Ambient Temperature Formation of (Ta, Nb)C and (Ta, Nb)N
Description
A tantalum/niobium concentrate has been mechanically milled with magnesium and either graphite or nitrogen for 100 h. Directly after milling the formation of MgO was evident in both systems, a mixed metal carbide (Ta, Nb)C was also present in the carbon system. A cubic phase, close to that expected for the mixed metal nitride, was found in the powder milled under nitrogen. Annealing of the powders showed the reaction was incomplete with reduced oxide phases present. The carbide/nitride phases...[Show more]
dc.contributor.author | Welham, N | |
---|---|---|
dc.date.accessioned | 2015-12-13T23:34:45Z | |
dc.identifier.issn | 0022-2461 | |
dc.identifier.uri | http://hdl.handle.net/1885/93594 | |
dc.description.abstract | A tantalum/niobium concentrate has been mechanically milled with magnesium and either graphite or nitrogen for 100 h. Directly after milling the formation of MgO was evident in both systems, a mixed metal carbide (Ta, Nb)C was also present in the carbon system. A cubic phase, close to that expected for the mixed metal nitride, was found in the powder milled under nitrogen. Annealing of the powders showed the reaction was incomplete with reduced oxide phases present. The carbide/nitride phases were readily separated from the MgO by acid leaching which left powders <5 μm in size. The leaching preferentially dissolved the smaller, more highly strained crystallites in both cases. | |
dc.publisher | Kluwer Academic Publishers | |
dc.source | Journal of Materials Science | |
dc.subject | Keywords: Niobium carbide; Niobium nitride; Tantalum nitride; Annealing; Comminution; Graphite; Leaching; Magnesia; Magnesium; Niobium compounds; Nitrides; Nitrogen; Phase separation; Powders; Tantalum carbide; Ceramic materials | |
dc.title | Ambient Temperature Formation of (Ta, Nb)C and (Ta, Nb)N | |
dc.type | Journal article | |
local.description.notes | Imported from ARIES | |
local.description.refereed | Yes | |
local.identifier.citationvolume | 34 | |
dc.date.issued | 1999 | |
local.identifier.absfor | 020406 - Surfaces and Structural Properties of Condensed Matter | |
local.identifier.ariespublication | MigratedxPub24975 | |
local.type.status | Published Version | |
local.contributor.affiliation | Welham, N, College of Physical and Mathematical Sciences, ANU | |
local.description.embargo | 2037-12-31 | |
local.bibliographicCitation.startpage | 21 | |
local.bibliographicCitation.lastpage | 27 | |
dc.date.updated | 2015-12-12T09:37:21Z | |
local.identifier.scopusID | 2-s2.0-0032652776 | |
Collections | ANU Research Publications |
Download
File | Description | Size | Format | Image |
---|---|---|---|---|
01_Welham_Ambient_Temperature_Formation_1999.pdf | 329.56 kB | Adobe PDF | Request a copy |
Items in Open Research are protected by copyright, with all rights reserved, unless otherwise indicated.
Updated: 17 November 2022/ Responsible Officer: University Librarian/ Page Contact: Library Systems & Web Coordinator