Scholarlink

<p>In this work, the influence of high-energy He<sup>+</sup> ion irradiation on the dose- and depth-dependent evolution of open-volume defects (vacancies, vacancy clusters, and He–vacancy complexes) in a ZrO<sub>2</sub>-Fe ceramic composite sample containing 4 wt% Fe was investigated using a multi-method approach. The samples were irradiated at the EG-5 accelerator with a 2.0&#xa0;MeV He<sup>+</sup> beam over a fluence range of 2 × 10<sup>14</sup>–2 × 10<sup>17</sup> ions/cm<sup>2</sup>. The depth profile of defects was assessed by variable-energy Doppler broadening spectroscopy (DBS), and the transformation of trapping environments was monitored via S–W correlation analysis. Positron Annihilation Lifetime Spectroscopy (PALS) results reveal two lifetime components in all samples and confirm the strengthening of large open-volume traps with increasing fluence: τ₂ increases from 0.385 ns to 0.445 ns, while I<sub>2</sub> rises from 68.23% to 80.91%. In the EMD ratio spectra, the shift of the main maximum indicates an irradiation-induced change in the electron-structural characteristics of the annihilation environment. In Raman spectra, the pronounced weakening and near extinction of monoclinic ZrO<sub>2</sub>-related bands at high fluence is consistent with a strong increase in local structural disorder and a possible tendency toward local amorphization, as interpreted together with the PAS indicators. Overall, this approach is practically instructive for regulating depth-wise stability through defect engineering in ZrO<sub>2</sub>–Fe functional/coating materials operating in radiation environments.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Study of defect formation mechanisms in ZrO2–Fe ceramic composites under high-energy He+ Ion irradiation

  • 期刊论文

  • 发表日期：

    2026年6月15日

查看全文
  • S. F. Samadov,
  • A. A. Sidorin,
  • E. A. Korneeva,
  • N. V. Tiep,
  • O. S. Orlov,
  • N. V.M. Trung,
  • R. Sh. Isayev,
  • O. A. Samedov,
  • Y. I. Aliyev,
  • A. S. Abiyev

摘要

In this work, the influence of high-energy He+ ion irradiation on the dose- and depth-dependent evolution of open-volume defects (vacancies, vacancy clusters, and He–vacancy complexes) in a ZrO2-Fe ceramic composite sample containing 4 wt% Fe was investigated using a multi-method approach. The samples were irradiated at the EG-5 accelerator with a 2.0 MeV He+ beam over a fluence range of 2 × 1014–2 × 1017 ions/cm2. The depth profile of defects was assessed by variable-energy Doppler broadening spectroscopy (DBS), and the transformation of trapping environments was monitored via S–W correlation analysis. Positron Annihilation Lifetime Spectroscopy (PALS) results reveal two lifetime components in all samples and confirm the strengthening of large open-volume traps with increasing fluence: τ₂ increases from 0.385 ns to 0.445 ns, while I2 rises from 68.23% to 80.91%. In the EMD ratio spectra, the shift of the main maximum indicates an irradiation-induced change in the electron-structural characteristics of the annihilation environment. In Raman spectra, the pronounced weakening and near extinction of monoclinic ZrO2-related bands at high fluence is consistent with a strong increase in local structural disorder and a possible tendency toward local amorphization, as interpreted together with the PAS indicators. Overall, this approach is practically instructive for regulating depth-wise stability through defect engineering in ZrO2–Fe functional/coating materials operating in radiation environments.