Repository logo
 
Publication

Nano-meter size WC whiskers grown over a compacted pellet of praphite: tungsten powder mixture heated with an ultra-fast heating rate by a concentrated solar beam

2007Journal article Open access
Simple item page
dc.contributor.authorDias, Susana
dc.contributor.authorOliveira, Fernando Almeida Costa
dc.contributor.authorGranier, Bernard
dc.contributor.authorBadie, Jean Marie
dc.contributor.authorFernandes, Jorge Cruz
dc.contributor.authorRosa, Luís Guerra
dc.contributor.authorShohoji, Nobumitsu
dc.date.accessioned2010-12-02T15:58:48Z
dc.date.available2010-12-02T15:58:48Z
dc.date.issued2007
dc.description.abstractIn equilibrium binary W-C system, mono-carbide WC is acknowledged as the stable phase under presence of excess free carbon up to temperature 2700 C whereas sub-carbideW2C would form between 1250 C and 2700 C under the carbon-deficiency condition. In unique setup of solar furnace at PROMES-CNRS in Odeillo (France), temperature of specimen is raised from the ambient temperature to target temperature up to 2000 C within fractions of a second. In the recent experimental attempts of W2C phase synthesis using this unique experimental facility starting from compacted pellet consisted of graphite and tungsten powders at ratios smaller than 0.50, we detected growth of nano-meter size WC whisker at the top surface directly exposed to the concentrated solar beam. The presence of WC was confirmed also by X-ray diffraction (XRD) of the top surface but, when the specimen as a whole was subjected to powder XRD analysis, WC became indiscernible being masked by principal W2C phase. Mechanism of formation of the detected WC nano-whisker over sub-stoichiometric C/W pellet during ultra-fast heating by concentrated solar beam is discussed.por
dc.identifier.citationDias, S.; Oliveira, F. A. C.; Granier, B.; Badie, J. M.; Fernandes, J. C.; Rosa, L. G.; Shohoji, N. Nano-meter size WC whiskers grown over a compacted pellet of praphite: tungsten powder mixture heated with an ultra-fast heating rate by a concentrated solar beam. In: Materials Transactions, 2007, vol. 48, nº. 5, p. 919- 923por
dc.identifier.urihttp://hdl.handle.net/10400.9/1083
dc.language.isoengpor
dc.subjectTungsten mono-carbide nano-whiskerpor
dc.subjectScanning electron microscopypor
dc.subjectSolar furnacepor
dc.subjectUltra-fast heatingpor
dc.titleNano-meter size WC whiskers grown over a compacted pellet of praphite: tungsten powder mixture heated with an ultra-fast heating rate by a concentrated solar beampor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage923por
oaire.citation.startPage919por
oaire.citation.titleMaterials Transactionspor
person.familyNameOliveira
person.familyNameFernandes
person.givenNameFernando
person.givenNameJorge
person.identifier647144
person.identifier.ciencia-id561B-597F-9D55
person.identifier.ciencia-id7B1F-EB22-9FF4
person.identifier.orcid0000-0002-1503-0152
person.identifier.orcid0000-0002-1573-6067
person.identifier.ridA-2312-2011
person.identifier.ridA-5241-2013
person.identifier.scopus-author-id23019925500
person.identifier.scopus-author-id6602405560
rcaap.rightsopenAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication2c841cae-13ca-44f6-8cb1-b5ce93608bae
relation.isAuthorOfPublicationbd4f5c60-466f-4d7b-abd1-e3ffa5f4aa69
relation.isAuthorOfPublication.latestForDiscoverybd4f5c60-466f-4d7b-abd1-e3ffa5f4aa69

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
NANO-METER.pdf
Size:
192.55 KB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

ME - Artigos em revistas internacionais