UO2 beads from the sol supported precipitation method were calcined at a low temperature in order to obtain porous micro-beads, composed of nanometric particles. The sintering behaviour of the beads in spark plasma sintering was investigated. The powder had a good sinterability and the final grain size of the pellets could be tailored by varying the processing conditions, in order to resemble the microstructure of the traditionally fabricated UO2 pellets (i.e. grains of several µm size), or to achieve sub-micrometre size as observed in the high burnup structure. Dense UO2 pellets with a grain size as small as 300 nm were obtained by sintering at 835°C without dwell time, whereas 3 µm grained pellets were obtained at 1000°C and 5 min dwell time.
COLOGNA Marco;
TYRPEKL Vaclav;
ERNSTBERGER Markus;
STOHR Sarah;
SOMERS Joseph;
2016-05-04
ELSEVIER SCI LTD
JRC97793
0272-8842,
http://dx.doi.org/10.1016/j.ceramint.2015.12.172,
https://publications.jrc.ec.europa.eu/repository/handle/JRC97793,
10.1016/j.ceramint.2015.12.172,
| Name | Country | City | Type |
|---|
This document is only visible at the Commission level.
You are not authorized to publish or distribute it outside the European Commission.
This is a public document. You can share this publication.
Datasets
| ID | Title | Public URL |
|---|
Dataset collections
| ID | Acronym | Title | Public URL |
|---|
Scripts / source codes
| Description | Public URL |
|---|
Additional supporting files
| File name | Description | File type |
|---|