The effect of the microstructure on the corrosion behavior of N5 superalloy in a molten (Li,Na,K)F eutectic salt
The effect of the microstructure on the corrosion behavior of N5 superalloy in a molten (Li,Na,K)F eutectic salt
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微观组织对N5高温合金在熔融(Li,Na,K)F共晶盐中腐蚀行为的影响
DOI：
10.1039/c5ra04755b
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发表时间：
2015-04
期刊：
影响因子：
3.9
通讯作者：
Zeng, Chao Liu
中科院分区：
文献类型：
--
作者：
Wang, Yan Li;Wang, Qian;Liu, Hui Jun;Zeng, Chao Liu
结构材料在熔融氟化物中的腐蚀受其微观结构的影响，是发展以氟化物为燃料载体或冷却剂的熔盐堆的一大挑战。研究了单晶和多晶N5高温合金在700 °C熔融（Li，Na，K）F共晶盐中的腐蚀行为。结果表明，在熔融（Li，Na，K）F中浸泡100 h后，多晶的质量损失远大于单晶。单晶和多晶N5高温合金的腐蚀主要是通过Cr和Al的优先溶解发生的，这导致Al/Cr贫化层和一些内部空洞。此外，多晶N5高温合金的腐蚀速率由于晶界的存在而明显加快，这导致约16.995 mg cm−2的质量损失和约175 μm的Al/Cr贫化层，而单晶N5高温合金的质量损失和Al/Cr贫化层分别为11.373 mg cm−2和125 μm。
The corrosion of structural materials in molten fluorides, influenced by the microstructure of the structural materials, is considered to be a great challenge for the development of molten salt reactors using fluorides as fuel carriers or coolants. In this paper, the corrosion behavior of the monocrystal and polycrystal N5 superalloy in molten (Li,Na,K)F eutectic salt at 700 °C is investigated. The results indicate that the mass loss of the polycrystal is much higher than that of the monocrystal after immersion in molten (Li,Na,K)F for 100 h. The corrosion of the monocrystal and the polycrystal N5 superalloys occurs mainly through the preferential dissolution of Cr and Al, which leads to an Al/Cr-depleted layer and some internal voids. Furthermore, the corrosion rate of the polycrystal N5 superalloy is obviously accelerated by the existence of grain boundaries, which results in a mass loss of about 16.995 mg cm−2 and a Al/Cr-depleted layer of around 175 μm, compared to 11.373 mg cm−2 and 125 μm, respectively, for the monocrystal N5 superalloy.
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影响因子：
1.6
作者：
M. Streicher
通讯作者：
M. Streicher
影响因子：
1.7
作者：
M. Kondo;T. Nagasaka;V. Tsisar;A. Sagara;T. Muroga;Takashi Watanabe;T. Oshima;Yukihiro Yokoyama
通讯作者：
M. Kondo;T. Nagasaka;V. Tsisar;A. Sagara;T. Muroga;Takashi Watanabe;T. Oshima;Yukihiro Yokoyama
影响因子：
1.2
作者：
MACPHERSON, HG
通讯作者：
MACPHERSON, HG
影响因子：
1.3
作者：
Olson, Luke;Sridharan, Kumar;Allen, Todd
通讯作者：
Allen, Todd
影响因子：
3.1
作者：
Kondo, Masatoshi;Nagasaka, Takuya;Terai, Takayuki
通讯作者：
Terai, Takayuki