Preparation of coated Li2TiO3 and Li4SiO4 pebbles by fluidized bed chemical vapor deposition for advanced tritium breeders
Preparation of coated Li2TiO3 and Li4SiO4 pebbles by fluidized bed chemical vapor deposition for advanced tritium breeders
复制标题
流化床化学气相沉积法制备先进氚增殖剂包覆Li2TiO3和Li4SiO4卵石
DOI：
10.1016/j.fusengdes.2021.112245
复制
发表时间：
2021-01-18
影响因子：
1.7
通讯作者：
Yue, Fen
中科院分区：
文献类型：
--
作者：
Xiang, Maoqiao;Zheng, Jie;Yue, Fen
锂基陶瓷氚增殖剂会对包层结构材料产生侵蚀，产生脆性腐蚀层，存在安全隐患。在此，提出了涂层增殖剂作为先进的氚增殖剂来解决这个问题。碳（C）、氮化钛（TiN）和碳化钛（TiC）作为惰性保护壳被研究，因为它们显示出优异的稳定性和与Li2TiO3和Li4SiO4的化学相容性。此外，首次采用流化床化学气相沉积（FBCVD）工艺成功制备了C和TiN包覆的Li2TiO3和Li4SiO4微球，显著减少了微球的脆性腐蚀层，提高了微球的安全性。系统研究了沉积行为和界面反应。
Lithium-based ceramic tritium breeders would attack the blanket structural materials and produce brittle corrosion layers, causing potential safety hazard. Herein, coated breeders were proposed as advanced tritium breeders to address the issue. Carbon (C), titanium nitride (TiN) and titanium carbide (TiC) were investigated as inert protective shells because they show excellent stability and chemical compatibility with Li2TiO3 and Li4SiO4. Moreover, for the first time, the C and TiN coated Li2TiO3 and Li4SiO4 pebbles were successfully fabricated by fluidized bed chemical vapor deposition (FBCVD) process, which would significantly decrease the brittle corrosion layers and increase the safety. The deposition behavior and interface reactions were systemically investigated.