Methyl hydrogen silicone converted SiO2 bonded composite coatings with high infrared emissivity additives of Cr2O3 and Al2O3 were prepared on Ti–6Al–2Zr–1Mo–1V titanium alloy by a dipping and then pyrolysing process. The phase composition and microstructure of the coating were characterised by X-ray diffraction and scanning electron microscopy. The results show that after exposing the samples to an oxidative atmosphere at 600°C for 100 h, the coated samples pyrolysed at 600 and 800°C exhibit a significantly lower weight gain (0·11 mg cm−2) compared with that of the titanium substrate (0·54 mg cm−2). The weight gain for both coated samples oxidised at 800°C increases up to 1·4 mg cm−2, while the titanium substrate damages by oxide scale peeling. The coating pyrolysed at 800°C has a high infrared emissivity value of above 0·85, which is slightly higher than that of the coating pyrolysed at 600°C.
SunZ. C., YangH., HanX. G. and FanX. G.:‘A numerical model based on internal-state-variable method for the microstructure evolution during hot-working process of TA15 titanium alloy’, Mater. Sci. Eng. A., 2010, A5273464–3471.
2.
ZhaoY., GuoH. Z., ShiZ. F., YaoZ. K. and ZhangY. Q.:‘Microstructure evolution of TA15 titanium alloy subjected to equal channel angular pressing and subsequent annealing at various temperatures’, J. Mater. Proc. Technol., 2011, 211, 1364–1371.
3.
ShanD. B., YangG. P. and XuW. C.:‘Deformation history and the resultant microstructure and texture in backward tube spinning of Ti–6Al–2Zr–1Mo–1V’, J. Mater. Proc. Technol., 2009, 209, 5713–5719.
4.
OmidbakhshF., EbrahimiA. R. and SojkaJ.:‘High temperature oxidation effects on surface roughness of Ti–4Al–2V’, Surf. Eng., 2013, 29, 322–327.
5.
LeyensC., van LiereJ.-W., PetersM. and KaysserW. A.:‘Magnetron-sputtered Ti–Cr–Al coatings for oxidation protection of titanium alloys’, Surf. Coat. Technol., 1998, 108, 30–35.
6.
WangW. M., YangB., DuL. Z. and ZhangW. G.:‘Diffusion research between Ni3Al coating and titanium alloy produced by plasma spraying process’, Appl. Surf. Sci., 2010, 256, 3342–3345.
7.
LiC. G., WangY., GuoL. X., HeJ. Q., PanZ. Y. and WangL.:‘Laser remelting of plasma-sprayed conventional and nanostructured Al2O3–13wt.%TiO2 coatings on titanium alloy’, J. Alloys Compd, 2010, 506, 356–363.
8.
LeeD. B., HabazakiH., KawashimaA. and HashimotoK.:‘High temperature oxidation of a Nb–Al–Si coating sputter-deposited on titanium’, Corros. Sci., 2000, 42, 721–729.
9.
MoskalewiczT., SmeacettoF., CempuraG., AjitdossL. C., SalvoM. and Czyrska-FilemonowiczA.:‘Microstructure and properties characterisation of the double layered glass–ceramic coating on near-α titanium alloy’, Surf. Coat. Technol., 2010, 204, 3509–3516.
10.
ChenG. Q., LiN. N., FuX. S. and ZhouW. L.:‘Preparation and characterization of a sodium polyacrylate/sodium silicate binder used in oxidation resistant coating for titanium alloy at high temperature’, Part. Technol., 2012, 230, 134–138.
11.
RoyS., MaharanaR., Gokul LaxmiS., SakthivelY., RoyM., Bhanu PrasadV. V. and DasD. K.:‘AlPO4–C composite coating for high emissivityand oxidation protection applications’, Surf. Eng., 2013, 29, 360–365.
12.
YaoZ. P., JiangZ. H., WangF. P. and HaoG. D.:‘Oxidation behavior of ceramic coatings on Ti–6Al–4V by micro-plasma oxidation’, J. Mater. Proc. Technol., 2007, 190, 117–122.
13.
HeX. D., LiY. B., WangL. D., SunY. and ZhangS.:‘High emissivity coatings for high temperature application: Progress and prospect’, Thin. Solid. Films., 2009, 517, 5120–5129.
14.
ZhaoX., HeX. D., SunY. and WangL. D.:‘Carbon nanotubes doped SiO2/SiO2–PbO double layer high emissivity coating’, Mater. Lett., 2011, 65, 2592–2592.
15.
WangZ. W., WangY. M., LiuY., X uJ. L., GuoL. X., ZhouY., OuyangJ. H. and DaiJ. M.:‘Microstructure and infrared emissivity property of coating containing TiO2 formed on titanium alloy by microarc oxidation’, Curr. Appl. Phys., 2011, 11, 1405–1409.
16.
WangY. M., TianH., QuanD. L., GuoL. X., OuyangJ. H., ZhouY. and JiaD. C.:‘Preparation, characterization and infrared emissivity properties of polymer derived coating formed on 304 steel’, Surf. Coat. Technol., 2012, 206, 3772–3776.
17.
TorreyJ. D. and BordiaR. K.:‘Composite polymer derived ceramic system for oxidizing environments’, J. Mater. Sci., 2006, 41, 4617–4622.
18.
YankovR. A., KolitschA., von BoranyJ., MücklichA., MunnikF., DonchevA. and SchützeM.:‘Surface protection of titanium and titanium–aluminum alloys against environmental degradation at elevated temperatures’, Surf. Coat. Technol., 2012, 206, 3595–3600.
19.
YuH. J., XuG. Y., ShenX. M., YanX. X., ShaoC. M. and HuC.:‘Effects of size, shape and floatage of Cu particles on the low infrared emissivity coatings’, Prog. Org. Coat., 2009, 66, 161–166.
