Preparation and properties of reticulated porous gamma-Y2Si2O7 ceramics with high porosity and relatively high strength

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	Preparation and properties of reticulated porous gamma-Y2Si2O7 ceramics with high porosity and relatively high strength
	Z. Wu; L. C. Sun; Z. L. Tian; J. Y. Wang; J. N. Li; Z. J. Hu
	2014
发表期刊	Ceramics International
ISSN	0272-8842
卷号	40 期号:7 页码:10013-10020
摘要	Dense y-Y2Si2O7 ceramics are promising silicates with very low thermal conductivity, good damage tolerance and hot corrosion resistance. However, processing of porous gamma-Y2Si2O7 was not reported in early literatures. In this paper, reticulated porous gamma-Y2Si2O7 ceramics with high porosity (similar to 85%) and relatively high compressive strength (similar to 1.28 MPa) are successfully fabricated by the polymeric sponge impregnation method. The main compositions of the slurry are Y2SiO5 and silica sol. Samples are sintered at the temperature of 1550 degrees C to obtain porous gamma-Y2Si2O7 ceramics by reaction bonding; and the samples are recoated 3 times to enhance the compressive strength of porous ceramics. Scanning electron microscopy and X-ray tomography investigations show that the pore size distribution of the as-prepared porous gamma-Y2Si2O7 ceramic ranges from 200 to 700 mu m; meanwhile, the sample possesses fully open and highly interconnected pores. Influences of pretreatments of sponge on the compressive strengths of samples are also investigated. This work reports a new porous ceramic material (gamma-Y2Si2O7) with high permeability, high strength and controllable macrostructure. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
部门归属	[wu, zhen ; sun, luchao ; tian, zhilin ; wang, jingyang] chinese acad sci, inst met res, shenyang natl lab mat sci, high perfomance ceram div, shenyang 110016, peoples r china. [wu, zhen] univ sci & technol china, dept mat sci & engn, hefei 230026, peoples r china. [li, junning ; hu, zijun] aerosp res inst mat & proc technol, beijing 100076, peoples r china. ; wang, jy (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, high perfomance ceram div, shenyang 110016, peoples r china. ; jywang@imr.ac.cn
关键词	High Porosity High Strength Polymeric Sponge Impregnation Method Porous Gamma-y2si2o7 Ceramics Mechanical-properties Oxidation Protection Yttrium Silicate Composites Coatings
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/72940
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. Wu,L. C. Sun,Z. L. Tian,et al. Preparation and properties of reticulated porous gamma-Y2Si2O7 ceramics with high porosity and relatively high strength[J]. Ceramics International,2014,40(7):10013-10020.
APA	Z. Wu,L. C. Sun,Z. L. Tian,J. Y. Wang,J. N. Li,&Z. J. Hu.(2014).Preparation and properties of reticulated porous gamma-Y2Si2O7 ceramics with high porosity and relatively high strength.Ceramics International,40(7),10013-10020.
MLA	Z. Wu,et al."Preparation and properties of reticulated porous gamma-Y2Si2O7 ceramics with high porosity and relatively high strength".Ceramics International 40.7(2014):10013-10020.