Synthesis and Properties of Self-sensitization Luminescent Composite Coatings

doi:10.15541/jim20160243

Abstract

Abstract:

It is very important for coating to detect integrity and working life in corrosive environment. The self-sensitization luminescent coating were fabricated by electroplating technique from a modified Watts bath combined with blue-emitting (BaMgAl₁₁O₁₇: Eu²⁺), red-emitting (Y₂O₃: Eu³⁺), and green-emtting (CeMgAl₁₁O₁₉: Tb³⁺) rare-earth fluorescent particles. The surface morphology, microstructure, wettability, deposition rate, hardness, and self-sensitization luminescent property of the obtained composite coatings were characterized by using fluorescence spectrophotometer, surface profile measuring instrument, vickers, scanning electronmicroscope (SEM), X-ray diffraction (XRD), and electrochemical test techniques. The results show that surfactants of non-ionic PEG (polyethylene glycol) and cationic CTAB (cetyltrimethylammonium bromide) effectively improve the particles deposition rate. The fluorescent particles shows different wettability and matching with nickel, which have different effects on microstructure of the composite coatings. Y₂O₃: Eu³⁺fluorescent particles change the coating crystal orientation and grain refinement, BaMgAl₁₁O₁₇: Eu²⁺ fluorescent particles make the coating morphology presents knot. The coating hardness is increased obviously in composite coatings containing Y₂O₃: Eu³⁺ and CeMgAl₁₁O₁₉: Tb³⁺ particles. The fluorescent particles show different luminescent characteristics after corrosion, indicating good self-sensitization and effective monitor on the integrity of the composite coatings.

Key words: fluorescent particles, electrodeposition, self-sensitization monitor, Ni-base composite coatings

CLC Number:

TQ153

HE Ling, LI Qian-Kun, LI Weng-Sheng, CUI Shuai. Synthesis and Properties of Self-sensitization Luminescent Composite Coatings[J]. Journal of Inorganic Materials, 2017, 32(1): 56-62.

Figures/Tables 11

Table1 Chemical composition of the electrodeposition bath

Composition	NiSO₄·6H₂O	NiCl₂·6H₂O	H₃BO₃	Saccharin	1, 4-butynediolcoumarin	Coumarin	CTAB	PEG
Concentration/ (g·L^-1)	250	45	40	1	0.3	0.1	0.1/0.2	0.04

Fig. 1 Deposition rate of fluorescence particles on the composite coatings in the plating bath with different concentrations

Fig. 2 Effect of surfactant (CTAB) concentration on deposition rate of fluorescence particles

Fig. 3 Curves of linear sweep voltammetry of different composite coatings

Fig. 4 Surface morphologies of composite coatings(a) Ni-BaMgAl11O17: Eu2+; (b) Ni-CeMgAl11O19: Tb3+; (c) Ni-Y2O3: Eu3+

Fig. 5 Cross-sectional optical micrographs of composite coatings(a) Ni-BaMgAl11O17: Eu2+; (b) Ni-CeMgAl11O19: Tb3+; (c) Ni-Y2O3: Eu3+

Fig. 6 XRD patterns of composite coatings

Fig. 7 Effect of concentration of fluorescence particles on the hardness of coatings

Table 2 Properties of the coatings studied

Coating	Grain size/nm	Microhardness, HV	Roughness parameters, R_a /µm	Roughness parameters, R_max/µm
Ni-BaMgAl₁₁O₁₇: Eu²⁺	23.5	530	1.389	7.50
Ni-CeMgAl₁₁O₁₉: Tb³⁺	17.1	745	0.847	3.96
Ni-Y₂O₃: Eu³⁺	11.1	756	1.296	7.60

Fig. 8 Emission spectra of composite coatings(a) Ni-BaMgAl11O17: Eu2+; (b) Ni-CeMgAl11O19: Tb3+; (c) Ni-Y2O3: Eu3+

Fig. 9 Emission spectra of composite coatings before and after corrode in the 3.5wt% NaCl solution(a) Ni-BaMgAl11O17: Eu2+; (b) Ni-CeMgAl11O19: Tb3+; (c) Ni-Y2O3: Eu3+

