Relation of containment capacity with phase composition, density and Vickers hardness of simulated waste forms Gd2-xNdxZr2O7(Nd=An(Ⅲ), 0≤ x ≤ 2.0)

Duan Tao; Lu Xi-Rui; Liu Xiao-Nan; Zhu Wen-Kun; Huang Ye-Ju

doi:10.7498/aps.61.212801

Abstract

In order to investigate the capability of Gd2Zr2O7 pyrochlore as a waste form for immobilizing trivalent actinides nuclides, Nd(Ⅲ) is used as an alternative substance for An(Ⅲ). The compounds in the system Gd2-xNdxZr2O7 (0≤ x ≤ 2.0) are synthesized at 1500 ℃ for 72 h by high temperature solid state reaction method, using Gd2O3 and ZrO2 powders as the raw materials. The phase, intensity, Vickers hardness and microcosmic shape are characterized by X-ray diffraction, Vickers hardness tester, scanning electron microscopy and so on. The results indicate that the phase of synthesized waste form with plate-shape keeps the phase of pyrochlore. The intensity of compound slightly decreases with the increase of the containment capacity value x, but it is above 5.76 g·cm-3. The value of Vickers hardness also decreases with the increase of x. The values of x and Vickers hardness are linearly related by HV=695.18636-162.64091 x (HV≥ 400 kg·mm-2).

Keywords:

Authors and contacts

1.
Fundament on Nuclear Waste and Environmental Security Laboratory, Southwest University of Science and Technology, Mianyang 621010, China;
2.
Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology, Mianyang 621010, China
Funds: Project supported by the National Natural Science Foundation of China (Grant Nos. 51074131, 21007052), and the Fundament on Nuclear Waste and Environmental Security Laboratory, China (Grant No. 11zxnk09).

References

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Cited By

[1]	Amin Y M 1989 Nucl. Instrum. Methods Phys. Res. 280 314
[2]	Nasdala L, Irmer G, Wolf D 1995 Eur. J. Mineral. 7 471
[3]	Weber W J 1991 Radiation Effects and Defects in Solids 115 341
[4]	Clarke D R 1983 Ann. Rev. Mater. Sci. 13 191
[5]	Robert L E J 1990 Annu. Rev. Part. Sci. 40 79
[6]	Wang S X, Begg B D, Wang L M, Ewing R C, Weber W J, Govidan Kutty K V 1999 J. Mater. Res. 14 4470
[7]	Weber W J, Ewing R C 2000 Science 289 2051
[8]	Sickafus K E, Minervini L, Grimes R W 2000 Science 289 748
[9]	Ewing R C, Weber W J, Lian J 2004 J. Appl. Phys. 95 5949
[10]	Chen J, Lian J, Wang L M, Ewing R C 2001 Appl. Phys. Lett. 79 1989
[11]	Lian J, Wang L M, Chen J, Sun K, Ewing R C, Farmer J M, Boatner L A 2003 Acta Mater. 51 1493
[12]	Lian J, Wang L M, Haire R G, Helean K B, Ewing R C 2004 Nucl. Instrum. Methods Phys. Res. B 218 236
[13]	Lian J, Ewing R C, Wang L M, Helean K B 2004 J. Mater. Res. 19 1575
[14]	Zhang F X, Lian J, Zhang J M, Moreno K J, Fuentes A F, Wang Z W, Ewing R C 2010 Journal of Alloy and Compounds 494 34
[15]	Pan Z L 1993 Crystallography and Mineralogy (Vol. 1) (Beijing: Geology Press) p152 (in Chinese) [潘兆鲁 1993 结晶学及矿物学(上) (北京: 地质出版社) 第152页]

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Vol. 61, Issue 21 - 2012-11-05

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