Effect of Inorganic Fillers on High Temperature Oxidation Resistance of Nano-Al/Al2O3 Modified Organic Silicone Coatings

doi:10.11901/1005.3093.2021.188

Chinese Journal of Materials Research

2022, Vol. 36

Issue (4): 271-277 DOI: 10.11901/1005.3093.2021.188

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Effect of Inorganic Fillers on High Temperature Oxidation Resistance of Nano-Al/Al₂O₃ Modified Organic Silicone Coatings

CHEN Zheng¹, YANG Fang¹, WANG Cheng²^,³(

), DU Yao², LU Yiliang², ZHU Shenglong²^,⁴^,⁵, WANG Fuhui⁴^,⁵

^1.Liaoning Technical University, College of Materials Science & Engineering, Fuxin 123000, China
^2.Shi -changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
^3.Jiangsu JITRI Road Engineering Technology and Equipment Research Institute Co. Ltd., Xuzhou 220005, China
^4.School of Materials Science and Engineering, Northeastern University, Shenyang 110189, China
^5.Shenyang National Laboratory for Materials Science, Shenyang 110016, China

Cite this article:

CHEN Zheng, YANG Fang, WANG Cheng, DU Yao, LU Yiliang, ZHU Shenglong, WANG Fuhui. Effect of Inorganic Fillers on High Temperature Oxidation Resistance of Nano-Al/Al₂O₃ Modified Organic Silicone Coatings. Chinese Journal of Materials Research, 2022, 36(4): 271-277.

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Abstract

Paints based on nano Al/Al₂O₃ modified silicone resin coupled with fillers of various amounts of inorganic powders i.e., nano-ZrO₂, sub-micro-SiC and micro-glass of softening point 450℃, were prepared and applied on 304 stainless steels. Then the oxidation test of the coated steels was carried out in air at 600℃ for 1000 h in order to reveal the effect of the fillers on the oxidation resistance of nano Al/Al₂O₃ modified silicone resin paints. Results show that all the test paints exhibited excellent oxidation resistance, while no spallation of the paints and little oxidation of the substrate beneath the paints were observed after oxidation test. It is worth noting that few micropore was observed in the tested paints coupled with 7% ZrO₂, 7% SiC and 3% glass (in mass fraction), but there exist obvious micropores in the other two paints coupled with 7% glass. Moreover, the mass gain of the former was only about 60% of those of the latter two. Therefore, it is reasonable to conclude that by coupling with lower mass fraction of glass powder, the formation of micropores in the paints may be inhibited, as a result, the oxidation resistance of the paints can further be enhanced.

Key words: failure and protection of materials anti-high temperature oxidation nano filler organosilicon 304 stainless steel

Received: 18 March 2021

ZTFLH:

TG174

Fund: National Key Research and Development Program of China(2018YFB2003601)

About author: WANG Cheng, Tel: (024)23904856, E-mail: wangcheng@imr.ac.cn

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	Zheng CHEN
	Fang YANG
	Cheng WANG
	Yao DU
	Yiliang LU
	Shenglong ZHU
	Fuhui WANG

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https://www.cjmr.org/EN/10.11901/1005.3093.2021.188 OR https://www.cjmr.org/EN/Y2022/V36/I4/271

Table 1 Chemical composition of 304 stainless steel (%, mass fraction)

Table 2 Compositions of nano- Al/Al₂O₃ particle modified silicone paints (%, mass fraction)

Fig.1 Oxidation kinetic curve of 304 stainless steel and coating at 600℃ (a) kinetic curve of 1000 h oxidation of 304SS; (b) 1000 h oxidation kinetics curves of 1#, 2#, and 3# coatings at 0 min; (c) 1000 h oxidation kinetics curves of 1#,2# and 3# coatings with 5 min as the zero point

Fig.2 XRD patterns of 304SS, 1#, 2#, and 3# coating after oxidation for 1000 h at 600℃

Fig.3 Back scatter electron images of surface (a, b) and cross-section (c) of 304SS after oxidation for 1000 h at 600℃

Fig.4 Back scatter electron images of surface and cross-section of 1# (a, b, c), 2# (d, e, f), 3# (g, h, i) as-prepared samples

Fig.5 Back scatter electron images of surface and cross-section of 1# (a, b), 2# (c, d) and 3# (e, f) coatings after oxidation for 5 min at 600℃

Fig.6 Back scatter electron images of surface and cross-section of 1# (a, b), 2# (c, d), 3# (e, f) after oxidation for 1000 h at 600℃

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