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

Abstract

X-ray diffraction (XRD) was used to investigate the damage and the correlated stress induced by the slowing down of swift heavy ions in cubic zirconia polycrystals doped with 10 mol % Y2O3. Samples were irradiated at room temperature with 940 MeV Pb ions at fluences ranging from 5×1011 to 4×1013 cm−2. Changes of XRD profiles were examined at increasing fluences. Residual macroscopic stresses induced by irradiation were determined using XRD by the “sin2 ψ method.” The state of stress in the irradiated layer was described by a combination of: (i) a hydrostatic stress caused by the formation of damaged tracks leading to swelling and (ii) a biaxial stress imposed by the bulk undamaged material, which controls the lateral expansion of the surface damaged layer. The evolution of the stress as a function of irradiation fluence was also determined: the intensity of the hydrostatic stress increases from 80 to 460 MPa when the fluence is increased from 5×1011 to 4×1013 cm−2 and that of the biaxial stress increases correlatively from −80 to −1630 MPa.

Comprehensive study of the effect of the irradiation temperature on the behavior of cubic zirconia

“…Moreover, YSZ exhibits a very high radiation resistance, suggesting potential use as an IMF. This radiation resistance has been demonstrated in a series of experimental studies where the irradiation environment has been simulated with external ion beams [5][6][7][8][9][10][11][12] or also via computational approaches. [13][14][15] All works put forward that YSZ maintains its structural integrity up to very high irradiation levels ($100 displacements per atom, dpa).…”

Mechanical properties of cubic zirconia irradiated with swift heavy ions

“…In fact the strengthening of YSZ is only apparent; besides radiation defects, irradiation with an ion beam creates a residual stress field in the surface region of the target. In a previous paper [31], the residual stresses induced by irradiation on similar YSZ polycrystals irradiated with 940 MeV Pb ions were examined by XRD using the 'sin 2 w method'. The analysis of experimental data was performed by means of a triaxial stress model.…”

Effect of swift heavy ion on structural and optical properties of highly transparent zinc oxide films

“…Thermal spike model says that: SHI transfers the energy to free electron, these free electron transfer energy to lattice, and at cooling the atoms are displaced from their position due to which track is produced [14,15]. Thus, the SHI modifies the properties of any material by creating defects [16], stress and strain in the structure [17]. Therefore, in the present paper, SHI irradiation has been used to create stress and defect for modifying the structural and optical properties of ZnO film grown by the sol-gel spin-coating technique.…”