Adsorption Behaviors of Cobalt on the Graphite and SiC Surface: A First-Principles Study
المؤلفون المشاركون
Cao, Jianzhu
Li, Chuan
Fang, Chao
Wang, Wenyi
المصدر
Science and Technology of Nuclear Installations
العدد
المجلد 2017، العدد 2017 (31 ديسمبر/كانون الأول 2017)، ص ص. 1-8، 8ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2017-03-20
دولة النشر
مصر
عدد الصفحات
8
الملخص EN
Graphite and silicon carbide (SiC) are important materials of fuel elements in High Temperature Reactor-Pebble-bed Modules (HTR-PM) and it is essential to analyze the source term about the radioactive products adsorbed on graphite and SiC surface in HTR-PM.
In this article, the adsorption behaviors of activation product Cobalt (Co) on graphite and SiC surface have been studied with the first-principle calculation, including the adsorption energy, charge density difference, density of states, and adsorption ratios.
It shows that the adsorption behaviors of Co on graphite and SiC both belong to chemisorption, with an adsorption energy 2.971 eV located at the Hollow site and 6.677 eV located at the hcp-Hollow site, respectively.
Combining the charge density difference and density of states, it indicates that the interaction of Co-SiC system is stronger than Co-graphite system.
Furthermore, the variation of adsorption ratios of Co on different substrate is obtained by a model of grand canonical ensemble, and it is found that when the temperature is close to 650 K and 1700 K for graphite surface and SiC surface, respectively, the Co adatom on the substrate will desorb dramatically.
These results show that SiC layer in fuel element could obstruct the diffusion of Co effectively in normal and accidental operation conditions, but the graphite may become a carrier of Co radioactivity nuclide in the primary circuit of HTR-PM.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Wang, Wenyi& Li, Chuan& Cao, Jianzhu& Fang, Chao. 2017. Adsorption Behaviors of Cobalt on the Graphite and SiC Surface: A First-Principles Study. Science and Technology of Nuclear Installations،Vol. 2017, no. 2017, pp.1-8.
https://search.emarefa.net/detail/BIM-1203793
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Wang, Wenyi…[et al.]. Adsorption Behaviors of Cobalt on the Graphite and SiC Surface: A First-Principles Study. Science and Technology of Nuclear Installations No. 2017 (2017), pp.1-8.
https://search.emarefa.net/detail/BIM-1203793
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Wang, Wenyi& Li, Chuan& Cao, Jianzhu& Fang, Chao. Adsorption Behaviors of Cobalt on the Graphite and SiC Surface: A First-Principles Study. Science and Technology of Nuclear Installations. 2017. Vol. 2017, no. 2017, pp.1-8.
https://search.emarefa.net/detail/BIM-1203793
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1203793
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر