Novel double ceramic coatings based on Yb2Si2O7/La-2(Zr0.7Ce0.3)(2)O-7 by plasma spraying on C-f/SiC composites and their thermal shock behavior
文献类型：期刊论文
| 作者 | Khan ZS ; Zou BL ; Chen XL ; Wang CJ ; Fan XZ ; Gu LJ ; Huang WZ ; Cao XQ |
| 刊名 | surface & coatings technology
 |
| 出版日期 | 2012 |
| 卷号 | 207页码:546-554 |
| 关键词 | BARRIER COATINGS SILICON-NITRIDE EB-PVD STABILITY |
| ISSN号 | 0257-8972 |
| 通讯作者 | cao xq |
| 中文摘要 | yb2si2o7 and la-2(zr0.7ce0.3)(2)o-7 (or lz(7)c(3)) ceramic powders have been synthesized by solid-state reaction using constituent oxide powders as starting materials in appropriate molar ratios. the fabricated powders were subjected to spray drying treatment for subsequent syntheses of coatings. double ceramic layer coatings based on yb2si2o7 as interlayer and la-2(zr0.7ce0.3)(2)o-7 as the top coat are synthesized on c-f/sic composite coupons by air plasma spraying (aps). coatings are subjected to thermal shock testing between 400 degrees c and 1500 degrees c in a gas burner rig experiment. x-ray diffraction (xrd), scanning electron microscopy (sem) with energy dispersive spectroscopy (eds), and thermogravimetry with differential scanning calorimetry (tg/dsc) were performed on the processed products. our studies show that the lz(7)c(3) powders after undergoing through the plasma flame result in the formation of coating dominant in pyrochlore structure. bulk part of the lz(7)c(3) based coatings was found intact with the substrate on thermal shock testing, however, with the presence of cracks in the surface and its partial transformation into constituent oxides. meanwhile, evaporative loss of cerium happens on progressed thermal cycling. the chemical nature of interaction across the interface was assessed by heating yb2si2o7 and lz(7)c(3) powders and carrying out the xrd. at 1275 degrees c for 24 h, almost no reactions took place. however, on heating at 1475 degrees c for 24 h, microchemistry of the resulted powder is also characterized by the presence of decomposed phases of lz(7)c(3) and the reaction products, especially the cerium based di-silicate. (c) 2012 elsevier b.v. all rights reserved. |
| 收录类别 | SCI收录期刊论文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000309501600076 |
| 公开日期 | 2013-04-23 |
| 源URL | [http://ir.ciac.jl.cn/handle/322003/47991]  |
| 专题 | 长春应用化学研究所_长春应用化学研究所知识产出_期刊论文 |
| 推荐引用方式 GB/T 7714 | Khan ZS,Zou BL,Chen XL,et al. Novel double ceramic coatings based on Yb2Si2O7/La-2(Zr0.7Ce0.3)(2)O-7 by plasma spraying on C-f/SiC composites and their thermal shock behavior[J]. surface & coatings technology,2012,207:546-554. |
| APA | Khan ZS.,Zou BL.,Chen XL.,Wang CJ.,Fan XZ.,...&Cao XQ.(2012).Novel double ceramic coatings based on Yb2Si2O7/La-2(Zr0.7Ce0.3)(2)O-7 by plasma spraying on C-f/SiC composites and their thermal shock behavior.surface & coatings technology,207,546-554. |
| MLA | Khan ZS,et al."Novel double ceramic coatings based on Yb2Si2O7/La-2(Zr0.7Ce0.3)(2)O-7 by plasma spraying on C-f/SiC composites and their thermal shock behavior".surface & coatings technology 207(2012):546-554. |
入库方式： OAI收割
来源：长春应用化学研究所
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