摘要
对乏燃料干法贮存运输容器用B4C/Al复合材料板进行了短期高温(480℃×48h)、长期高温(400℃,2 000,4 000,6 000,8 000h)老化试验以及在90℃,2 500mg·kg^(-1)硼酸溶液中的加速腐蚀试验,研究了该复合材料板的老化与腐蚀行为。结果表明:在480℃老化48h后,复合材料板表面局部颜色变暗,尺寸、密度、质量、力学性能无明显变化;在400℃长时间老化后,复合材料板表现出良好的尺寸稳定性和耐蚀性,力学性能的下降在正常波动范围内;在硼酸溶液中浸泡时,复合材料板矩形试样在浸泡4 000h以上时发生轻微局部腐蚀,而包覆试样随着浸泡时间的延长发生局部点蚀,浸泡8 000h时的点蚀较为明显。
Short-term high-temperature（480 ℃×48 h）and long-term high-temperature（400 ℃,2 000,4 000,6 000,8 000 h）aging tests and accelerated corrosion test at 90℃ in 2 500 mg·kg^（-1） boric acid solution were performed on B4 C/Al composite plates used in spent fuel dry storage and transport cask.The aging and corrosion behavior of the composite plates were studied.The results show that the color on local surface of the composite plate became grey and the dimensions,density,mass and mechanical properties changed little after aging at 480 ℃ for 48 h;after aging at 400℃ for a long term,the composite plates illustrated a good stability of dimensions and a high corrosion resistance,and the decrease of mechanical properties was within the normal range of fluctuation.After immersion in the boric acid solution for over 4 000 h,a slightly localized corrosion occurred on the rectangle samples of composite plate,while the pitting corrosion of the coated samples occurred with the elongation of immersion time and became relatively obvious after immersion for 8 000 h.
出处
《机械工程材料》
CSCD
北大核心
2017年第10期63-68,73,共7页
Materials For Mechanical Engineering
