کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1445184 1509574 2016 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Multi-scale simulation of the experimental response of ion-irradiated zirconium carbide: Role of interstitial clustering
ترجمه فارسی عنوان
شبیه سازی چند متغیری از پاسخ تجربی کاربید زیرکونیوم تابش شده یون: نقش خوشه بندی بینابینی
کلمات کلیدی
کاربید زیرکونیوم، اشعه یون نرخ پویایی خوشه معادله، خوشه های بینابینی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
چکیده انگلیسی

The response of zirconium carbide to heavy-ion irradiation at room temperature has been studied by X-ray diffraction, ion channeling and transmission electron microscopy. Below 5 × 1014 cm−2, we observe a build-up of elastic strain with increasing fluences. At this threshold fluence the strain is released and important dechanneling appears as well as visible TEM damage. With increasing fluence, this damage is found to spread in the material deeper than the depth of direct damaging by the ion beam. These experimental observations are reproduced and explained by Density Functional Theory informed Rate Equation Cluster Dynamics simulations. Simulations show that the response of ZrC upon ion-irradiation is driven by the diffusion and clustering of interstitials. The two-step evolution seen in experiments stems from the growth of interstitial clusters with a concomitant starvation of the smallest clusters induced by the continuous accumulation of vacancies. The damaging of the material beyond the range of primary damage is driven by diffusion of interstitials.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 102, 1 January 2016, Pages 79–87
نویسندگان
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