Synthesis and characterization of Yb and Er based monosilicate powders and durability of plasma sprayed Yb2SiO5 coatings on C/C-SiC composites

	Synthesis and characterization of Yb and Er based monosilicate powders and durability of plasma sprayed Yb2SiO5 coatings on C/C-SiC composites
	Khan ZS ; Zou BL ; Huang WZ ; Fan XZ ; Gu LJ ; Chen XL ; Zeng SB ; Wang CJ ; Cao XQ
刊名	materials science and engineering b-advanced functional solid-state materials
	2012
卷号	177 期号:2 页码:184-189
关键词	X-RAY-DIFFRACTION SOL-GEL SYNTHESIS CERAMICS
ISSN号	0921-5107
通讯作者	cao xq
中文摘要	rare-earth silicates such as yb2sio5 and er2sio5 are promising environmental barrier coating materials for ceramic matrix composites. in this work, yb2sio5 and er2sio5 ceramic powders have been synthesized by solid-state reaction using yb2o3, er2o3 and sio2 as starting materials. the fabricated powders were subjected to spray drying treatment for subsequent synthesis of coatings by plasma spraying. the spray drying resulted in well-dispersed and spherical powder particles with good flowability. analytical techniques such as x-ray diffraction (xrd), scanning electron microscopy (sem), thermogravimetry and differential scanning calorimetry (tga/dsc) and dilatometry were applied to study the microstructural and thermal characteristics of the powders. ultra-high purity monosilicate powders formed as a result of heating treatments at 1400 degrees c in a box furnace for 20h. tg/dsc revealed the genesis temperatures of the silicate formation (low temperature polymorphs) and also showed that the solid-state reactions to form yb and er based monosilicates proceeded without any weight-loss in the tested temperature range. the values of coefficients of thermal expansion (cte) of the fabricated compounds are found to be 7.1 ppm/degrees c for yb2sio5 and 7.5 ppm/degrees c for er2sio5 by dilatometric measurements. besides these studies, coating formation by plasma spraying of spray-dried yb2sio5 powders on the ceramic matrix composite specimen such as c/c-sic has also been evaluated. well-adhered and uniformed coatings result on composite specimens whose durability is tested by thermal cycling from similar to 400 degrees c to 1500 degrees c in a gas burner rig. (c) 2011 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:000300275600011
公开日期	2013-06-08
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/48324]
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,Huang WZ,et al. Synthesis and characterization of Yb and Er based monosilicate powders and durability of plasma sprayed Yb2SiO5 coatings on C/C-SiC composites[J]. materials science and engineering b-advanced functional solid-state materials,2012,177(2):184-189.
APA	Khan ZS.,Zou BL.,Huang WZ.,Fan XZ.,Gu LJ.,...&Cao XQ.(2012).Synthesis and characterization of Yb and Er based monosilicate powders and durability of plasma sprayed Yb2SiO5 coatings on C/C-SiC composites.materials science and engineering b-advanced functional solid-state materials,177(2),184-189.
MLA	Khan ZS,et al."Synthesis and characterization of Yb and Er based monosilicate powders and durability of plasma sprayed Yb2SiO5 coatings on C/C-SiC composites".materials science and engineering b-advanced functional solid-state materials 177.2(2012):184-189.