Preparation of spherical Y2SiO5 powders for thermal-spray coating--颗粒学报PARTICUOLOGY

Qian, Y., Du, L., & Zhang, W. (2009). Preparation of spherical Y2SiO5 powders for thermal-spray coating. Particuology, 7(5), 368–372. https://doi.org/10.1016/j.partic.2009.05.003

Preparation of spherical Y₂SiO₅ powders for thermal-spray coating

Yangbao Qian ^{a b}, Linzhong Du ^a, Weigang Zhang ^a *

a State Key Laboratory of Multi-phase Complex System, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
b Graduate University of Chinese Academy of Sciences, Beijing 100049, China

10.1016/j.partic.2009.05.003

Volume 7, Issue 5, October 2009, Pages 368-372

Received 31 March 2009, Revised 18 May 2009, Accepted 24 May 2009, Available online 19 August 2009.

E-mail: wgzhang@home.ipe.ac.cn

Highlights

Abstract

Yttrium silicate, for its high oxidation resistance, is an important candidate for protective coating for carbon-fiber-reinforced composites at temperatures above 1600 °C. A novel method, consisting of co-precipitation, spray-drying, heat-treatment and plasma-densification, is developed to prepare Y₂SiO₅ powders for thermal-spraying. The composition, morphology and flowability of the synthesized Y₂SiO₅ powders are investigated by XRD, SEM and Hall Flowmeter, respectively. The results show that the synthesized Y₂SiO₅ powders are nearly spherical with high purity. The apparent density and flowability of the Y₂SiO₅ powders are 1.87 g/cm³ and 37 s/50 g, respectively, which lead to a high deposition efficiency of up to 80% for atmospheric plasma spraying.

Graphical abstract

Keywords

Yttrium silicate; Thermal-spraying; Oxidation protection coating

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