MA-SHS of NbC and NbB2 in air from the Nb/B/C powder mixtures

Powder mixtures of Nb-B-C in the molar ratios of 1:1:1, 2:2:1, 3:2:2 and 3:4:1 were mechanically activated by grinding for 15-180 min using a planetary ball mill. Two Nb powders were used, one with a particle size of 5-50 micron, and the other with a particle size of 50-130 micron. The mixtures spon...

Full description

Saved in:
Bibliographic Details
Published in:Journal of the European Ceramic Society 2007, Vol.27 (2-3), p.527-530
Main Authors: TSUCHIDA, Takeshi, KAKUTA, Tsuyoshi
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Exact sciences and technology
Structural ceramics
Technical ceramics
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Powder mixtures of Nb-B-C in the molar ratios of 1:1:1, 2:2:1, 3:2:2 and 3:4:1 were mechanically activated by grinding for 15-180 min using a planetary ball mill. Two Nb powders were used, one with a particle size of 5-50 micron, and the other with a particle size of 50-130 micron. The mixtures spontaneously ignited on exposure to air, forming NbC and NbB2 by SHS. Mechanical activation was strongly dependent upon the Nb particle size, the composition of the powder mixture and the weight ratio of powder:balls. The SHS product exhibited a fine, homogeneous microstructure. 7 refs.
ISSN:0955-2219
1873-619X
DOI:10.1016/j.jeurceramsoc.2006.04.106