Thermodynamic behavior of 57Fe implanted into ZrO2 (Y) by CEMS and slow positron beam

Thermodynamic behavior of ⁵⁷Fe implanted into ZrO₂ (Y) by CEMS and slow positron beam

Zhang Gui-Lin，

Yu Fang-Hua，

Weng Hui-Min，

Zhang Xing-Hua

Nuclear Science and Techniques

Vol.7, No.4

pp.220-224

Published in print 01 Nov 1996

53500

Using conversion electron Mössbauer spectroscopy (CEMS) and slow positron beam, the chemical state of ⁵⁷Fe ( 100keV, 3 ×10¹⁶ cm^-2) implanted into ZrO₂ containing 0.03 mole fraction Y₂O₃ (ZY₃) and its thermodynamic behavior during annealing process at 200 ~ 500℃ are studied. For as-implanted sample, Fe chemical states of Fe⁰, Fe²⁺ and Fe³⁺ are observed, and assigned to the superparamagnetic metallic iron cluster, iron dimer (and trimer) and complex of the Fe³⁺ associated with cation vacancy (V) and oxygen, respectively. After annealing at 400℃ the complexes of Fe³⁺-V are mostly dissolved, and the prior phase to α-Fe and α-Fe nano- crystalline cluster are present in the sample. Meanwhile the mixed conducting of oxygen-ions and electrons in the ZY₃ sample containing Fe appears, it may correlate with the different iron charge states and their relative amounts, in particular with the α-Fe nano-granule.

57Fe ion beamα-FeNano-granuleConversion electron Mössbauer spectroscopyPositron annihilation Doppler broadening spectra

References

Weller M, Schubert H. J Am Ceram Soc, 1986; 69: 573

Burggraaf A J, Scholten D, van Hassel B A. Nucl Instru Meth, 1988; B32: 32

Marest G, Donnet C, Sawicki J A. Hyper Inter, 1990; 56: 1605

Weng Hui-Min, Guo Xuc-Zhe, Han Rong-Dia et al. Nucl Instr and Meth, 1991; A307: 577

Sawicki J A, Marest G, Cox B et al. Nucl Instru and Meth, 1988; B32: 79

Mchargue C J, Farlow G C, Sklad P S et al. Nucl Instr and Meth, 1987; B19/20: 813

Perez A, Marest G, Sawickw B D et al. Phys Rev, 1983: B28: 1227

Gourdin W II, Kingery W D, J Mater Sci, 1979; 14: 2074

Zhang G L, Liu L F, Hu W.X et al. Phys Lett, 1986; A119: 251

Forster M, Mundy J N, Schaefer H E. In: Positron annihilation, 8th ICPA, Singapore: World Scientific, 1989; 833

Shaefer H E, Forster M. Mater Sci Eng. 1989; A109: 161

Groves G E, Fine M E. J Appl Phys, 1964; 35: 3587

Zhang G L, Andreasen H, Boerma D D et al. Phys Rev, 1989; B39: 1068

Miyayama Masuru, Yanagida Hiroaki, Asala Akiyoshi. Am Ceram Soc Bull, 1985; 64: 660

Liou S S, Woreell W L. Appl Phys, 1989; A49: 25

Zheng Y M.

An analysis of the phase structure in ZrO2 by Mössbauer spectroscopy and electric conductivity measurement for Fe-Y-ZrO2

. Master thesis, Shanghai University of Science and Technology, 1993

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