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Title:Vpliv izhodne mikrostrukture bakra na izdelavo kompozita Cu-C
Authors:ID Rudolf, Rebeka (Author)
ID Kosec, Ladislav (Author)
ID Anžel, Ivan (Author)
ID Križman, Alojz (Author)
Files:.pdf Materiali_in_tehnologije_2004_Rudolf_et_al._Vpliv_izhodne_mikrostrukture_bakra_na_izdelavo_kompozita_Cu-C.pdf (1020,68 KB)
MD5: E9F018E6A40EEE0DBED2444D004C3CE8
 
URL http://mit.imt.si/Revija/izvodi/mit046/rudolf.pdf
 
Language:Slovenian
Work type:Scientific work
Typology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Abstract:V prispevku obravnavamo proces notranjega ogljičenja, s katerim lahko izdelamo diskontinuirni kompozit Cu-C. Proces notranjega ogljičenja poteka brez pojava precipitacijske fronte, s sočasnim izločanjem grafitnih delcev po celotnem volumnu, potem ko se v trdni raztopini Cu-matice doseže, na defektih v kristalni mreži pa preseže nasičenost ogljika. Z analizo notranje ogljičenih vzorcev različnih izhodnih mikrostruktur Cu, ki so vsebovale različne vrste in koncentracije defektov (praznine, kristalne meje, dislokacije), smo ugotavljali vpliv izhodne mikrostrukture čistega Cu oz. posameznih vrst defektov na proces notranjega ogljičenja. Na osnovi dobljenih rezultatov in analiz lahko povzamemo, da pri notranjem ogljičenju različnih mikrostruktur čistega bakra precipitirajo iz kristalne mreže submikrometrsko majhni delci grafita. Volumenski delež in velikost grafitnih delcev sta odvisna od izhodne mikrostrukture bakra, temperature in časa notranjega ogljičenja. Največja gostota in najbolj enakomerna razporeditev grafitnih delcev sta doseženi pri gašenih vzorcih, kar kaže, da so klasterji praznin najbolj primerni element kristalne mreže za tvorbo grafitnih delcev.
Keywords:metalurgija, kompoziti, Cu-C, notranje ogljičenje, grafitni delci, vpliv defektov, mikrostruktura čistega bakra
Publication status:Published
Publication version:Version of Record
Year of publishing:2004
Number of pages:str. 317-324
Numbering:Letn. 38, št. 6
PID:20.500.12556/DKUM-53064 New window
ISSN:1580-2949
UDC:669.018.9:669.3:620.18
ISSN on article:1580-2949
COBISS.SI-ID:9360150 New window
NUK URN:URN:SI:UM:DK:NLYIEAQI
Publication date in DKUM:10.07.2015
Views:1336
Downloads:107
Metadata:XML DC-XML DC-RDF
Categories:Misc.
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Record is a part of a journal

Title:Materiali in tehnologije
Shortened title:Mater. tehnol.
Publisher:Inštitut za kovinske materiale in tehnologije
ISSN:1580-2949
COBISS.SI-ID:106193664 New window

Secondary language

Language:English
Title:The influence of the copper microstructure on the production of a Cu-C composite
Abstract:This paper presents the internal carbonisation process involved in the fabrication of a discontinuous Cu-C composite. The precipitation process of carbon particles does not involve the precipitation of the carbonisation front but a simultaneous precipitation of carbon particles throughout the entire volume of the Cu-matrix. The carbon concentration in the matrix reaches its maximum solubility, whereas the carbon super saturation is achieved on the defects in the crystall lattice. With an analysis of internally carbonised samples, containing different types and densities of defects (vacancies, crystall grains, dislocations) we attempted to identify the influence of the initial, pure copper microstructure and the separate types of defects on the internal carbonisation process. On the basis of the results and analyses we concluded that with internal carbonisation of the pure copper microstructure the submicron graphite particles were formed. The volume fraction and the size of the precipitated graphite particles depend on the initial copper microstructure, on the temperature and on the time of internal carbonisation. The highest density and the most uniform distribution were obtained with quenched samples. The results have shown that the clusters of vaccancies are the strongest traps for carbon atoms and the most favorable places for graphite precipitation.
Keywords:metallurgy, composites, Cu-C, internal carbonisation, graphite particles, influence of defects, pure copper microstucture


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