave sintering (using nonisothermal method) resulted in activation energy values of 200 ± 27 kJ/mol, a value close to the grain boundary diffusion of the Zr+4 ion.

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Section: Methodsmentioning

confidence: 93%

“…The powder characterization and the compaction behavior for these powders have been reported previously. 15 The starting compacts had an initial density of 46 % theoretical density (theoretical density of 8YZ = 5.96 g/cc). Sintering experiments were performed in air using a dilatometer.…”

Section: Methodsmentioning

confidence: 99%

Estimation of Activation Energies for Sintering 8 mol % Yttria‐Zirconia Using Conventional and Microwave Heating

Thridandapani

Folz

Clark

2013

Int J Applied Ceramic Tech

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“…It was observed that MHH resulted in rapid sintering of 8YZ at low temperatures. 26 The objective of the current research is to understand the effect of direct microwave sintering (without any hybrid setup) on densification behavior, microstructure evolution, and the resulting properties.…”

Section: Microwave Sinteringmentioning

confidence: 99%

“…A detailed analysis of composition, powder characterization, and pellet fabrication has been discussed previously. 26…”

Section: Materials Selection and Pellet Fabricationmentioning

confidence: 99%

Effect of Direct Microwave Sintering on Structure and Properties of 8 Mol% Y2O3-ZrO2

Thridandapani

Folgar

Kulp

et al. 2011

International Journal of Applied Ceramic Technology

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Fully stabilized‐zirconia is proposed as an inert matrix for next‐generation nuclear fuels. This study presents the application of microwave technology for lowering the sintering temperature of 8 mol% yttria–zirconia (8YZ) to minimize the loss of volatile actinides that will be incorporated into the fuels. Direct microwave sintering results were compared with microwave‐hybrid and conventionally sintered samples. Direct Microwave Sintering of 8YZ showed a reduction of 300°C in temperature required for full densification when compared with conventional sintering. A difference of 200°C was observed with microwave‐hybrid sintering. Despite these differences in processing temperatures, the variations in resulting properties were negligible.

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“…Mazaheri et al (2008) used microwave sintering, and achieved 96% density for 8YSZ sample. Microwave sintering has been performed by many researchers for different 8YSZ applications (Ciacchi et al, 1996;Upadhyaya et al, 2001;Thridandapani et al, 2009;Janney et al, 1992). Microwave sintering is a more advanced sintering technique than conventional sintering.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of microwave sintered 8 mol% yttria stabilized zirconia

Babu¹,

Manohar²

2013

Int. J. Phys. Sci.

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This paper reports the synthesis and characteristics of nano sized 8 mol% yttria stabilized zirconia (8YSZ). The nano sized 8YSZ powder (15 nm) has been prepared by the sol-gel technique. The phase formation was confirmed by the X-Ray Diffraction (XRD) analysis and the particle size verified by transmission electron microscope (TEM). The prepared 8YSZ green samples were sintered in a microwave furnace at 1500°C for three different holding times, such as 5, 10 and 15 min. The density of the sintered samples was measured with the Archimedes method. This method revealed 98% of theoretical density of the 8YSZ sample. The surface morphology of the sintered samples was examined by the scanning electron microscope (SEM). The mechanical properties, including nanohardness, elastic modulus and coefficient of friction of the high density sample have been evaluated.

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Microwave sintering of 8mol% yttria–zirconia (8YZ): An inert matrix material for nuclear fuel applications

Cited by 20 publications

References 15 publications

Estimation of Activation Energies for Sintering 8 mol % Yttria‐Zirconia Using Conventional and Microwave Heating

Estimation of Activation Energies for Sintering 8 mol % Yttria‐Zirconia Using Conventional and Microwave Heating

Effect of Direct Microwave Sintering on Structure and Properties of 8 Mol% Y2O3-ZrO2

Mechanical properties of microwave sintered 8 mol% yttria stabilized zirconia

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