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Title:Experimental investigation of the stability of particulate dispersoid suspensions in aluminium and magnesium melts
Authors:ID Kevorkijan, Varužan (Author)
ID Inštitut za kovinske materiale in tehnologije (Copyright holder)
Files:.pdf Materiali_in_tehnologije_2000_Kevorkijan_Experimental_investigation_of_the_stability_of_particulate_dispersoid_suspensions_in_aluminium.pdf (215,84 KB)
MD5: 680957B6D2B8E5F64793299EA733E48D
PID: 20.500.12556/dkum/75791d21-18b5-49f9-be42-b9ca00cd7f45
 
URL http://mit.imt.si/Revija/izvodi/mit006/kevorkijan.pdf
 
Language:English
Work type:Scientific work
Typology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Abstract:The rejection of Si3N4,Mg3N2, AlN and Si particles from different slurries consisting of molten aluminum and magnesium alloy with 10% of silicon or pure molten metals was experimentally investigated by measuring changes in the electrical resistance of the slurries before and after rejection occurred. In stirring experiments, only individual powder fractions which passed through a 45 µm sieve screen and remained on a 30 µm screenwere applied. The experiments showed that the rejection of Si3N4 particles from Al-10%Si and Mg-10%Si melts occurs when more than 17-18 vol.% of the ceramic phase is dispersed into the melt, while in pure Al and Mg molten metals spontaneous rejection occurs at 7-8 vol.% of the introduced ceramic phase. A similar tendency of rejection (at 16-18 vol.% of particulate in slurry) was also observed during the introduction of silicon particles into Al-10%Si and Mg-10%Si melts.
Keywords:metal matrix composites, particle reinforcement, interface, chemically activated wetting
Publication status:Published
Publication version:Version of Record
Year of publishing:2000
Number of pages:str. 419-423
Numbering:Letn. 34, št. 6
PID:20.500.12556/DKUM-28071 New window
ISSN:1580-2949
UDC:669.018.95:669.71:669.721
ISSN on article:1580-2949
COBISS.SI-ID:6044694 New window
NUK URN:URN:SI:UM:DK:G6WQ2SAD
Publication date in DKUM:01.06.2012
Views:1877
Downloads:93
Metadata:XML DC-XML DC-RDF
Categories:Misc.
:
KEVORKIJAN, Varužan, 2000, Experimental investigation of the stability of particulate dispersoid suspensions in aluminium and magnesium melts. Materiali in tehnologije [online]. 2000. Vol. 34, no. 6, p. 419–423. [Accessed 18 April 2025]. Retrieved from: https://dk.um.si/IzpisGradiva.php?lang=eng&id=28071
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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:Slovenian
Title:Raziskave stabilnosti suspenzije keramičnih delcev v Al in Mg talinah
Abstract:Preučevali smo stabilnost suspenzij Si3N4, Mg3N2, AlN in Si delcev (sejalna frakcija med 30 in 45 mum), dispergiranih v raztaljenem aluminiju in maagneziju ter v talinah iz Al in Mg zlitin z 10% silicija. Izločanje delcev iz talin smo eksperimentalno ugotavljali s pomočjo sprememb električne prevodnosti taline. Ugotovili smo, da prihaja do izločanja Si3N4 in Si delcev iz raztaljenih Al in Mg zlitin z 10 vol.% silicija šele, ko koncentracija delcev v obeh talinah doseže 16-18 vol.%. V primeru talin iz čistega aluminija in magnezija se Si3N4 delci večinoma izločijo, ko njihova koncentracija doseže 7-8 vol.% Za razliko od tega se delci AlN in Mg3N2, ne glede na to, ali so dispergirani v raztaljeni Al in Mg zlitini z 10% silicija ali v čisti kovini, spontano izločijo pri koncentraciji keramične faze, ki praviloma ne presega 4 vol.%. Različno stabilnost suspenzij keramičnih delcev v Al in Mg talini smo skušali pojasniti z reaktivnostjo med raztaljeno kovino in dispergiranimi delci oz. s kemijskimi reakcijami do katerih prihaja na meji med keramično fazo in talino.
Keywords:kompoziti s kovinsko osnovo, diskontinuirana ojačitev s keramičnimi delci, kemijske reakcije na fazni meji, kemično aktivirana omočljivost keramičnih delcev s talino


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