1 School of Material Science and Engineering, Chang'an University, Xi'an 710064, China 2 Postdoctoral Scientific Research Station of Mechanical Engineering, Chang'an University, Xi'an 710064, China 3 Technical Center, Jinduicheng Molybdenum Co., Ltd., Xi'an 710077, China
Abstract: The Si-B composite coatings with different doping amount of CeO2 were prepared on the surface of molybdenum substrate by two-step pack cementation methods. The effect of CeO2 doping on phase structure and cross-section morphology of Si-B composite coatings before and after oxidation at 1 150℃ were analyzed by XRD, EDS and SEM. The oxidation kinetics of Si-B composite coatings before and after CeO2 doping oxidized at 1 150℃ for 160 h were studied by mass-loss method. The results showed that appropriate doping amount of CeO2 had certain per-meation effect on Si element in pack cementation process. The Si-B composite coatings with thick, uniform and dense structure were obtained when the doping amount of CeO2 was fixed at 1wt%. However, the thickness of Si-B composite coatings decreased with the further increase of CeO2 doping amount. The oxidation rate constant (1.48×10-4 mg2/(cm4·h))of the doped Si-B composite coating oxidized at 1 150℃ for 70 h was significantly lower than that without CeO2 doping, which indicated that the Si-B composite coating doped with CeO2 has better high temperature oxidation resistance.
1 Xing K Y, Wang X, Li Z X, et al. Materials Protection, 2018, 51(12), 111(in Chinese). 邢开源, 汪欣, 李争显, 等. 材料保护, 2018, 51(12), 111. 2 Modec B, Košmrlj J. Inorganica Chimica Acta, 2019, 486, 766. 3 Niu F, Wang Y, Abbas I, et al. Ceramics International, 2017, 43(3), 3238. 4 Zhang Y, Wang X Y, Yu J, et al. Materials Reports A: Review Papers, 2017, 31(3), 83(in Chinese). 张勇, 王雄禹, 于静, 等. 材料导报:综述篇, 2017, 31(3), 83. 5 Yang K M, Wang J X, Yang S Y, et al. Surface and Coatings Technology, 2018, 354, 324. 6 Sun J, Li T, Zhang G P. Corrosion Science, 2019, 155, 146. 7 Riedl H, Vieweg A, Limbeck A, et al. Surface & Coatings Technology, 2015, 280, 282. 8 Sun R, Wang K S, Hu P,et al. Materials Reports A: Review Papers, 2016, 30(3),69(in Chinese). 宋瑞, 王快社, 胡平, 等. 材料导报:综述篇, 2016, 30(3),69. 9 Jiang J, Zhou T, Shao W, et al. Journal of Alloys and Compounds, 2019, 786, 920. 10 Sahu J N, Sasikumar C. Journal of Materials Processing Technology, 2019, 263, 285. 11 Jonnalagadda K P, Eriksson R, Li X H, et al. Journal of the European Ceramic Society, 2019, 39(5),1869. 12 Boissonnet G, Bonnet G, Pasquet A, et al. Journal of the European Ceramic Society, 2019. 39(6), 2111. 13 Sun J, Fu Q G, Guo L P, et al. Materials & Design, 2016, 92, 602. 14 Zhang P, Guo X, Zhang C, et al. International Journal of Refractory Metals & Hard Materials, 2017, 67, 32. 15 Dai L, Yu Y, Zhou H, et al. Ceramics International, 2015, 41(10), 13663. 16 Xiao L R, Zhang B, Cai Z Y, et al. Rare Metal Materials and Enginee-ring, 2018, 47(11), 141(in Chinese). 肖来荣, 张贝, 蔡圳阳, 等. 稀有金属材料与工程, 2018, 47(11), 141. 17 Kuznetsov S A, Rebrov E V, Mies M J M, et al. Surface and Coatings Technology, 2006, 201(3-4), 971. 18 Lange A, Heilmaier M, Sossamann T A, et al. Surface & Coatings Technology, 2015, 266, 57. 19 Wang Y, Yan J, Wang D. International Journal of Refractory Metals & Hard Materials, 2017, 68,60. 20 Tian X, Guo X, Sun Z, et al. Journal of Rare Earths, 2016, 34(9),952. 21 Ning F, Zhang Y, Wang X Y, et al. Hot Working Technology, 2019, 48(4), 141(in Chinese). 宁璠, 张勇, 王雄禹, 等. 热加工工艺, 2019, 48(4), 141. 22 Castano C E, O'Keefe M J, Fahrenholtz W G. Current Opinion in Solid State and Materials Science, 2015, 19(2),69. 23 Wang X Y, Zhang Y, Zhi L, et al. Hot Working Technology, 2018, 47(6),161(in Chinese). 王雄禹, 张勇, 支龙, 等. 热加工工艺, 2018, 47(6),161. 24 Zhu L C, Tang G B, Shi Q, et al. Chinese Journal of Applied Chemistry, 2005, 22(7), 715(in Chinese). 朱连超, 唐功本, 石强, 等. 应用化学, 2005, 22(7), 715. 25 Wang Y, Wang D Z, Yan J H. Journal of Alloys and Compounds, 2014, 589(9), 384. 26 Wang Y. Preparation and properties of Mo-based alloys oxidation resis-tance coatings at elevated temperature.Ph.D. Thesis, Central South University, China, 2014(in Chinese). 汪异. 钼基合金高温抗氧化涂层的制备及其性能研究. 博士学位论文, 中南大学, 2014. 27 Ouyang G Y, Ray P K, Thimmaiah S. Applied Surface Science, 2019, 470, 289. 28 Alam M Z, Venkataraman B, Sarma B, et al. Journal of Alloys and Compounds, 2009, 487(1-2), 335. 29 Yoon J, Kim G, Byun J, et al. Surface & Coatings Technology, 2001, 148(2), 129. 30 Li M S. High temperature corrosion of metals, Metallurgical Industry Press, China, 2001(in Chinese). 李美栓. 金属的高温腐蚀, 冶金工业出版社, 2001.