Consolidation of Tungsten Disilicide WSi2 by Plasma Spraying
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F07%3A00023202" target="_blank" >RIV/00216224:14310/07:00023202 - isvavai.cz</a>
Alternative codes found
RIV/61389021:_____/07:00095257 RIV/60461373:22310/07:00018197
Result on the web
—
DOI - Digital Object Identifier
—
Alternative languages
Result language
angličtina
Original language name
Consolidation of Tungsten Disilicide WSi2 by Plasma Spraying
Original language description
Wear-resistant and heat-resistant coatings as well as free-standing parts of tungsten disilicide were manufactured by plasma spraying. Tungsten disilicide powder was processed by water stabilized plasma, generated by IPPs WSP plasma torch, which can reach exit temperatures up to 28000 K. Oxidation of the molten silicide was prevented by an argon protective atmosphere and by "auto-shrouding" effect. Their mechanical and oxidation behavior was compared with samples prepared by powder metallurgy techniques, sintered in the ASEA apparatus and also in the HP-type apparatus. Heat-resistant coatings exhibited high resistance against oxidation similarly to MoSi2 produced by the same way. Tungsten disilicide feedstock was prepared by direct heating of the powder mixture of tungsten and silicon at 1350-1400 C and secondly by plasma spheoidization of granules (20-63 microns in size) of powder mixture of tungsten and silicon with 3% of a polyvinylalcohol binder by the technique known as freeze gra
Czech name
Slinování disilicidu wolframu plazmovým nástřikem
Czech description
Otěruvzdorné a žárovzdorné povlaky a skořepinové součásti z disilicidu wolframu byly připraveny plazmovým nástřikem. Disilicid byl zpracován ve vodou stabilizovaném plazmatu z generátoru WSP, které v ústí trysky dosahuje teploty až 28000 K. Oxidace taveného disilicidu byla potlačena ochrannou atmosférou tzv. autoshrouding-efektu. Mechanické a korozní vlastnosti plazmově deponovaných vzorků byly porovnány se vzorky, připravenými metodami práškové metalurgie, slinutými metodou HIP a HP v podmínkách 100-270 MPa a 1700-1800 C.K plazmovým depozicím byla použita směs wolframu a křemíku s polyvinylalkoholovou vazbou, sferoidizovaná metofou freeze granulation.
Classification
Type
D - Article in proceedings
CEP classification
JG - Metallurgy, metal materials
OECD FORD branch
—
Result continuities
Project
<a href="/en/project/GA104%2F05%2F0540" target="_blank" >GA104/05/0540: New tungsten-based materials</a><br>
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2007
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
EURO PM 2007 Proceedings, Vol. 2
ISBN
978-1-899072-30-9
ISSN
—
e-ISSN
—
Number of pages
6
Pages from-to
431-436
Publisher name
EPMA Shrewsbury
Place of publication
Shrewsbury, UK
Event location
Toulouse, Francie
Event date
Oct 15, 2007
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
—