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Projects / Programmes source: ARIS

Preparation and characterisation of Al alloys composites discontinuously reinforced by ceramic particles - Development of chemically activated foundry processes and in situ methods

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Research activity

Code Science Field Subfield
2.04.02  Engineering sciences and technologies  Materials science and technology  Metallic materials 

Code Science Field
T000  Technological sciences   
T152  Technological sciences  Composite materials 
Keywords
surface activation of ceramic reinforcement, stabliisation of ceramic particles in melt, solubility of hydrogen, wettability
Evaluation (rules)
source: COBISS
Evaluation of bibliographic research performance indicators according to ARIS methodology
Citations Citations for bibliographic records in COBIB.SI that are linked to records in citation databases
source: WoS source: Scopus source: COBISS
Researchers (6)
no. Code Name and surname Research area Role Period No. of publications
1.  00741  Bojan Breskvar  Materials science and technology  Researcher  1997 - 1999  160 
2.  17201  Uroš Sirk    Researcher  1997 - 1999  4 
3.  00735  PhD Anton Smolej  Materials science and technology  Researcher  1997 - 1999  276 
4.  08195  PhD Borivoj Šuštaršič  Materials science and technology  Researcher  1999  412 
5.  05438  PhD Matjaž Torkar  Materials science and technology  Head  1997 - 1999  469 
6.  05770  PhD Leopold Vehovar  Materials science and technology  Researcher  1998 - 1999  179 
Organisations (2)
no. Code Research organisation City Registration number No. of publications
1.  0206  Institute of Metals and Technology  Ljubljana  5051622000  5,981 
2.  1555  University of Ljubljana, Faculty of Natural Sciences and Engeneering  Ljubljana  1627074  19,855 
Abstract
Properties of MMC composites reinforced by ceramic particles depends on the properties of interface particle/metallic matrix. Theoretical studies and researches showed that particles of SiC are more stable in the Al with increased content of Si and Mg. The possible way for the forming of composite is thus the introduction of SiC particles into Al-Si-Mg alloy with later correction of the matrix compositon. Improvement of wetting by chemical activation of surface of particles is one of the most important parameters at foundry method of MMC production, but the processes at the interface are not well known. Reserch showed also an important influence of dissolved hydrogen. The nucleation of micropores with high pressure hydrogen at the interface particle/matrix hinders the benefits of improved wetting. The problems with wetting and hydrogen induced microcraks can be avoided by consolidation of MMC composite from mixture of powders. Hot rolling of Al/SiC powder mixture in Al-container was tested.
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