Regular features of silicon behavior in melting and directional solidification of single-crystal superalloys

Min P.G., Sidorov V.V., Vadeev V.E.
UDC
669.018.44:669.245
DOI
10.18577/2307-6046-2017-0-4-3-3
Article PDF (Russian) (503.63 KB)
How to cite
Min P.G., Sidorov V.V., Vadeev V.E. Regular features of silicon behavior in melting and directional solidification of single-crystal superalloys // Proceedings of VIAM. 2017. No. 4. DOI: 10.18577/2307-6046-2017-0-4-3-3. URL: https://test.viam.ru/en/journal/2017/4/3
Keywords
silicon, ceramic, mold, superalloy, impurities, directional solidification, refinement.
Abstract

The silicon reduction from a ceramic mold on account of melt interaction in directional solidification of ZhS32-VI and VZhM5-VI single-crystal superalloys for gas turbine blades was studied. It is proved that saturation with silicon took place for a reason of interaction of carbon with free silicon oxide included in the composition of the ceramic mold. It is founded that saturation with silicon occurs of non-carbon single-crystal alloys 4 times slower than carbon-containing alloys. The possibility of form refractory compounds with sulfur and yttrium which remove from melt by filtration with different speed was confirmed. But low efficiency of this method waw founded.

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