Phase Composition and Thermal Stability of Rapidly Solidification U-V Alloys
Author of the article:ZHANG Pengguo;ZHANG Pei;KE Haibo;WU Min;HUANG Huogen
Author's Workplace：Institute of Materials,China Academy of Engineering Physics,Jiangyou 621907,China
Key Words：uranium alloy vanadium alloy amorphous phase non-equilibrium solidification
Abstract：
Uranium-vanadium(U-V)alloys have potential applications in nuclear industries.The phase composition and thermal stability of the alloy under rapidly solidification condition need to be further confirmed in order to fully understand its alloying characteristics.The U-V alloy with a series of components was designed near eutectic point U82V18,and the samples of rapidly solidification ribbons were prepared by single-roller technology.The phase composition and thermal stability of the U-V alloy were studied by XRD and DSC.The results show that the composition ofα-U solid solution,V solid solution and amorphous phase is formed under the condition of rapidly solidification(cooling rate up to 106K/s),and the amorphous phase is formed under the condition of equilibrium solidification.In addition to the amorphous crystallization process,other phase transition processes of these rapidly solidification alloys basically conform to the characteristics of equilibrium phase diagrams during the heating process.Compared with other alloys,the amorphous phase thermal stability of U82V18alloy is the best,which is determined by the eutectic composition characteristics.
