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High temperature materials compatibility with liquid lithium lead Preliminary experimental study

Author: LingXinZhen
Tutor: HuangQunYing
School: University of Science and Technology of China
Course: Nuclear Energy Science and Engineering
Keywords: Liquid lithium -lead alloy SiC W Mo 310S stainless steel Compatibility
CLC: TB35
Type: Master's thesis
Year: 2011
Downloads: 114
Quote: 0
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Abstract


Fusion energy is a \However, the problem is to achieve fusion energy materials to application of the \SiC f / SiC composites, W, Mo due to its good physical properties, and become an important part of the high-temperature fusion reactor (such as cladding, divertor, etc.) promising candidate structural materials and functional materials. Meanwhile, FDS team based on liquid cladding related technology development needs, conducted a series of liquid lithium-lead circuit design and construction, in order to adapt to the development of high-temperature lithium lead circuit, urgent need to find a circuit suitable for high temperature piping material. 310S stainless steel because of its excellent high temperature oxidation resistance, high-temperature lithium lead it as a loop candidate structural materials. Since the high-temperature and high temperature materials are liquid lithium lead direct contact with the liquid lithium lead study their compatibility becomes critical. In this thesis, FDS team independently developed high-purity liquid lithium-lead alloy and high-temperature corrosion static lithium lead experimental device DRAGON-ST Series launched SiC ceramics and SiC f / SiC composites, W, Mo, and 310S stainless steel at 700 ℃ 1 000 ℃ liquid lithium lead times in different corrosion corrosion test. The results show that: 1) SiC and SiC f / SiC composites free Si, α-SiC, amorphous SiC at high temperatures easily dissolved in liquid lithium lead, resulting in phase with the high temperature liquid lithium lead Capacitive poor; 2) W, Mo at high temperature liquid lithium lead uniform corrosion occurs, in which W at 700 ℃ liquid lithium lead in samples after 500 hours corrosion corrosion depth 0.38mm · a -1 < / sup>, after 1000 hours corrosion test samples corrosion depth of 0.16mm · a -1 , the corrosion rate of growth slows down over time, probably mainly due to W in the solubility of lithium lead gradually saturated. Mo at 700 ℃ liquid lithium lead corrosion test after 500 hours in the corrosion depth of 1.96mm · a -1 , after 200 hours at 1000 ℃ corrosion test the corrosion depth 2.575mm · a -1 , with the higher the temperature, corrosion becomes more violent; 3) 310S stainless steel in high temperature liquid lithium lead more serious corrosion occurred at 700 ℃ 1 000 ℃ liquid lithium lead environment is difficult for a long time as a high temperature lithium lead test circuit structural materials.

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CLC: > Industrial Technology > General industrial technology > Materials science and engineering > High temperature materials, low temperature materials
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