4:45 PM - 5:00 PM
[2N15] Development of the Divertor Heat Removal Component with W and RAFM steel by the Advanced Brazing Technique
Keywords:the Advanced Brazing technique, tungsten, RAFM steel, divertor, heat transfer characteristic
The reliable bonding between tungsten (W) and reduced activation ferritic/martensitic (RAFM) steel (JLF-1) was obtained by the advanced brazing technique.
Minimize of the residual stress on the joint interface caused by mismatch of the coefficient of the thermal expansion (CTE) is mandatory to obtaining the reliable joint. A pure copper (Cu) interlayer was selected for the absorber of the residual stress, in which case BNi-6 (Ni-11%P) filler materials are inserted between W/Cu and Cu/JLF-1 interface. The stacked structure of the W/BNi-6/Cu/BNi-6/JLF-1 was subjected to the heat treatment procedure same as the advanced brazing technique. After the heat treatment procedures, a continuous heat transfer characteristic has been confirmed on the W/BNi-6/Cu/BNi-6/JLF-1 bonding structure through some physical and mechanical property testing.
Minimize of the residual stress on the joint interface caused by mismatch of the coefficient of the thermal expansion (CTE) is mandatory to obtaining the reliable joint. A pure copper (Cu) interlayer was selected for the absorber of the residual stress, in which case BNi-6 (Ni-11%P) filler materials are inserted between W/Cu and Cu/JLF-1 interface. The stacked structure of the W/BNi-6/Cu/BNi-6/JLF-1 was subjected to the heat treatment procedure same as the advanced brazing technique. After the heat treatment procedures, a continuous heat transfer characteristic has been confirmed on the W/BNi-6/Cu/BNi-6/JLF-1 bonding structure through some physical and mechanical property testing.