煅烧温度对共沉淀法制备热障涂层用LaMgAl<sub>11</sub>O<sub>19</sub>前驱粉末性能的影响

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Abstract LaMgAl₁₁O₁₉ precursor powder for thermal barrier coating was prepared by co-precipitation method (precipitation temperature 80 ℃, precipitation pH value 10.5). The influence of calcining temperature on its microstructure, half-peak full width and spectral strength was tested and analyzed. The results showed that the powder has MgAl₂O₄, LaAlO₃ and La₂O₃ three phases after calcining at 1 100 ℃. As the calcining temperature rise to 1 500 ℃, the LaMgAl₁₁O₁₉ phase is abtained. The particle size of LaMgAl₁₁O₁₉ is between 3 and 5 μm and its thickness is 0.5 to 1.0 μm. When the calcination temperature continues to rise, the electron binding energy of Mg1s, O1s, La3d and Al2p fluctuates and shifts significantly towards the high-energy end. At 1 500 ℃, the electron binding energies of Mg, La and Al all increased. The main electron peaks of O1s, La3d, Mg2p and Al2p were formed on the XPS spectrogram, and Mg, La and Al were oxidized. LaMgAl₁₁O₁₉ crystal has formed a layered structure with interlaced structure, which is obviously anisotropic. As the calcination temperature rises to 1 300 ℃, the number of La₂O₃ bonds gradually decreases.

Key words： co-precipitation precursor powder LaMgAl₁₁O₁₉ microstructure spectrum is strong

Received: 20 May 2019 Published: 19 June 2020

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LIU Dongmei,LI Chao. Effect of temperature of coprecipitation on properties of LMA precursors for thermal barrier coatings[J]. Materials Science and Engineering of Powder Metallurgy, 2020, 25(1): 40-44.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2020/V25/I1/40

[1] 刘小鱼, 鲁飞, 刘树峰, 等. 镁基六铝酸镧陶瓷强化烧结和熔盐腐蚀行为[J]. 稀土, 2018, 39(3): 73-79.
LIU Xiaoyu, LU Fei, LIU Shufeng, et al.Enhanced sintering and fused salt corrosion behavior of lanthanum magnesium hexaaluminate ceramic[J]. Chinese Rare Earths, 2018, 39(3): 73-79.
[2] 吴红丹, 张锦化, 雷新荣, 等. 镁基六铝酸镧粉体的制备及高温原位XRD研究[J]. 稀有金属材料与工程, 2018, 47(S1): 59-62.
WU Hongdan, ZHANG Jinhua, LEI Xinrong, et al.Preparation of lanthanum magnesium hexaaluminate powders and in situ XRD study at high temperature[J]. Rare Metals Materials and Engineering, 2018, 47(S1): 59-62.
[3] 何明涛, 孟惠民, 王宇超, 等. 镁基六铝酸镧喷涂粉末制备及其热处理工艺研究[J]. 粉末冶金技术, 2018, 36(5): 370-376.
HE Mingtao, MENG Huimin, WANG Yuchao, et al.Preparation and heat treatment of lanthanum magnesium-based hexaaluminate sprayed powder[J]. Powder Metallurgy Technology, 2018, 36(5): 370-376.
[4] ZENG Jinyan, SUN Junbin, ZHANG Hao, et al.Lanthanum magnesium hexaluminate thermal barrier coatings with pre-implanted vertical microcracks: Thermal cycling lifetime and CMAS corrosion behaviour[J]. Ceramics International, 2018, 44(10): 102-111.
[5] CHEN Xiaolong, CAO Xueqiang, ZOU Binglin, et al.High- temperature corrosion behaviour of plasma sprayed lanthanum magnesium hexaluminate coating by vanadium oxide[J]. Journal of the European Ceramic Society, 2015, 35(1): 61-69.
[6] MIN Xin, FANG Minghao, HUANG Zhaohui, et al.Synthesis and luminescence properties of nitrided lanthanum magnesium hexaluminate LaMgAl₁₁O₁₉ phosphors[J]. Ceramics International, 2014, 40(3): 112-118.
[7] 李培忠, 谢敏, 赵鸣, 等. 镁基六铝酸镧热障涂层材料的制备及表征[J]. 稀土, 2010, 31(1): 26-29.
LI Peizhong, XIE Min, ZHAO Ming, et al.Preparation and characterization of mg-based lanthanum hexaaluminate thermal barrier coating materials[J]. Rare Earth, 2010, 31(1): 26-29.
[8] LIU Jian, SONG Qingsong, LI Dongzhen, et al.Crystal growth and spectroscopic characterization of Sm: LaMgAl₁₁O₁₉ crystal[J]. Journal of Luminescence, 2019, 215(32): 16-23.
[9] SUN Junbin, YU Hui, JIANG Jianing, et al.Crystallization mechanism of plasma-sprayed LaMgAl₁₁O₁₉ coating[J]. Applied Surface Science, 2019, 125(52): 64-72.
[10] 李莹, 陈小龙, 孙超, 等. 热障涂层陶瓷层材料LnMgAl₁₁O₁₉ (Ln=La,Nd)粉体的性能[J]. 材料研究学报, 2019, 33(6): 409-418.
LI Ying, CHEN Xiaolong, SUN Chao, et al.Preparation and performance of LnMgAl₁₁O₁₉(Ln=La,Nd) powders for thermal barrier coating[J]. Chinese Journal of Materials Research, 2019, 33(6): 409-418.
[11] HIRANO M, SHINYA K, SHINGO S.Mild hydrothermal formation and comparative coprecipitation route for EuTiNbO₆ fine phosphor[J]. Ceramics International, 2016, 42(7): 8240-8246.
[12] 何明涛, 孟惠民, 王宇超, 等. 镁基六铝酸镧喷涂粉末制备及其热处理工艺研究[J]. 粉末冶金技术, 2018, 36(5): 370-376.
HE Mingtao, MENG Huimin, WANG Yuchao, et al.Study on preparation and heat treatment process of LaMgAl₁₁O₁₉ spray powder[J]. Powder Metallurgy Technology, 2018, 36(5): 370-376.
[13] 陈利花, 梁小平. 纳米六角片状镁铝水滑石晶体的共沉淀法制备[J]. 徐州工程学院学报(自然科学版), 2012, 27(2): 30-33.
2012, 27(2): 30-33. CHEN Lihua, LIANG Xiaoping. Preparation of hexagonal nano-flake mg-al hydrotalcite crystals by co-precipitation 27(2): 30-33. CHEN Lihua, LIANG Xiaoping. Preparation of hexagonal nano-flake mg-al hydrotalcite crystals by co-precipitation[J]. Journal of Xuzhou Institute of Engineering (Natural Science Edition), 2012, 27(2): 30-33.
[14] 陈利花, 梁小平, 王荣涛. 共沉淀法制备六角片状镁铝水滑石纳米晶的研究[J]. 现代技术陶瓷, 2012, 33(2): 11-14.
CHEN Lihua, LIANG Xiaoping, WANG Ringtao.Preparation of hexagonal sheet mg-al hydrotalc nanocrystals by co-precipitation[J]. Modern technology ceramics, 2012, 33(2): 11-14.
[15] LU H R, WANG C A, ZHANG C G.Influence of Ln³+ and B³+ ions cosubstitution on thermo physical properties of LnMgB₁₁O₁₉-type magnetoplumbite LaMgAl₁₁O₁₉ for advanced thermal barrier coatings[J]. J Am Ceram Soc, 2013, 96(22): 1063-1071.