Plasma Spray Deposition of Lanthanum Phosphate and Phase Structure of the Resultant Coatings
Plasma Spray Deposition of Lanthanum Phosphate and Phase Structure of the Resultant Coatings
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DOI：
10.1007/s11666-015-0320-5
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发表时间：
2015-10
影响因子：
3.1
通讯作者：
A. Pragatheeswaran;P. Ananthapadmanabhan;Y. Chakravarthy;Vandana Chaturvedi;S. Bhandari;K. Ramachandran
中科院分区：
文献类型：
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作者：
A. Pragatheeswaran;P. Ananthapadmanabhan;Y. Chakravarthy;Vandana Chaturvedi;S. Bhandari;K. Ramachandran
在16 ~ 24 kW的不同输入功率下，在不锈钢基体上制备了等离子喷涂磷酸镧涂层。涂层的特征在于通过X射线衍射，扫描电子显微镜，和傅立叶变换红外光谱。结果表明，涂层由磷酸镧（LaPO 4）、聚磷酸镧（La 2 P4 O 13）和磷酸氧镧（La 3 PO 7）组成。随后的涂层的热处理导致的La-聚磷酸盐和La-氧磷酸盐的重组，形成磷酸镧。涂层和涂层-基体界面微观结构的SEM图像显示微裂纹、空隙和孔隙率，发现这些微裂纹、空隙和孔隙率随着沉积功率而减小。
Plasma-sprayed lanthanum phosphate coatings were prepared on stainless steel substrates at different input powers from 16 to 24 kW. Coatings were characterized by x-ray diffraction, scanning electron microscopy, and Fourier transformed infrared spectroscopy. Results showed that the as-sprayed coatings consist of lanthanum ortho (LaPO4), poly(La2P4O13), and oxy(La3PO7) phosphates. Subsequent heat treatment of the coatings resulted in the recombination of the La-polyphosphate and La-oxyphosphate to form LaPO4. SEM images of microstructure of the coatings and coating-substrate interface showed micro-cracks, voids, and porosity that were found to decrease with deposition power.