Open AccessSpark plasma sintering of Si3N4-YAG nanocomposite
Author(s) -
П. В. Андреев,
E.Ye. Rostokina,
Л. С. Алексеева,
А. А. Мурашов,
М. С. Болдин,
С. С. Балабанов
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1014/1/012002
Subject(s) - sintering , materials science , spark plasma sintering , silicon nitride , nanocomposite , ceramic , yttrium , chemical engineering , annealing (glass) , powder mixture , silicon , metallurgy , composite material , engineering , oxide
Spark plasma sintering (SPS) of mixtures based on silicon nitride nanopowders (Si 3 N 4 ) was considered. A method for creating a mixture based on nanosized Si 3 N 4 and a sintering additive of yttrium-aluminum garnet (YAG, Al 5 Y 3 O 12 ) was developed. The precursor of the sintering additive was formed by the method of spray drying using a mixture of colloidal solutions of Al 5 (NO 3 ) 3 (OH) 12 and Y(OH) 2 (CH 3 COO). The produced mixture samples were studied by X-ray diffraction analysis and SEM. The kinetics of the SPS of the prepared mixtures was studied. The effect of preliminary annealing (up to 1000 °C) of the mixture on the formation of the YAG sintering additive have been considered, as well as the method of reactive synthesis of the sintering additive in the SPS process. It was found out that sintering of the annealed mixture does not allow forming high density ceramics. As a result of reactive sintering, ceramics based on Si 2 N 2 O were formed.