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首页> 外文会议>Ceramic materials for energy applications II >PROCESSING OF INERT SIC MATRIX WITH TRISO COATED FUEL BY LIQUID PHASE SINTERING
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PROCESSING OF INERT SIC MATRIX WITH TRISO COATED FUEL BY LIQUID PHASE SINTERING

机译：液相烧结法制备TRIS涂层燃料惰性SiC基体

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摘要

SiC is a promising material for nuclear applications especially due to its outstanding properties of excellent high temperature strength, high thermal conductivity and exceptional low-activation against neutron irradiation. It is proposed to replace the current uranium oxide fuel pellets for light water reactors with the ceramic micro-encapsulated uranium compacted within SiC inert matrix. In this study, nanostructured SiC fabricated by liquid phase sintering of SiC nanopowder was proposed as a dense inert SiC matrix for compact-packing of surrogate TRISO fuel particles. Sintering additives like Y_2O_3 and Al_2O_3 were used in addition to SiC nanopowder in the amount of 6 wt%. The powder mixture without the fuel particles was sintered by hot-pressing at 1750-1900 ℃ under 10 MPa to investigate the influences of sintering temperature on density and compression strength in inert SiC matrix itself. Based on the condition for densfied SiC matrix formation without the fuel particles under as a low sintering temperature as possible, pellets including 40 vol% TRISO particles were sintered at hot-pressing and characterized by microstructural observation and evaluation of thermal conductivity.
机译：SiC是核应用的有前途的材料，特别是由于其出色的性能，包括出色的高温强度，高导热性和出色的抗中子辐射低活化性。建议用压实在SiC惰性基体中的陶瓷微囊化铀代替目前用于轻水反应堆的氧化铀燃料芯块。在这项研究中，提出了通过液相烧结SiC纳米粉制备的纳米结构SiC作为致密惰性SiC基质，用于紧凑包装TRISO燃料颗粒。除了SiC纳米粉之外，还以6重量％的量使用了烧结添加剂，例如Y_2O_3和Al_2O_3。通过在1750-1900℃，10 MPa下热压烧结无燃料颗粒的粉末混合物，研究了烧结温度对惰性SiC基体本身的密度和抗压强度的影响。根据在尽可能低的烧结温度下没有燃料颗粒的致密SiC基体形成条件，在热压条件下烧结含40％（体积）TRISO颗粒的颗粒，并通过显微组织观察和热导率评估进行表征。

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  • 会议地点 Daytona Beach FL(US);Daytona Beach FL(US);Daytona Beach FL(US);Daytona Beach FL(US);Daytona Beach FL(US);Daytona Beach FL(US)
  • 作者

    Kazuya Shimoda; Tatsuya Hinoki; Kurt A Terrani; Lance L Snead; Yutai Katoh;

  • 作者单位

    Institute of Advanced Energy, Kyoto University, Gokasho Uji, Kyoto 611-0011, Japan;

    Institute of Advanced Energy, Kyoto University, Gokasho Uji, Kyoto 611-0011, Japan;

    Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, TN 37831-6138, USA;

    Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, TN 37831-6138, USA;

    Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, TN 37831-6138, USA;

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