采用真空非自耗电弧熔炼方法制备了4种不同Mo含量的Zr-0.4Fe-1.0Cr-xMo(x=0,0.2,0.4,0.6,质量分数,％)合金材料,研究了其在500℃,10.3 MPa过热水蒸汽中的耐腐蚀性能以及添加Mo对合金耐腐蚀性能的影响.结果表明,Zr-0.4Fe-1.0Cr-xMo合金中含有大量细小的第二相粒子,其腐蚀速率远远低于Zr-4,N18和M5合金.Mo的添加促进了氧化膜生长过程中的演变,降低了耐腐蚀性能.不含Mo合金的氧化膜生长动力学在整个腐蚀周期(2000 h)内一直保持近似立方规律,而含Mo合金的氧化膜生长动力学在500-1000 h内由近似立方规律向直线规律转变.
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