Densification and characterization of SiC-AlN composites for solar energy applications

Dina H.A. Besisa, Emad M.M. Ewais, Yasser M.Z. Ahmed, Fouad I. Elhosiny, Denis V. Kuznetsov and Thomas Fend

Renewable Energy, 2018, vol. 129, issue PA, 201-213

Abstract: In an attempt to solve one of the most critical global concerns of energy resources depletion, the present work is focused on tailoring and processing of a new volumetric receiver material for solar energy and high temperature applications. This in turn support producing a highly qualified solar receiver material for the future energy and electricity supply of Middle East and Europe. Herein, the processing and studying of the different parameters affecting on the preparation of near fully dense SiC/AlN structures and investigation of their different characteristics were achieved. These ceramic composites will constitute the final foam struts of the pores of the volumetric air receiver. Various SiC/AlN composites were designed with different ratio of AlN content (0–40%) and produced via pressureless sintering. Influence of different parameters on sintering and densification of SiC/AlN composites such as sintering atmosphere, additives and temperature were investigated in order to achieve the required and qualified properties of the final product of proposed SiC/AlN solar receiver. The quality and performance of the produced composites were evaluated and analyzed through different investigations, including XRD, densification parameters, microstructure examination and thermal properties. The results show that the best sintering conditions for producing a highly dense and qualified carbide/nitride receiver was attained at a temperature of 2080 °C in argon/vacuum with 2.5%Y + A addition. The characteristics of the investigated composites were mainly dependent on their densification behavior and AlN content. Thermal conductivity, diffusivity and coefficient of thermal expansion gave enhanced values at high temperatures. The inspected SiC/AlN composites can be strongly nominated to be used in solar energy applications.

Keywords: Solar energy; Volumetric solar receiver; SiC/AlN composites; Physical properties; Microstructure; Thermal properties (search for similar items in EconPapers)
Date: 2018
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0960148118306256
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:129:y:2018:i:pa:p:201-213

DOI: 10.1016/j.renene.2018.05.100

Access Statistics for this article

Renewable Energy is currently edited by Soteris A. Kalogirou and Paul Christodoulides

More articles in Renewable Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().