Issue 35, 2013
From the journal:

RSC Advances

Tailoring the radiation tolerance of vanadate–phosphate fluorapatites by chemical composition control

Fengyuan Lu,a   Zhili Dong,b   Jiaming Zhang,c   Timothy White,b   Rodney C. Ewingc  and  Jie Lian*a  

* Corresponding authors

a Department of Mechanical, Aerospace & Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, U.S.A
E-mail: lianj@rpi.edu
Fax: +1 518-276-6025
Tel: +1 518-276-6081

b School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798

c Departments of Earth & Environmental Sciences and Materials Science & Engineering, University of Michigan, Ann Arbor, MI 48109-1005, U.S.A

Abstract

The apatite-type structure of AI4AII6(BO4)6(OH, F, Cl)2 (AI, AII = Ca, Na, rare earths, fission product elements such as I and Tc, and/or actinides; B = Si, P, V, or Cr) offers unique structural advantages as an advanced nuclear waste form because a wide variety of actinides and fission products can be incorporated into the structure through coupled cation and anion substitutions. However, apatite undergoes a radiation-induced crystalline-to-amorphous transition, and previously, the effect of composition on the radiation-induced transformation has not been well understood. In this study, we demonstrate that vanadate–phosphate fluorapatite's radiation tolerance can be controlled by varying the composition. Enhanced radiation tolerance is achieved by replacing vanadium with phosphorus at the B-site or by replacing Pb with Ca at the A-site. Correlations among chemical composition, radiation performance and electronic to nuclear stopping power ratio were demonstrated and suggest that the ionization process resulting from electronic energy loss may enhance annealing of defects upon radiation damage.

Graphical abstract: Tailoring the radiation tolerance of vanadate–phosphate fluorapatites by chemical composition control

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Article information

DOI
https://doi.org/10.1039/C3RA42246A
Article type
Paper
Submitted
07 May 2013
Accepted
12 Jun 2013
First published
13 Jun 2013

RSC Adv., 2013,3, 15178-15184

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Tailoring the radiation tolerance of vanadate–phosphate fluorapatites by chemical composition control

F. Lu, Z. Dong, J. Zhang, T. White, R. C. Ewing and J. Lian, RSC Adv., 2013, 3, 15178 DOI: 10.1039/C3RA42246A

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