Formation of niobium carbonitride from Nb$sub 2$$O$$sub 5$ and graphite in a plasma arc

Journal Article · Mon Sep 01 04:00:00 EDT 1975 · High Temp. Sci., v. 7, no. 3, pp. 167-172

OSTI ID:4179914

Saito, M; Matsumoto, O

A mixture of Nb$sub 2$$O$$sub 3$ and graphite was heated in an argon- nitrogen mixed plasma arc to form niobium excess carbonitride. Nearly stoichiometric fcc niobium carbonitride (NbC/sub x/N/sub y/, x + y approximately equal to 1) was formed by nitriding a nonstoichiometric specimen in a nitrogen atmosphere at 1500$sup 0$C. Measured density values were in agreement with the x- ray densities. Products were found to be superconductors and the transition temperatures varied with composition. The highest transition temperature, observed for NbC$sub 0$$.$$sub 31$$N$$sub 0$$.$$sub 66$, was 17.7$sup 0$K. (auth)

• Research Organization: Aoyama Gakuin Univ., Tokyo
• NSA Number: NSA-33-005955
• OSTI ID: 4179914
• Journal Information: High Temp. Sci., v. 7, no. 3, pp. 167-172, Journal Name: High Temp. Sci., v. 7, no. 3, pp. 167-172; ISSN HITSA
• Country of Publication: United States
• Language: English

Related Subjects

*NIOBIUM CARBIDES-- SUPERCONDUCTIVITY
*NIOBIUM OXIDES-- SUPERCONDUCTIVITY
360101* --Materials--Metals & Alloys--Preparation & Fabrication
CARBONITRIDES
CHEMICAL COMPOSITION
DENSITY
N50220* --Metals
Ceramics
& Other Materials--Metals & Alloys--Preparation & Fabrication
N50230 --Metals
Ceramics
& Other Materials--Metals & Alloys--Properties
Structure & Phase Studies
N66200 --Physics (Low Temperature)--Superconductivity
NIOBIUM NITRIDES
NITRIDATION
PLASMA
QUANTITY RATIO
TRANSITION TEMPERATURE