Determination of silicon content in heat-resistant nickel alloys

Titov V.I., Goundobin N.V., Pilipenko L.V.
UDC
54.063
DOI
10.18577/2307-6046-2014-0-12-9-9
Article PDF (Russian) (379.85 KB)
How to cite
Titov V.I., Goundobin N.V., Pilipenko L.V. Determination of silicon content in heat-resistant nickel alloys // Proceedings of VIAM. 2014. No. 12. DOI: 10.18577/2307-6046-2014-0-12-9-9. URL: https://test.viam.ru/en/journal/2014/12/9
Abstract

A possibility of determination of silicon content in heat-resistant nickel alloys (HNA) is surveyed in this work. Silicon in amount >0,4% mass. enriches grain boundaries of the alloy promoting precipitation of plate-shaped M6C carbide films and TCP phase formation and reduction in strength and plastic properties. Rhodamine C was applied at the development of a method for determination of the silicon content in the range of 0,005–0,1% mass. in HNA. The experimental part was to prepare a standard silicon solution, to choose optimal conditions for reaction of «silicon molybdic acid – rhodamine C» complex formation, to verify an influence of environment acidity on the salt formation process of silicon mo-lybdate ions with rhodamine C, the complex stability in time. As a result of the work, a method of direct photometry was developed by which the silicon content can be determined in heat-resistant nickel alloys within the concentration range of 0.005–0.1 % mass.

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