Demixing in system titanium--niobium--oxygen

Journal Article · Sun Jul 01 04:00:00 EDT 1973 · Inorg. Mater. (USSR) (Engl. Transl.), v. 9, no. 7, pp. 1126-1127

OSTI ID:4362555

Dekanenko, V M; Vavilova, V V; Kornilov, I I

To determine the demixing limits, the cross sections NbO-- TiO, NbO-- Ti/ sub 3/O, Nb-- Ti/sub 3/O and Ti-- NbO, and the cross sections containing 5, 10, 15, 20, 30, and 40 at.% Ti were investigated. It was found that Nb-- Ti/sub 3/O is a quasi-binary cross section and the demixing region is enclosed within the concentration triangle Nb-- Ti/sub 3/O--O. The simultaneous presence of titanium and oxygen in niobium leads to layer separation. During layer separation, titanium, which has a high affinity for oxygen actively reacts with it to form lowdensity oxides, which become detached from the heavier niobiumbased alloy. At high contents titanium combines practically all the oxygen. During this process niobium is refined. If the titanium content is insufficient, complex oxides containing niobium as well are formed. The high affinity of titanium for oxygen, and the low density of the titanium oxides formed, are apparently the cause of layer separation in the system titanium--niobium -- oxygen. (auth)

• Research Organization: Inst. of Metallurgy, Moscow
• NSA Number: NSA-29-016177
• OSTI ID: 4362555
• Journal Information: Inorg. Mater. (USSR) (Engl. Transl.), v. 9, no. 7, pp. 1126-1127, Journal Name: Inorg. Mater. (USSR) (Engl. Transl.), v. 9, no. 7, pp. 1126-1127; ISSN INOMA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

*NIOBIUM ALLOYS-- PHASE STUDIES
*NIOBIUM OXIDES-- PHASE STUDIES
*TITANIUM BASE ALLOYS-- PHASE STUDIES
*TITANIUM OXIDES-- PHASE STUDIES
LAYERS
MICROSTRUCTURE
MIXTURES
N50130* --Metals
Ceramics
& Other Materials--Ceramics & Cermets--Properties
Structure & Phase Studies
NIOBIUM
OXIDATION
OXYGEN
SCALING
SEPARATION PROCESSES
TITANIUM
X-RAY SPECTRA