Strength and thermal stability of Cu-Al2O3 composite obtained by internal oxidation
Апстракт
The objective of the work is to study the effects of the high-energy milling on strengthening, thermal stability and electrical conductivity of Cu-Al2O3 composite. The prealloyed copper powders, atomized in inert gas and containing 3 wt. % Al, were milled up to 20 h in the planetary ball mill to oxidize in situ aluminium with oxygen from the air. Composite compacts were obtained by hot-pressing in an argon atmosphere at 800 degrees C for 3 h under the pressure of 35 MPa. The microstructural characterization was performed by the optical microscope, scanning electron microscope (SEM), transmission electron microscope (TEM) and X-ray diffraction analysis (XRD). The microhardness, electrical conductivity and density measurements were also carried out. The effect of internal oxidation and high-energy milling on strengthening of Cu-Al2O3 composite was significant, The increase of the microhardness of composite compacts (292 HV) is almost threefold comparing to compacts processed from the as-...received Cu-3 wt. % Al powder (102 HV). The grain size of Cu-Al2O3 compacts processed from 5 and 20 h-milled powders was 75 and 45 nm, respectively. The small increase in the grain size and the small microhardness drop indicate the high thermal stability of Cu-Al2O3 composite during high-temperature exposure at 800 degrees C.
Кључне речи:
Powder processing / Metal matrix composites / Microstructural characterization / Microhardness / High-temperature propertiesИзвор:
Revista de Metalurgia, 2010, 46, 6, 520-529Финансирање / пројекти:
- Синтеза и особине наноструктурних металних, интерметалних и композитних материјала (RS-MESTD-MPN2006-2010-142027)
DOI: 10.3989/revmetalmadrid.1024
ISSN: 0034-8570
WoS: 000290597000005
Scopus: 2-s2.0-79953210370
Колекције
Институција/група
VinčaTY - JOUR AU - Rajković, Višeslava M. AU - Božić, Dušan AU - Devečerski, Aleksandar AU - Bojanic, S. AU - Jovanović, Milan T. PY - 2010 UR - https://vinar.vin.bg.ac.rs/handle/123456789/4311 AB - The objective of the work is to study the effects of the high-energy milling on strengthening, thermal stability and electrical conductivity of Cu-Al2O3 composite. The prealloyed copper powders, atomized in inert gas and containing 3 wt. % Al, were milled up to 20 h in the planetary ball mill to oxidize in situ aluminium with oxygen from the air. Composite compacts were obtained by hot-pressing in an argon atmosphere at 800 degrees C for 3 h under the pressure of 35 MPa. The microstructural characterization was performed by the optical microscope, scanning electron microscope (SEM), transmission electron microscope (TEM) and X-ray diffraction analysis (XRD). The microhardness, electrical conductivity and density measurements were also carried out. The effect of internal oxidation and high-energy milling on strengthening of Cu-Al2O3 composite was significant, The increase of the microhardness of composite compacts (292 HV) is almost threefold comparing to compacts processed from the as-received Cu-3 wt. % Al powder (102 HV). The grain size of Cu-Al2O3 compacts processed from 5 and 20 h-milled powders was 75 and 45 nm, respectively. The small increase in the grain size and the small microhardness drop indicate the high thermal stability of Cu-Al2O3 composite during high-temperature exposure at 800 degrees C. T2 - Revista de Metalurgia T1 - Strength and thermal stability of Cu-Al2O3 composite obtained by internal oxidation VL - 46 IS - 6 SP - 520 EP - 529 DO - 10.3989/revmetalmadrid.1024 ER -
@article{ author = "Rajković, Višeslava M. and Božić, Dušan and Devečerski, Aleksandar and Bojanic, S. and Jovanović, Milan T.", year = "2010", abstract = "The objective of the work is to study the effects of the high-energy milling on strengthening, thermal stability and electrical conductivity of Cu-Al2O3 composite. The prealloyed copper powders, atomized in inert gas and containing 3 wt. % Al, were milled up to 20 h in the planetary ball mill to oxidize in situ aluminium with oxygen from the air. Composite compacts were obtained by hot-pressing in an argon atmosphere at 800 degrees C for 3 h under the pressure of 35 MPa. The microstructural characterization was performed by the optical microscope, scanning electron microscope (SEM), transmission electron microscope (TEM) and X-ray diffraction analysis (XRD). The microhardness, electrical conductivity and density measurements were also carried out. The effect of internal oxidation and high-energy milling on strengthening of Cu-Al2O3 composite was significant, The increase of the microhardness of composite compacts (292 HV) is almost threefold comparing to compacts processed from the as-received Cu-3 wt. % Al powder (102 HV). The grain size of Cu-Al2O3 compacts processed from 5 and 20 h-milled powders was 75 and 45 nm, respectively. The small increase in the grain size and the small microhardness drop indicate the high thermal stability of Cu-Al2O3 composite during high-temperature exposure at 800 degrees C.", journal = "Revista de Metalurgia", title = "Strength and thermal stability of Cu-Al2O3 composite obtained by internal oxidation", volume = "46", number = "6", pages = "520-529", doi = "10.3989/revmetalmadrid.1024" }
Rajković, V. M., Božić, D., Devečerski, A., Bojanic, S.,& Jovanović, M. T.. (2010). Strength and thermal stability of Cu-Al2O3 composite obtained by internal oxidation. in Revista de Metalurgia, 46(6), 520-529. https://doi.org/10.3989/revmetalmadrid.1024
Rajković VM, Božić D, Devečerski A, Bojanic S, Jovanović MT. Strength and thermal stability of Cu-Al2O3 composite obtained by internal oxidation. in Revista de Metalurgia. 2010;46(6):520-529. doi:10.3989/revmetalmadrid.1024 .
Rajković, Višeslava M., Božić, Dušan, Devečerski, Aleksandar, Bojanic, S., Jovanović, Milan T., "Strength and thermal stability of Cu-Al2O3 composite obtained by internal oxidation" in Revista de Metalurgia, 46, no. 6 (2010):520-529, https://doi.org/10.3989/revmetalmadrid.1024 . .