ZrC-SiC基体弥散包覆颗粒模拟核燃料芯块的SPS制备

Spark Plasma Sintering Preparation of Dispersion Coated Particle Surrogate Fuel Pellet with ZrC-SiC Matrix

摘要:

采用放电等离子烧结（SPS）工艺制备了ZrC-SiC复合基体弥散包覆颗粒燃料模拟芯块样品，研究了不同三重结构各向同性（TRISO）颗粒体积含量对烧结芯块样品微观形貌和烧结致密化过程的影响，并对芯块中TRISO颗粒分布情况进行了检测表征。结果表明：在1900 ℃/30 MPa/10 min烧结条件下，可以获得TRISO颗粒体积分数最高达到40%、颗粒分布均匀、微观结构完整、基体致密性较好的弥散包覆颗粒燃料芯块样品。当TRISO颗粒体积分数不高于40%时，颗粒体积分数对芯块样品的烧结致密化过程基本没有影响。

Abstract:

ZrC-SiC composite matrix dispersion coated particle fuel surrogate pellets were prepared by spark plasma sintering (SPS) process. The effects of different TRISO (TRistructural ISOtropic) packing fraction on the microstructure and sintering densification process of surrogate pellets were investigated, and the distribution of TRISO particles was characterized. The results show that under the sintering conditions of 1900 ℃/ 30 MPa/10 min, dispersion coated particle fuel pellet samples with TRISO packing volume fraction up to 40%, uniform particle distribution, integral microstructure and good matrix densification can be obtained. The TRISO packing fraction has little effect on the sintering densification process of fuel pellet samples.