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Orolínová, Mária; Durisin, Juraj; Medvecký, Ľubomír; Ďurišinová, Katarína

doi:10.1023/a:1006730016429

Cited by 3 publications

(2 citation statements)

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“…The composite powder was prepared by modification of the mechano-chemical method based on the mechanical milling in an attritor and chemical reduction by hydrogen [18]. The Cu powder matrix is characterized by average crystallite/grain size 36 nm and 29 nm for 1 vol.% Al 2 O 3 and 5 vol.…”

Section: Experimental Materials and Methodsmentioning

confidence: 99%

Strengthening mechanisms in the nanocrystalline Cu with Al2O3

OROLINOVA¹,

ĎURIŠIN²,

ĎURIŠINOVÁ³

et al. 2021

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Nanocrystalline (nc) Cu materials with Al2O3 dispersoid (1 and 5 vol.% Al2O3) were produced using the powder metallurgy (PM) techniques. The effect of reinforcement weight fraction, deformation temperature and annealing temperature (up to 800• C) on the strength properties and the microstructure was studied. Two strengthening mechanisms were considered at room temperature, strengthening by grain refinements and dispersion strengthening (DS). The strength properties of both nc Cu composites were strongly dependent on deformation temperature and material composition. The main contribution of nanometric Al2O3 particles to the strength of composites at elevated temperatures is probably the strong pinning effect on the grain/crystallite boundaries and preventing of recrystallization process. After annealing at 0.74Tm both composites were characterized by an excellent stability of strength characteristics.K e y w o r d s : dispersion strengthened nanocrystalline copper, strengthening mechanisms, strength properties, microstructure

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Section: Experimental Materials and Methodsmentioning

confidence: 99%

Strengthening mechanisms in the nanocrystalline Cu with Al2O3

OROLINOVA¹,

ĎURIŠIN²,

ĎURIŠINOVÁ³

et al. 2021

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“…The composite powders were prepared by the mechanochemical method based on the high energy ball milling in an attritor and chemical reduction by hydrogen [11], Fig. 1.…”

Section: Experimental Materials and Methodsmentioning

confidence: 99%

The electrical properties of nanocrystalline Cu-Al2O3

Orolínová¹,

Durisin²,

Ďurišinová³

et al. 2016

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Nanocrystalline (nc) Cu powders with Al2O3 dispersoid (1-5 vol.% Al2O3) were prepared by combination of phase transformations with intensive milling and the following consolidation by pressing, sintering and hot extrusion. The electrical properties of the composites were analysed in relation to their microstructure and strength. The main contribution to the electrical resistivity was attributed to the grain/crystallite size of Cu matrix. The fraction of Fe impurities dissolved within the Cu matrix and the amount of Al2O3 particles in the Cu matrix affected the electrical resistivity remarkably. The optimal combination of electrical and strength properties can be achieved by cut-down of Al2O3 content and by optimization of dispersoid distribution in the matrix.K e y w o r d s : nanocrystalline Cu-Al2O3 alloys, dispersion strengthening, electrical properties, thermal stability

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