EFFECT OF SINTERING ATMOSPHERES ON THE PROCESSING OF SIC/ALN CERAMIC COMPOSITES

Dina H. A. Besisa; Emad M. M. Ewais; Yasser M. Z. Ahmed; Fouad I. Elhosiny; Th. Fend; D. V. Kuznetsov

doi:10.17073/1683-4518-2017-9-54-59

EFFECT OF SINTERING ATMOSPHERES ON THE PROCESSING OF SIC/ALN CERAMIC COMPOSITES

Dina H. A. Besisa, Emad M. M. Ewais, Yasser M. Z. Ahmed, Fouad I. Elhosiny, Th. Fend, D. V. Kuznetsov

https://doi.org/10.17073/1683-4518-2017-9-54-59

Full Text:

Abstract

In an attempt to provide a new advanced carbide/nitride ceramic material with high sinterability and density for high temperature and solar energy applications. This work inspected the effect of different sintering atmospheres on the processing of near-fully dense siC/AlN ceramic composites. several siC/ AlN (0‒40 wt. %) composites were produced by pressureless sintering at a temperature of 2080 oC/2h using sintering additive of 2,5 % yttria+alumina. Influences of argon/vacuum and nitrogen/vacuum atmospheres on the reaction response and the densification behavior of siC/AlN composites were examined and analyzed. Results reported that, sintering of siC/ AlN ceramics in nitrogen atmosphere increases the mass loss of the different composites during sintering and lead to dropping in their densification parameters. However, sintering in argon atmosphere promotes both of sintering and densification processes, which makes argon the more convenient gas atmosphere for siC/AlN ceramics sintering. The pressureless sintered siC/AlN composites are expected to be used in high temperature applications. Ill. 5. Ref. 32. Tab. 1.

Keywords

SiC/AlN composites, sintering atmosphere, pressureless sintering, XRD, densification parameters, microstructure,

About the Authors

Dina H. A. Besisa

Центральный металлургический научно-исследовательский институт (CMRDI), отделение огнеупорных и керамических материалов; НИТУ «МИСиС», кафедра функциональных наносистем и высокотемпературных материалов.
Egypt

Emad M. M. Ewais

Центральный металлургический научно-исследовательский институт (CMRDI), отделение огнеупорных и керамических материалов.
Egypt

Yasser M. Z. Ahmed

Fouad I. Elhosiny

Университет АйнШамс, химическое отделение, факультет науки.
Egypt

Th. Fend

Немецкий аэрокосмический центр Линдер Хоэ (Linder Höhe).
Germany

D. V. Kuznetsov

НИТУ «МИСиС».
Russian Federation

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Supplementary files

For citation: Besisa D., Ewais E., Ahmed Y., Elhosiny F., Fend T., Kuznetsov D.V. EFFECT OF SINTERING ATMOSPHERES ON THE PROCESSING OF SIC/ALN CERAMIC COMPOSITES. NOVYE OGNEUPORY (NEW REFRACTORIES). 2017;(9):54-59. https://doi.org/10.17073/1683-4518-2017-9-54-59

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