Nanostructured hard material composites by molecular engineering .1. Synthesis from soluble tungstate salts
1997 (English)In: Nanostructured materials, ISSN 0965-9773, E-ISSN 1872-9150, Vol. 9, no 1-8, 105-108 p.Article in journal (Refereed) Published
A key issue, in the development of very fine grades, is to produce materials with high uniformity. The aqueous chemistry of tungsten offers several possibilities for the synthesis of homogenous molecular precursors containing W and Co mixed on the atomic scale. Powders containing (NH4)(8)[H2Co2W11O40] have been prepared starting from sodium tungstate or ammonium metatungstate. Nanophase powders of W-Co and WC-Co powders were obtained after reduction at 750 degrees C under H-2 and carburisation at 1000 degrees C under H-2/CH4. Hard materials with submicron microstructures were obtained after sintering at 1410 degrees C.
Place, publisher, year, edition, pages
1997. Vol. 9, no 1-8, 105-108 p.
IdentifiersURN: urn:nbn:se:kth:diva-43125DOI: 10.1016/S0965-9773(97)00029-9ISI: A1997XB96900018OAI: oai:DiVA.org:kth-43125DiVA: diva2:447782
QC 201110132011-10-132011-10-132014-12-01Bibliographically approved