Ion irradiation induced order-to-disorder transformation in δ-phase Lu4Hf3O12

Wen, Juan; Gao, Cankun; Li, Y.H.; Wang, Y.Q.; Zhang, L.M.; Hu, Bitao; Chen, L.J.; Su, Xuping

doi:10.1016/j.nimb.2013.04.055

Cited by 8 publications

(2 citation statements)

References 24 publications

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“…Each O layer is analogous to a 6/7 dense (partially-dense) 3 4 Á6 Archimedean tiling compared to a 7/7 (fully-dense) triangular atom net M layer. Several previous studies concluded that the order-to-disorder phase transformation of d-phase compound is attributed to the effects of anion oxygen Frenkel-pair defects [16,19,[27][28][29]. It is reasonable to assume that the order-to-disorder phase transformation in d-Sc 4 Hf 3 O 12 is also due to anion oxygen Frenkel-pair defect.…”

Section: Discussionmentioning

confidence: 97%

Heavy and light ion irradiation damage effects in δ-phase Sc4Hf3O12

Wen

Tang

et al. 2015

Nuclear Instruments and Methods in Physics Research Section B:

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a b s t r a c tPolycrystalline d-phase Sc 4 Hf 3 O 12 was irradiated with light and heavy ions to study the radiation stability of this compound. In order to explore the ion species spectrum effect, the irradiations were performed with 400 keV Ne 2+ ions to fluences ranging from 1 Â 10 14 to 1 Â 10 15 ions/cm 2 , 600 keV Kr 3+ ions to fluences ranging from 5 Â 10 14 to 5 Â 10 15 ions/cm 2 , and 6 MeV Xe 26+ ions to fluences ranging from 2 Â 10 13 to 1 Â 10 15 ions/cm 2 . Irradiated samples were characterized by various techniques including grazing incidence X-ray diffraction (GIXRD) and transmission electron microscopy (TEM). A complete phase transformation from ordered rhombohedral to disordered fluorite was observed by a fluence of 1 Â 10 15 ions/cm 2 with 400 keV Ne 2+ ions, equivalent to a peak ballistic damage dose of $0.33 displacements per atom (dpa). Meanwhile, the same transformation was also observed by 600 keV Kr 3+ ions at the same fluence of 1 Â 10 15 ions/cm 2 , which however corresponds to a peak ballistic damage dose of $2.2 dpa. Only a partial O-D transformation was observed for 6 MeV Xe 26+ ions in the fluence range used. Experimental results indicated that the O-D transformation is observed under both electronic and nuclear stopping dominant irradiation regimes. It was also observed that light ions are more efficient than heavy ions in producing the retained defects that are presumably responsible for the O-D phase transformation. The O-D transformation mechanism is discussed in the context of anion oxygen Frenkel defects and cation antisite defects. We concluded that the irradiation induced O-D transformation is easier to occur in d-phase compounds with partial order of cations than in that with fully disordered cation structures.

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Section: Discussionmentioning

confidence: 97%

Heavy and light ion irradiation damage effects in δ-phase Sc4Hf3O12

Wen

Tang

et al. 2015

Nuclear Instruments and Methods in Physics Research Section B:

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“…The structural characteristics of several irradiated δphases [19][20][21][22][23][24][25][26] were studied and the common conclusion was the observation of a phase transformation towards an apparent disordered fluorite phase. The most comprehensive among these studies [20,21] also discuss the qualitative formation of a bixbyite-like phase in lowenergy irradiated δ-Sc 4 Zr 3 O 12 .…”

Section: Introductionmentioning

confidence: 99%

Divergent short- and long-range behavior in ion-irradiatedδ−Sc4Hf3O12

Patel

Sickafus

Baldinozzi

2020

Phys. Rev. Materials

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Ion irradiation experiments and quantitative x-ray diffraction analysis were used to demonstrate that the lattice and structure behave very differently in a complex oxide, δ-Sc4Hf3O12, under irradiation. Analysis of the structure reveals that with increasing fluence, the characteristic c/a ratio for δ-phase converges to that of an ideal fluorite phase, whereas locally it produces a metaphase consisting of frozen nanoscale structures having bixbyite-like flavor that increase the overall stability and radiation response of the apparent long-range oxygen-deficient average fluorite structure.

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