Development of methods for determining small amounts of cerium in alloys of Co–Cr–W–Ta–Ti–Ce

Titov V.I., Goundobin N.V., Pilipenko L.V.
UDC
621.791.3:543.847
DOI
10.18577/2307-6046-2016-0-3-9-9
Article PDF (Russian) (452.21 KB)
How to cite
Titov V.I., Goundobin N.V., Pilipenko L.V. Development of methods for determining small amounts of cerium in alloys of Co–Cr–W–Ta–Ti–Ce // Proceedings of VIAM. 2016. No. 3. DOI: 10.18577/2307-6046-2016-0-3-9-9. URL: https://test.viam.ru/en/journal/2016/3/9
Abstract

Cobalt-based alloys can be applied as superalloys together with nickel ones for parts operating at high temperatures. Rare earth elements (REM) have positive impact on long-term strength, ductility, viscosity, deformation of the alloy at high temperatures , and reduce the harmful effects of fusible (S, Pb, Sn, Bi), connecting them in refractory compounds. The positive effect of rare-earth elements on the alloys properties is exercises in a fairly narrow range of concentrations. Therefore, to obtain improved material properties it is necessary to strictly control the REM content in the alloys. As a result of this work the technique of determination of cerium in Co–Cr–W–Ta–Ti–Ce alloys in the concentrations range 0,002–0,02 wt. % using a reagent redoksan Ι is de-veloped.

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