载荷对HTR-PM高温气冷堆用石墨球摩损性能的影响  

Effect of loads on wear performance of graphite pebbles used in HTR-PM high temperature gas cooled reactor

作　　者：邓少刚[1] 郭丽潇[1] 梁宇[1] 张宇航 梁栋[1] 王永仙[1] DENG Shaogang;GUO Lixiao;LIANG Yu;ZHANG Yuhang;LIANG Dong;WANG Yongxian(China Institute for Radiation Protection,Taiyuan 030006)

机构地区：[1]中国辐射防护研究院

出　　处：《辐射防护》2019年第6期510-516,共7页Radiation Protection

基　　金：华能集团科技项目(项目编号:HNKJ-H18)

摘　　要：采用摩擦磨损试验机研究了载荷对HTR-PM高温气冷堆用石墨球在氦气气氛下的摩损性能影响,并利用光学显微镜分析了磨损表面形貌,利用激光粒度仪和扫描电镜分析了石墨粉尘的粒度和形貌。结果表明:在氦气气氛下,摩擦系数随着载荷的增加呈现减小的趋势;产生的石墨粉尘主要呈片状或絮状体,有较强的粘附性,粒度随着载荷的增加而增加;不同载荷下,随着时间的增加,石墨球的磨损率不断减小,最终趋于一个稳定值。Wear performance of graphite pebbles used in the HTR-PM high temperature gas cooled reactor at different loads in helium were investigated with a friction and wear tester.Surface and appearance of graphite pebbles were analyzed using a optical microscope.Particle size and pattern of graphite dust were studied using a scanning electron microscope and laser particle analyzer.Results show that in helium atmosphere,the friction coefficient decreases as the load increases.The graphite dust is mainly flaky or flocculent,and has strong adhesiveness.Particle size of the graphite dust increases as the load increases.At different loads,the wear rate of graphite pebbles decreases continuously and eventually goes to a steady value.

关 键 词：高温气冷堆 载荷 石墨球 摩损性能 

分 类 号：TL342[核科学技术—核技术及应用]