The Phase Diagram of the Niobium-Carbon System

Journal Article · Sat Apr 01 04:00:00 EST 1961 · Transactions of the Japan Institute of Metals

DOI:https://doi.org/10.2320/matertrans1960.2.98· OSTI ID:4818297

Kimura, Hiroz^|^ocirc;; Sasaki, Yasuo

This niobium-carbon system is investigated by melting point measurements, x-ray analyses, and microscopic examinations. An equilibrium diagram up to 63.5 atomic percent carbon is shown. The limit of carbon solubility in niobium ( alpha ) phase lies at about 2 atomic percent at 2000 deg C and it decreases abruptly as the temperature decreases. The Nb₂C( beta ) phase has a very narrow range of homogeneity and the NbC( gamma ) phase exists in a wide composition range from 41 to 50 atomic percent carbon below l400 deg C. Three non-variant reactions in this system are determined. (auth)

• Research Organization: National Research Inst. for Metals, Science and Technics Agency, Tokyo
• Sponsoring Organization: USDOE
• NSA Number: NSA-16-007914
• OSTI ID: 4818297
• Journal Information: Transactions of the Japan Institute of Metals, Journal Name: Transactions of the Japan Institute of Metals Journal Issue: 2 Vol. 2; ISSN 0021-4434
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ALLOTROPY
CARBIDES
DIFFRACTION
MELTING POINTS
METALS, CERAMICS, AND OTHER MATERIALS
MICROSCOPY
NIOBIUM ALLOYS
NIOBIUM CARBIDES
PHASE DIAGRAMS
SOLUBILITY
X RADIATION