长期热老化对铝基碳化硼中子吸收材料性能的影响

摘要

Al/B4 C neutron absorber materials were subjected to elevated temperature testing at 400 ℃in an air at-mosphere for 8000 hours.The thickness, density, mechanical properties, B4C composition, boron-10 content, bo-ron-10 areal density and microstructure were studied .The results showed that after the long term elevated tempera-ture the coupons had no crack , pore, bubble.There was a slightly increase in tensile strength and elongation .There had no change of density, B4C composition, boron-10 content, boron-10 areal density and microstructure.%采用粉末冶金工艺制备的铝基碳化硼中子吸收板,经过400℃、8000 h长期加热处理后,观察了热老化处理后样品表面状态,测试了厚度、密度、力学性能、B4 C质量分数、10 B同位素含量、10 B面密度及微观组织,并与热老化处理前进行了对比,热老化处理后样品表面没有出现裂纹、气孔、鼓泡等现象,抗拉强度、延伸率略有增加,其他各项性能指标与热老化处理前几乎无变化.