Evidence of a phase transition induced in zirconia by high energy heavy ions

Benyagoub, A.; Lévesque, François; Couvreur, F.; Gibert-Mougel, C.; Dufour, C.; Paumier, E.

doi:10.1063/1.1326483

Cited by 87 publications

(62 citation statements)

References 12 publications

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“…For the sample irradiated with 1×10 13 U-ions/cm 2 , e.g., the tetragonal fraction is limited to (90.1 ± 4.4) %. In agreement with previous measurements [9,5], the transformation from monoclinic to tetragonal is obviously never complete. It is important to point out that the tetragonal structure of ZrO 2 obtained by simple temperature increase is not stable at room temperature.…”

Section: Irradiations At Ambient Pressuresupporting

confidence: 80%

“…The ortho-I-to-ortho-II transformation requires a significant reorganization of the cation and anion sublattices, increasing the coordination number of Zr 4+ from seven to nine, and therefore the transformation kinetics are slowed down to the point of being irreversible at room temperature [21]. At ambient pressure, the radiation response of zirconia has been studied extensively for low-energy ions at room [30,31,32,33] and cryogenic [13] temperatures, as well as for swift heavy ions [5,34,35,36,37,38,39]. All cited experiments showed that for very high ion fluences a structural phase transition from the monoclinic to the high-temperature tetragonal phase occurs.…”

Section: Introductionmentioning

confidence: 99%

“…Ion tracks are characterized by severe chemical, physical, and structural modifications. In non-amorphisable crystals, the track region contains numerous lattice defects [3,4] and/or has undergone a transition to a different crystalline phase [5]. Until recently, most irradiations were performed at ambient pressure conditions.…”

Section: Introductionmentioning

confidence: 99%

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Response behavior of ZrO2 under swift heavy ion irradiation with and without external pressure

Schuster

Fujara

Merk

et al. 2012

Nuclear Instruments and Methods in Physics Research Section B:

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In this study, we demonstrate that the combination of relativistic heavy ions with pressure can influence the phase behavior of ZrO 2 in ways none of those two extreme conditions alone could. The response behavior of ZrO 2 towards ion irradiation under different pressure conditions is investigated. ZrO 2 exposed to energetic particles is known to undergo a crystalline-to-crystalline phase transition from the monoclinic to the tetragonal phase. In agreement with earlier findings, this structural change requires also for heaviest ions, such as Au, Pb, and U, a multiple ion impact. If the irradiation is performed under high pressure, the monoclinic-to-tetragonal transformation occurs at a fluence that is more than one order of magnitude lower suggesting a single impact process. Raman measurements at ambient conditions and X-ray diffraction analysis of the samples irradiated under pressure revealed that the monoclinic-to-tetragonal transformation under pressure is not a direct process but involves a transition into the cubic high-temperature structure, before the tetragonal structure becomes stable under decompression. At even higher pressures, the additional ion irradiation forces ZrO 2 to transform to the higher orthorhombic-II phase that is far away from its stability field. straße

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Section: Irradiations At Ambient Pressuresupporting

confidence: 80%

Section: Introductionmentioning

confidence: 99%

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Response behavior of ZrO2 under swift heavy ion irradiation with and without external pressure

Schuster

Fujara

Merk

et al. 2012

Nuclear Instruments and Methods in Physics Research Section B:

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“…The Θ E and σ 2 s values for bulk HCP Co, bulk FCC Co and FCC NPs given in Table 8 Earlier observations of swift heavy ion irradiation-induced phase transformations in bulk metals [91] and oxides [92,93] differ from the transformation reported herein. For example, Benyagoub et al observed the transformation in zirconia and hafnia from a phase stable at ambient conditions to a high-temperature/high-pressure phase intuitively consistent with a rapid, post-thermal-spike quench [92,93]. In contrast, Figures 17-21 demonstrate the opposite for Co NPs where an irradiation-induced transformation from FCC (stable at high-temperature/high-pressure in bulk material) to HCP (stable at ambient conditions in bulk material) is apparent.…”

Section: Resultscontrasting

confidence: 41%

Ion Beam Formation and Modification of Cobalt Nanoparticles

Sprouster

Ridgway

2012

Applied Sciences

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This article reviews the size-dependent structural properties of ion beam synthesized Co nanoparticles (NPs) and the influence of ion irradiation on the size, shape, phase and structure. The evolution of the aforementioned properties were determined using complementary laboratory-and advanced synchrotron-based techniques, including cross-sectional transmission electron microscopy, small-angle X-ray scattering and X-ray absorption spectroscopy. Combining such techniques reveals a rich array of transformations particular to Co NPs. This methodology highlights the effectiveness of ion implantation and ion irradiation procedures as a means of fine tuning NP properties to best suit specific technological applications. Furthermore, our results facilitate a better understanding and aid in identifying the underlying physics particular to this potentially technologically important class of nanomaterials.

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“…1͑a͒. It has been shown [2][3][4][5][6] that when S e is above a certain intrinsic threshold S th a latent ͑amorphous͒ track of nanometer diameter is generated along each ion trajectory ͑thresholding behavior͒ following ion impact. The diameter has been shown to increase monotonically with stopping power.…”

Section: Introductionmentioning

confidence: 99%

Synergy between thermal spike and exciton decay mechanisms for ion damage and amorphization by electronic excitation

et al. 2006

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A theoretical model is proposed to account for the damage and amorphization induced in LiNbO 3 by ion bombardment in the electronic energy-loss regime. It relies on the synergy between the thermal spike generated by electron-phonon interaction and the nonradiative decay of localized ͑self-trapped͒ excitons. Calculations have been carried out to describe the effect of single impact as well as multiple impact ͑high fluence͒ irradiations. In the first case, the defect concentration profile and the radius of the amorphous tracks have been theoretically predicted and they are in good accordance with those experimentally determined. For high fluence irradiations ͑Ն10 13 cm −2 ͒ the model predicts the formation of homogeneous amorphous surface layers whose thickness increases with fluence. The propagation of the crystalline-amorphous boundary has been determined as a function of irradiation fluence. Theoretical predictions are also in good agreement with experimental data on Si-irradiated ͑7.5 and 5 MeV͒ LiNbO 3 outside the region of nuclear collision damage.

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Evidence of a phase transition induced in zirconia by high energy heavy ions

Abstract: Stress field induced by swift heavy ion irradiation in cubic yttria stabilized zirconia

Cited by 87 publications

References 12 publications

Response behavior of ZrO2 under swift heavy ion irradiation with and without external pressure

Response behavior of ZrO2 under swift heavy ion irradiation with and without external pressure

Ion Beam Formation and Modification of Cobalt Nanoparticles

Synergy between thermal spike and exciton decay mechanisms for ion damage and amorphization by electronic excitation

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