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| Microstructure and thermal shock resistance of Nb/Y2O3 coating prepared by slurry sintering |
| LIN Shiqi, YUAN Tiechui, WANG Fei |
| State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China |
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Abstract For the reuse of crucibles used to smelt nuclear metals and the recovery of spent fuel, a series of double-layer gradient composite Yttria-coatings were prepared on the surface of Niobium 521 alloy by slurry sintering process. Trace amounts of Si and Mo were added as reinforcing agents in the coating, the surface of the coating was pure Y2O3. With the help of finite element simulation, X-ray diffractometer, scanning electron microscopy, energy spectrometer and other means, the microstructure and thermal shock resistance of the coating were studied. The results show that the Nb/Y2O3 coating has a typical layered structure, which is composed of irregular powder particles stacked on top of each other, and the matrix area, diffusion area, transition layer and Y2O3 layer have distinct structures. The finite element simulation calculation and experimental results both prove that the double-layer gradient coating can change the stress distribution and effectively reduce the stress generated inside the material during thermal shock. Among them, the maximum principal stress of the 70%Y2O3+22% Nb+6%Si+2%Mo (7022) coating is 163.2 MPa, which decreases by 47.93% compared to the single-layer Y2O3 coating (313.4 MPa). After 60 thermal cycles, the microstructure of the 7022-Y2O3 coating is dense without obvious defects, and the morphology is the least damaged.
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Received: 09 March 2023
Published: 06 July 2023
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[1] BELL M Z, MACFARLANE A.“Fixing” the nuclear waste problem? The new political economy of spent fuel management in the United States[J]. Energy Research and Social Science, 2022, 91: 102728.
[2] FUKAYA Y, GOTO M, HIROFUMI OHASHI A.Feasibility study on reprocessing of HTGR spent fuel by existing PUREX plant and technology[J]. Annals of Nuclear Energy, 2023, 181: 109534.
[3] 黄洁丝. 论我国核燃料循环技术发展战略[J]. 现代商贸工业, 2022, 43(16): 232-236.
HUANG Jiesi.On the development strategy of nuclear fuel cycle technology in China[J]. Modern Commerce and Trade Industry, 2022, 43(16): 232-236.
[4] HANIA P R, BOOMSTRA D A, BENES O, et al.Irradiation of thorium-bearing molten fluoride salt in graphite crucibles[J]. Nuclear Engineering and Design, 2021, 375: 111094.
[5] 张陆, 章德铭, 鲍君峰. 金属陶瓷涂层摩擦磨损的性能研究[J]. 电子技术, 2020, 49(3): 176-183.
ZHANG Lu, ZHANG Deming, BAO Junfeng.Study on friction and wear properties of cermet coatings[J]. Electronic Technology, 2020, 49(3): 176-183.
[6] 陈颢, 熊伟, 王永欣, 等. 等离子喷涂Al2O3-TiO2陶瓷涂层的显微组织及摩擦学性能[J]. 粉末冶金材料科学与工程, 2016, 21(3): 434-443.
CHEN Hao, XIONG Wei, WANG Yongxin, et al.Microstructure and tribological properties of plasma sprayed Al2O3-TiO2 ceramic coating[J]. Materials Science and Engineering of Powder Metallurgy, 2016, 21(3): 434-443.
[7] 范衍, 范景莲, 李威, 等. 料浆涂覆法制备W-Si-ZrO2- Y2O3高温抗氧化涂层的组织与高温氧化行为[J]. 粉末冶金材料科学与工程, 2016, 21(5): 754-759.
FAN Yan, FAN Jinglian, LI Wei, et al.Microstructure and high-temperature oxidation behavior of W-Si-ZrO2-Y2O3 high-temperature anti-oxidation coating prepared by slurry coating[J]. Materials Science and Engineering of Powder Metallurgy, 2016, 21(5): 754-759.
[8] ALANGI N, MUKHERJEE J, ANUPAMA P, et al.Liquid uranium corrosion studies of protective yttria coatings on tantalum substrate[J]. Journal of Nuclear Materials, 2011, 410(1): 39-45.
[9] PADMANABHAN P V A, RAMANATHAN S, SREEKUMAR K P, et al. Synthesis of thermal spray grade yttrium oxide powder and its application for plasma spray deposition[J]. Materials Chemistry and Physics, 2007, 106(2): 416-421.
[10] SHARMA S K, SAIFY M T, MAJUMDAR S, et al.Interaction study of molten uranium with multilayer SiC/Y2O3 and Mo/Y2O3 coated graphite[J]. Nuclear Engineering and Technology, 2022, 55(5): 1855-1862.
[11] MANJULA G, RANI ROY B, JYOTHSNA S, et al.Comparative study of the absorption coefficient of Nb metal and its compound[J]. Materials Today: Proceedings, 2021, 43: 2411-2421.
[12] 张霞, 张晶, 柳岩, 等. 铌合金表面热防护涂层研究进展[J]. 装备环境工程, 2020, 17(11): 125-131.
ZHANG Xia, ZHANG Jing, LIU Yan, et al.Research progress on thermal protective coatings on niobium alloy surface[J]. Equipment Environmental Engineering, 2020, 17(11): 125-131.
[13] 孙佳, 王玉, 付前刚. 铌合金高温热防护及其抗氧化硅化物涂层[J]. 中国材料进展, 2018, 37(10): 817-825.
SUN Jia, WANG Yu, FU Qiangang.High temperature thermal protection of niobium alloy and its anti-oxidation silicide coating[J]. China Materials Progress, 2018, 37(10): 817-825.
[14] LIU H, CHEN X, JIANG R, et al.Microstructure and mechanical properties of three-dimensional oxide/oxide composite fabricated by a slurry infiltration and sintering process[J]. Journal of the European Ceramic Society, 2023, 43(2): 493-500.
[15] LI L, GUO X, QIAO Y.Formation and oxidation resistance of MoSi2 coating for Nb-Si based alloy prepared by slurry sintering method[J]. Journal of Alloys and Compounds, 2023, 938: 168456.
[16] XIAO K, XUE W, LI Z, et al.Effect of sintering temperature on the microstructure and performance of a ceramic coating obtained by the slurry method[J]. Ceramics International, 2018, 44(10): 11180-11186.
[17] DEREVSCHIKOV V S, PROKHOROV D I, BAZAIKIN Y V, et al.Phenomenology and modeling of Y2O3 porous grain sintering[J]. Ceramics International, 2023, 49(6): 9452-9464.
[18] CHENG T, WANG Z, DAI S, et al.Fabrication of ceramic sealing coatings for shell bionic structures and their failure mechanism during thermal cycling[J]. Ceramics International, 2023, 49(6): 8962-8975.
[19] SHU J, DONG Z, ZHENG C, et al.High-throughput experiment-assisted study of the alloying effects on oxidation of Nb-based alloys[J]. Corrosion Science, 2022, 204:110383.
[20] CHEN D, WANG Q, LIU Y, et al.Microstructure, thermal characteristics, and thermal cycling behavior of the ternary rare earth oxides (La2O3, Gd2O3, and Yb2O3) co-doped YSZ coatings[J]. Surface and Coatings Technology, 2020, 403: 126387. |
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2023, Vol. 28 
