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Spark Plasma Sintering of fine-grained YAG:Nd+MgO composite ceramics based on garnet-type oxide Y2.5Nd0.5Al5O12 for inert fuel matrices
- Source :
- Materials Chemistry and Physics. 226:323-330
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- Applicability of Spark Plasma Sintering has been studied for production of high-density (98.6–99.5%) composite ceramics Y2.5Nd0.5Al5O12 (YAG:Nd) – x MgO (x = 5, 10, 20 vol %). Powder YAG:Nd-MgO compositions have been obtained by precipitation of the MgO phase from Mg(NO3)2 water solution of magnesium nitrate onto the surface of garnet nanoparticles YAG:Nd. It has been demonstrated that the intensity of sintering fine-grained YAG:Nd-MgO composites is governed by volume diffusion at low temperatures and by grain boundary diffusion at high temperatures. Faster sintering at low temperatures is caused by formation of MgAl2O4 spinel particles and internal stress fields that are manifested as broadening and shifting of garnet peaks in the sintered composites.
- Subjects :
- Materials science
Precipitation (chemistry)
Spinel
Spark plasma sintering
Sintering
Nanoparticle
02 engineering and technology
engineering.material
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
0104 chemical sciences
Magnesium nitrate
chemistry.chemical_compound
chemistry
visual_art
engineering
visual_art.visual_art_medium
Grain boundary diffusion coefficient
General Materials Science
Ceramic
Composite material
0210 nano-technology
Subjects
Details
- ISSN :
- 02540584
- Volume :
- 226
- Database :
- OpenAIRE
- Journal :
- Materials Chemistry and Physics
- Accession number :
- edsair.doi...........6d6382c8574536e58d4f420b88e2c6a0