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Title:Visokotemperaturna stabilnost mikrostrukture hitro strjene zlitine Cu-Zr
Authors:Anžel, Ivan (Author)
Križman, Alojz (Author)
Files:URL http://www.dlib.si/details/URN:NBN:SI:doc-W7IUKZU0
 
Language:Slovenian
Work type:Not categorized (r6)
Typology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Abstract:S postopkom hitrega strjevanja lahko v zlitinskih sistemih zmanjšamo stopnjo izcejanja in velikosti zrn, ali pa dosežemo celo prenasičeno trdno raztopino. Atomizirani prahovi in hitro strjeni trakovi so v nadaljevanju procesa navadno izpostavljeni visokim temperaturam (sintranje, ekstruzija, itd.). Uporabna vrednost hitrega strjevanja je zato pri posameznem zlitinskem sistemu pogosto odvisna tudi od visokotemperaturne stabilnosti hitro strjene mikrostrukture in odpornosti delcev utrjevalne faze na rast. Z raziskavami visokotemperaturne stabilnosti mikrostrukture hitro strjenih trakov smo za zlitino Cu-Zr določili kinetiko in aktivacijsko energijo rasti delcev intermetalne faze. V prispevku predstavlejni rezultati kažejo, da je rast delcev kontrolirana z volumsko difuzijo cirkonija, in da velja zveza r3~t pri vseh raziskanih temperaturah.
Keywords:metalurgija, zlitina Cu-Zr, hitro strjevanje, Ostwaldovo zorenje
Year of publishing:1997
Publisher:Inštitut za kovinske materiale in tehnologije
Number of pages:str. 41-45
Numbering:Letn. 31, št. 1/2
UDC:669
ISSN on article:1318-0010
COBISS_ID:3010838 New window
NUK URN:URN:SI:UM:DK:V1MMX2A6
Views:950
Downloads:41
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Categories:Misc.
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Record is a part of a journal

Title:Kovine zlitine tehnologije
Shortened title:Kovine zlit. tehnol.
Publisher:Inštitut za kovinske materiale in tehnologije
ISSN:1318-0010
COBISS.SI-ID:31742209 New window

Secondary language

Language:Unknown
Abstract:The rapid solidification of the alloy is characterized by a refinement of the scale of segregation and grain size or by a significant increase in solubility. Atomized powders and rapidly solidified ribbons are in further proceeding mostly subjected to high temperature treatments (sintering, extrusion, etc.). Consequently, it is clear that the stability of the microstructure and coarsening resistance of the strengthening particles are of great importance. In researching the high temperature microstructure stability of the rapidly solidified Cu-Zr alloy, the kinetic and activation energy or the growth of dispersed intermetallic particles were determined. The results presented in this paper show that particles coarsen by bulk diffusion controlled with the diffusivity of zirconium and the 3~t relationship was obtained at all temperatures of the experiment.
Keywords:metallurgy, Cu-Zr alloys, rapid solidification, Ostwald ripening


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