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Report No.
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Self-Welding Behavior of Various Materials in a Sodium Environment (V); Frictional Behavior of the Candidate Materials for Duct Paid in the Various Environment

Mizobuchi, Shotaro*; Kano, Shigeki; Nakayama, Koichi; Namekawa, Masaru; Atsumo, Hideo

We have been conducting a series of self-welding and friction tests for the material selection of the contacting and sliding parts used in a fast breeder reactor. In the present study, we tested some candidate materials for duct pads of the fuel-assembly in high temperature sodium and argon, and made the evaluation of these materials. The following results were obtained: (1) tellite No.6 showed the stablefrictional behavior in 280$$^{circ}C$$ sodium, but incresed the frictional coefficient and flushing effect in 540$$^{circ}C$$ sodium. (2) Colmonoy No.6 showed the stable frictional coefficient 0f 0.3$$sim$$0.4 under a heavy load (500 kg) or in high temperature sodium. (3) Chromecarbide materials showed the different frictional behavior according to the methods for finishing of the test surface. Frictional coefficient of the grinder-finish-ed chrome-carbide exceeded q.o, and indicated a greater flushing effect in 540$$^{circ}C$$ sodium. (4) hard chrome plating showed an unstable frictional behavior, the fric

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