Wear tests of materials for FBR in sodium environment(I); Wear of hard metals

Kano, Shigeki; Mizobuchi, Shotaro*; Namekawa, Masaru; not registered; Atsumo, Hideo; Owada, Tetsuro*

In views of the limitation of use and the durability, it is necessary to use wear resistant materials for sliding components of sodium cooled reactors. Therefore, it is required that we obtain wear data about these materials in high temperature sodium. We conducted wear tests about various pairs of hard metals (stellite No.1, stellite No.6, colmonoy No.5 and colmonoy No.6). The tests yielded the following results: (1)The specific wear rate was less and the friction coefficient was lower and more stable in the test about a pair of hard metals (Colmonoy No.5 & No.6) than about both pairs of SUS304 coupled with stellite No.1 and Colmonoy No.6. (2)The friction coefficient was lower in the test about the pair of SUS304 coupled with stellite No.1 than coupled with colmonoy No.6. (3)The friction-affected Layer was found on the sliding surface. (4)The appearance of the sliding surface was considerably different between in sodium and in argon.