CHROMIUM VAPOR PRESSURE OVER SOLID CHROMIUM-IRON ALLOYS

Journal Article · Tue Feb 11 04:00:00 EST 1958 · Doklady Akad. Nauk S.S.S.R.

OSTI ID:4306348

Vintaikin, E Z

The chromium vapor pressure over chromium-iron alloys was measured in the temperature range 1100 deg to 1400 deg C to determine the thermodynamic functions of the solutions. The Knudsen effusion method with radiometric determination was used to evaluate the quantity of chromium condensed on targets. Electronic iron and chromium (the latter containing Cr/sup 51/) were melted in aluudum crucibles in a helium atmosphere. The results obtained for chromium vapor pressure were in good agreement with the published data. A diagramn is given of the thermodynamic activity of iron-chromium alloys at 1667 deg K. The thermal sublimation and partial heats of chromium solubility are tabulated. The critical dissociation temperature is 600 deg C. The embrittlement as a factor of cleavage was found at 475 deg C. Consequently, it was assumed that the solid alpha solution can convert into sigma phase or dissociate into two solid solutions. (R.V.J.)

• Research Organization: Central Research Inst. of Iron Metallurgy
• NSA Number: NSA-12-010641
• OSTI ID: 4306348
• Journal Information: Doklady Akad. Nauk S.S.S.R., Journal Name: Doklady Akad. Nauk S.S.S.R. Vol. Vol: 118
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

ALUMINUM OXIDES
ALUNDUM
CLEAVAGE
CRYSTALS
FAILURES
KNUDSEN EFFUSION
MINERALOGY, METALLURGY, AND CERAMICS