Phase composition and structure of composite powders based on solid solutions of SiC and AlN
Powder Metallurgy and Metal Ceramics(1997)
Abstract
The structure of SiC–AlN powders is investigated by x-ray diffraction and transmission electron microscopy methods. The powders were produced by joint carbon reduction and nitriding of silicon and aluminum oxide mixtures. The results show that a mixture of solid solutions forms during joint SiC and AlN synthesis at 1700°C, with SiC forming β (3C) and α (2H) modifications with different grain morphology. The fiber form is characteristic of β-SiC, whereas the grains of the solid solution based on SiC have a predominantly equiaxed form. α-SiC grain dimensions are considerablys smaller than those of AlN.
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Key words
Solid Solution,Wurtzite Structure,Aluminum Nitride,Solid Solution Form,Transmission Electron Microscopy Method
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