TY - JOUR
T1 - Powder Metallurgical Processing of Al–5 wt% Cu Matrix Composites Reinforced with MoSi2 and WSi2 Particulates
AU - Mertdinç-Ülküseven, Sıddıka
AU - Ovalı-Döndaş, Didem
AU - Süzer, İlayda
AU - Altıntaş, Mert
AU - Can Karaca, Murat
AU - Özal, Bahadır
AU - Ağaoğulları, Duygu
AU - Öveçoğlu, Mustafa Lütfi
N1 - Publisher Copyright:
© 2024 Wiley-VCH GmbH.
PY - 2024
Y1 - 2024
N2 - Herein, investigations on the microstructural, physical, and mechanical properties of molybdenum disilicide (MoSi2)- and tungsten disilicide (WSi2)-reinforced aluminum (Al)–copper (Cu) matrix composites are reported. Powder metallurgy methods such as mechanochemical synthesis (MCS), mechanical alloying (MA), cold pressing, and pressureless sintering are combined to produce composites. First of all, MoSi2 and WSi2 nanoparticles are synthesized by MCS and selective acid leaching, yielding reinforcement materials for Al–Cu matrix. Powder blends consisting of 95 wt% Al and 5 wt% Cu are mixed with metal disilicides at different weight percentages (1, 2, and 5 wt%). MA for 4 h is conducted on these overall blends using a high-energy ball mill. Microstructural and thermal properties of the as-blended and mechanically alloyed powders are determined, and then they are compacted under 450 MPa and sintered at 550 °C for 2 h. Mechanical characterization of the composites reveals an increase in hardness and wear resistance with an increasing amount of reinforcement content. Among bulk samples, 5 wt% WSi2-reinforced composites have the highest microhardness (165 ± 15 HV) and lowest wear rate (1.69 × 106 μm3 Nm−1) values. However, under the compression forces, the highest toughness and strength are obtained from 2 wt%-reinforced composites.
AB - Herein, investigations on the microstructural, physical, and mechanical properties of molybdenum disilicide (MoSi2)- and tungsten disilicide (WSi2)-reinforced aluminum (Al)–copper (Cu) matrix composites are reported. Powder metallurgy methods such as mechanochemical synthesis (MCS), mechanical alloying (MA), cold pressing, and pressureless sintering are combined to produce composites. First of all, MoSi2 and WSi2 nanoparticles are synthesized by MCS and selective acid leaching, yielding reinforcement materials for Al–Cu matrix. Powder blends consisting of 95 wt% Al and 5 wt% Cu are mixed with metal disilicides at different weight percentages (1, 2, and 5 wt%). MA for 4 h is conducted on these overall blends using a high-energy ball mill. Microstructural and thermal properties of the as-blended and mechanically alloyed powders are determined, and then they are compacted under 450 MPa and sintered at 550 °C for 2 h. Mechanical characterization of the composites reveals an increase in hardness and wear resistance with an increasing amount of reinforcement content. Among bulk samples, 5 wt% WSi2-reinforced composites have the highest microhardness (165 ± 15 HV) and lowest wear rate (1.69 × 106 μm3 Nm−1) values. However, under the compression forces, the highest toughness and strength are obtained from 2 wt%-reinforced composites.
KW - Al–Cu metal matrix composites
KW - mechanical alloying
KW - molybdenum disilicides
KW - pressureless sintering
KW - tungsten disilicides
UR - http://www.scopus.com/inward/record.url?scp=85204718842&partnerID=8YFLogxK
U2 - 10.1002/adem.202400622
DO - 10.1002/adem.202400622
M3 - Article
AN - SCOPUS:85204718842
SN - 1438-1656
JO - Advanced Engineering Materials
JF - Advanced Engineering Materials
ER -