References 19

[1]	GUTSEV D, ANTONOV M, HUSSAINOVA I,et al. Effect of SiO2 and PTFE additives on dry sliding of NiP electroless coating.Tribology International, 2013, 65(3): 295-302.
[2]	BAKHIT B, AKBARI A, NASIRPOURI F,et al.Corrosion resistance of Ni-Co alloy and Ni-Co/SiC nanocompositecoatings electrodeposited by sediment codeposition technique.Applied Surface Science, 2014, 307(1): 351-359.
[3]	ISLAM M, AZHAR M R, FREDJ N,et al.Electrochemical impedance spectroscopy and indentation studies of pure and composite electroless Ni-P coatings.Surface and Coatings Technology, 2013, 236(24): 262-268.
[4]	HOUA K H, WANG H T, SHEU H H,et al.Preparation and wear resistance of electrodeposited Ni-W/diamond composite coatings.Applied Surface Science, 2014, 308(1/2): 372-379.
[5]	FELDSTEIN M D.Composite coatings with light-emitting properties.Metal Finish, 1999, 97(2): 87-90.
[6]	ELDRIDGE J.Erosion-indicating thermal barrier coatings using luminescent sublayers.The American Ceramic Society, 2006, 89(10): 3252-3254.
[7]	GANAPATHI M, ELISEEVA S V, BROOKS N R,et al.Electrodeposition of luminescent composite metal coatings containing rare earth phosphor particles.J. Mater. Chemistry, 2012, 22(12): 5514-5522.
[8]	HE Y, WANG S C, WALSH F C,et al. The monitoring of coating health by in-situ luminescent layers.RSC Advance, 2015, 5(53): 42965-42970.
[9]	LI QIANG, GAO LIAN, YAN DONG-SHENG, Luminescent charaeterization of nano-Y2O3: Eu3+.Journal of Inorganic Materials, 1997, 12(2): 237-241.
[10]	LIN YING-LIANG, ZHOU GUANG-MEI, FENG DE-XIONG.Preparation of the phoshor BaMgAl11O17: Eu2+ by the surface diffusion method.Journal of Inorganic Materials, 1999, 14(3): 425-430.
[11]	LI JING-SHENG, SUN XUN-DONG, LI XIAO-DONG,et al.(Y, Lu)A G: Ce phosphors synthesized by stearate melting method and theirfluorescence properties.Journal of Inorganic Materials, 2015, 30(2): 177-182.
[12]	LI QIANG, GAO LIAN, YAN DONG-SHENG.Recent advance in nanoscale luminescent materials of rare earth compounds.Journal of Inorganic Materials, 2001, 16(1): 17-22.
[13]	KILIC F, GULB H, ASLAN S, et al. Effect of CTAB concentration in the electrolyte on the tribological properties of nanoparticle SiC reinforced Ni metal matrix composite (MMC) coatings produced by electrodeposition.Colloids and Surfaces A: Physicochem. Eng. Aspects, 2013, 419(419): 53-60.
[14]	QU N S, ZHU D, CHAN K C, et al. Fabrication of Ni-CeO2 nanocomposite by electrodeposition. Scripta.Materialia, 2006, 54(7): 1421-1425.
[15]	PENG X, LI T., WU W, et al.Effect of La2O3 particles on the oxidation of electrodeposited nickel films.Oxidition Metals, 1999, 51(3/4): 291-315.
[16]	PENG X, LI T, WU W, et al.Mater.Effect of La2O3 particles on microstructure and cracking-resistance of NiO scale on electrodeposited nickel films.Science Engineering, 2001, 298(1): 100-109.
[17]	ZHOU Y B, SUN J F, WANG S C, et al.Oxidation of an electrodeposited Ni-Y2O3 composite film.Corrosion Science, 2012, 63(10): 351-357.
[18]	SHAKOOR R A, KAHRAMAN R, WAWARE U S,et al. Synthesis and properties of electrodeposited Ni-B-CeO2 composite coatings.Materials and Design, 2014, 59(59): 421-429.
[19]	ZHOU XIAO WEI, SHENG YI PU.Corrosion behavior and EIS study of nanocrystalline Ni-CeO2 coatings in an acid NaCl solution.Acta Metallurgica Sinica, 2013, 49(9): 1121-1130.