流化床-化学气相沉积(FB-CVD)法制备细晶SiC包覆层
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- 英文论文题名：Preparation of fine-grained SiC coating layer by fluidized bed-chemical vapor deposition method
- 论文作者：刘荣正 ; 刘马林 ; 常家兴 ; 王子梁 ; 邵友林 ; 刘兵 ; 王永欣
- 英文论文作者：LIU Rong-zheng ; LIU Ma-lin ; CHANG Jia-xing ; WANG Zi-liang ; SHAO You-lin ; LIU Bing ; WANG Yong-xin ; Institute of Nuclear and New Energy Technology ; Collaborative Innovation Center of Advanced Nuclear Energy Technology ; Tsinghua University ; Northwestern Polytechnical University
- 年：2015
- 作者机构：清华大学核能与新能源技术研究院先进核能技术协同创新中心;西北工业大学;
- 论文关键词：高温气冷堆 ; 流化床-化学气相沉积 ; SiC包覆层 ; 细晶
- 英文论文关键词：HTGR ; fluidized bed-hemical vapor deposition ; SiC ; fine grain
- 会议召开时间：2015-09-21
- 会议录名称：中国核科学技术进展报告（第四卷）——中国核学会2015年学术年会论文集第5册（核材料分卷、辐射防护分卷）
- 语种：中文
- 分类号：TL424
- 学会代码：EGVD
- 会议名称：中国核学会2015年学术年会
- 会议地点：中国四川绵阳
- 主办单位：中国核学会
- 学会名称：中国核学会
- 页数：5
- 文件大小：687k
- 原文格式：O
- 会议级别：全国
摘要
SiC包覆层是高温气冷堆核燃料元件TRISO包覆颗粒最关键的一层。制备细晶SiC包覆层对阻挡裂变产物释放、提高SiC包覆层承压能力等具有重要意义。本文通过流化床-化学气相沉积方法,在1 550℃条件下,在MTS裂解气体过程中引入脉冲丙烯气体,研究丙烯掺杂对SiC晶粒生长过程的影响。材料表征分析表明通过引入脉冲丙烯气体可以成功制备细晶SiC包覆层,实验研究给出了最佳的丙烯、氢气、氩气、MTS载带气配比,并结合晶体生长机理,给出了细晶制备的过程分析。
Silicon carbide is the key coating in TRISO particles,which are the main safety aspect in high temperature gas cooled reactor.SiC with fine grains shows great advantage to block harmful fission products and enhance the mechanical properties of the TRISO particles.In this study,pulse propylene was introduced to the fluidized bed-chemical vapor deposition system.Results showed SiC coating with fine grains was obtained by adding pulse propylene.The microstructures of the SiC coating layers with different propylene concentrations were investigated.Optimized experimental conditions were obtained by controlling the concentrations of propylene,H_2,Ar and MTS carrier gas.Possible formation mechanism of the fine grains was discussed.
Silicon carbide is the key coating in TRISO particles,which are the main safety aspect in high temperature gas cooled reactor.SiC with fine grains shows great advantage to block harmful fission products and enhance the mechanical properties of the TRISO particles.In this study,pulse propylene was introduced to the fluidized bed-chemical vapor deposition system.Results showed SiC coating with fine grains was obtained by adding pulse propylene.The microstructures of the SiC coating layers with different propylene concentrations were investigated.Optimized experimental conditions were obtained by controlling the concentrations of propylene,H_2,Ar and MTS carrier gas.Possible formation mechanism of the fine grains was discussed.
引文
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[6]Petti D A,Boungiorno J,Maki J T,et al.Key differences in the fabrication,irradiation and high temperature accident testing of US and German TRISO-coated particle fuel,and their implications on fuel performance.Nuclear Engineering and Design,2003,222:81-297.
[7]López-Honorato E,Fu K,Meadows P J,et al.Effect of microstructure on the resilience of silicon carbide to palladium attack.Journal of the American Ceramic Society,2010,93[12]:4135-4141.
[2]徐世江,程碧华,金磊.高温气冷堆燃料元件设计[J].核科学与工程,1993,13:37-43.
[3]Huschka H,and Vygen P.Coated fuel particles:requirements and status of fabrication technology.Nuclear technology,1977,35:238-245.
[4]Helary D,Bourrat X,Dugne O,et al.Microstructures of silicon carbide and pyrocarbon coatings for fuel particles for high temperature reactors.2~(nd)International Topical Meeting on HTR Technology in Beijing,2004.
[5]López-Honorato E,Tan J,Meadows P J,et al.TRISO coated fuel particles with enhanced SiC properties.Journal of Nuclear Materials,2009,392:219-224.
[6]Petti D A,Boungiorno J,Maki J T,et al.Key differences in the fabrication,irradiation and high temperature accident testing of US and German TRISO-coated particle fuel,and their implications on fuel performance.Nuclear Engineering and Design,2003,222:81-297.
[7]López-Honorato E,Fu K,Meadows P J,et al.Effect of microstructure on the resilience of silicon carbide to palladium attack.Journal of the American Ceramic Society,2010,93[12]:4135-4141.