Protection behavior of Ti-SiO2 modified potassium silicate coating on K447a alloy at 1000 ° C

doi:10.1016/j.ceramint.2024.09.301

IMR OpenIR

	Protection behavior of Ti-SiO2 modified potassium silicate coating on K447a alloy at 1000 ° C
	Du, Yao 1,2; Chen, Zheng 1,2; Lu, Yiliang 3; Yang, Lanlan 4; Wang, Cheng 5; Zhu, Shenglong 2; Wang, Fuhui 6
通讯作者	Zhu, Shenglong(slzhu@imr.ac.cn)
	2024-12-01
发表期刊	CERAMICS INTERNATIONAL
ISSN	0272-8842
卷号	50 期号:23 页码:49552-49567
摘要	Potassium silicate coatings cured by calcium hydrogen phosphate and modified by fillers of Ti and SiO2 powders were prepared on K447A alloy at 120 degrees C. The influences of Ti, SiO2 and both powders on the oxidation behavior of the coated specimens were investigated at 1000 degrees C for 100 h in static air by thermogravimetry, SEM, XRD and EPMA. The bare K447A alloy suffered severe oxidation at 1000 degrees C, and the TGO was found to be composited of an outer layer of mixtures of NiCr2O4, CoAl2O4 and rutile TiO2, and an inner alpha-Al2O3 layer. The potassium silicate coating without filler showed local damages where formation and rapid rupture of bubbles occurred and consequently the local substrate was oxidized. The SiO2 powder in the coatings is more capable of reducing O diffusion thru the coatings than the Ti powder, while the latter is more effective in getting rid of bubble rupture than the former. Thus, the coating modified by 10 wt% Ti and 20 wt% SiO2 showed the best protective performance.
关键词	Potassium silicate coating K447A alloy Filler modification High temperature oxidation Corrosion protection
DOI	10.1016/j.ceramint.2024.09.301
收录类别	SCI
语种	英语
WOS研究方向	Materials Science
WOS类目	Materials Science, Ceramics
WOS记录号	WOS:001357002000001
出版者	ELSEVIER SCI LTD
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/191554
专题	中国科学院金属研究所
通讯作者	Zhu, Shenglong
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China 3.State Grid Smart Grid Res Inst Co Ltd, State Key Lab Adv Power Transmiss Technol, Beijing 102209, Peoples R China 4.Jiangsu Univ Sci & Technol, Sch Mat Sci & Engn, Zhenjiang 212003, Peoples R China 5.Jiangsu JITRI Rd Engn Technol & Equipment Res Inst, Xuzhou 220005, Peoples R China 6.Northeastern Univ, Shenyang Natl Lab Mat Sci, Shenyang 110819, Peoples R China
推荐引用方式 GB/T 7714	Du, Yao,Chen, Zheng,Lu, Yiliang,et al. Protection behavior of Ti-SiO2 modified potassium silicate coating on K447a alloy at 1000 ° C[J]. CERAMICS INTERNATIONAL,2024,50(23):49552-49567.
APA	Du, Yao.,Chen, Zheng.,Lu, Yiliang.,Yang, Lanlan.,Wang, Cheng.,...&Wang, Fuhui.(2024).Protection behavior of Ti-SiO2 modified potassium silicate coating on K447a alloy at 1000 ° C.CERAMICS INTERNATIONAL,50(23),49552-49567.
MLA	Du, Yao,et al."Protection behavior of Ti-SiO2 modified potassium silicate coating on K447a alloy at 1000 ° C".CERAMICS INTERNATIONAL 50.23(2024):49552-49567.