铅铋合金环境中高强 AlCrFeNi 多主元合金的腐蚀行为

Traditional structure materials limit the higher performance of lead-bismuth nuclear system. In order to provide high-performance structural materials for lead-bismuth reactors, a study on static lead-bismuth eutectic compatability at high temperature for the high strength Al₁₇Cr₁₀Fe₃₇Ni₃₆ multi-principal-component alloy was carried out. The results showed that the alloy formed a dense Fe-Cr-Al-O oxide film and a loose iron oxide double-layer oxide film structure in the lead-bismuth saturated oxygen environment at 500~600℃. The double oxidation film is only 1.5μm, which shows that the growth velocity of double oxidation film is slowly. The study show the Fe –Cr –Al oxide film own excellent compactness and structure stability, which prevent the lead-bismuth corrode the matrix. This study shows that the advance of AlCrFeNi multi-principal-component alloys in the lead-bismuth system, compared with the traditional ferrite/martensite stainless steel and austenite stainless steel.