U-Nb合金具有良好的耐腐蚀性、结构稳定性和加工性,是核领域重要的结构材料.制备了不同Nb元素含量的淬火态U-Nb合金,对其显微组织和比热容进行了研究.结果表明:淬火态U-2Nb合金中存在大量粗针状马氏体;随着Nb元素含量的增加,马氏体逐渐消失,U-Nb合金形成等轴晶组织;随着Nb元素含量增加和温度的升高,U-Nb合金的比热容逐渐增大;当温度超过650℃时,U-Nb合金发生了相变,比热容显著减小.
U-Nb alloy had good corrosion resistance,structural stability and processability,it was an important structural material in the nuclear field.Quenched U-Nb alloys with different Nb element contents were prepared,and their microstructure and specific heat capacity were studied.The results show that there was a large amount of coarse needle like martensite in the quenched U-2Nb alloy.As the content of Nb element increased,martensite gradually disappearred,and U-Nb alloy formed equiaxed crystal structure.With the increase of Nb element content and temperature,the specific heat capacity of U-Nb alloy gradually increased.When the temperature exceeded 650℃,the U-Nb alloy underwent phase transformation and the specific heat capacity significantly decreased.
段丽美;袁自立;高瑞;杨振亮;李冰清;褚明福
中国工程物理研究院 材料研究所, 绵阳 621900
U-Nb合金;显微组织;比热容;相变;闪光法
U-Nb alloy;microscopic organization;specific heat capacity;phase transition;flash method
《理化检验-物理分册》 2024 (003)
1-3 / 3
国家自然科学基金项目(52174348,U20B2021,U22B20129);中国工程物理研究院军民融合基金项目(JMJJ202101)
10.11973/lhjy-wl202403001
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