Stability of plasma-sprayed TiN and ZrN coatings on graphite for application to uranium-melting crucibles for pyroprocessing

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• 作者：Junhyuk Jang ; Ho-Se Lee ; Sungjai Lee
• 关键词：Plasma spraying ; Nitrides ; Graphite ; Uranium ; Pyroprocessing
• 刊名：Journal of Radioanalytical and Nuclear Chemistry
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：310
• 期：3
• 页码：1173-1180
• 全文大小：2,025 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Nuclear Chemistry
  Physical Chemistry
  Nuclear Physics, Heavy Ions and Hadrons
  Diagnostic Radiology
  Inorganic Chemistry
  
• 出版者：Akad茅miai Kiad贸, co-published with Springer Science+Business Media B.V., Formerly Kluwer Academic
• ISSN：1588-2780
• 卷排序：310

文摘

The high-temperature stability of ZrN and TiN coatings deposited by plasma spraying on graphite crucibles for melting uranium was investigated. A layer of mixed Zr (or Ti) oxide and nitride was formed with a thickness of 80–100 μm. The chemical stability was evaluated by a melting test with uranium at 1400 °C. The ZrN layer disappeared after the melting test, but the TiN layer remained stable. The thermal stability was evaluated by heating up to 1400 °C; the surface of the crucible coated with ZrN flaked off after this test, whereas the surface of the crucible coated with TiN remained almost intact.