TY - JOUR
T1 - High entropy (HfTiZrVNb)B2 ceramic particulate reinforced Al matrix composites
T2 - Synthesis, mechanical, microstructural and thermal characterization
AU - Süzer, İlayda
AU - Özçakıcı, Yunus Emre
AU - Tekinşen, A. Saruhan
AU - Bayrak, Kübra Gürcan
AU - Mertdinç-Ülküseven, Sıddıka
AU - Balcı-Çağıran, Özge
AU - Öveçoğlu, M. Lütfi
AU - Ağaoğulları, Duygu
N1 - Publisher Copyright:
© 2024 Elsevier Ltd and Techna Group S.r.l.
PY - 2024/8/1
Y1 - 2024/8/1
N2 - This study aims to introduce a novel type of particulate reinforced Al matrix composite. High entropy (HfTiZrVNb)B2 ceramic particulate reinforced Al matrix composites were produced via a combined process of different powder metallurgy methods. Firstly, boride compounds (HfB2, TiB2, ZrB2, VB2, NbB2) were synthesized in the laboratory scale using the related metal oxide, boron oxide, and magnesium by mechanochemical synthesis (MCS) and leaching processes under optimum conditions. Secondly, the synthesized and purified boride powders were mixed in equimolar ratios using a planetary ball mill for 72 h, and they were sintered at 2000 °C under 30 MPa via spark plasma sintering (SPS). Thirdly, equimolar high entropy (HfTiZrVNb)B2 bulks were crushed, converted into powder forms, and added into Al powders at different amounts as 1, 2, 5, 10, and 15 wt %. Lastly, these powder blends were mechanically alloyed in a vibratory ball mill for 6 h, cold pressed and pressureless sintered at 630 °C for 2 h. For characterization techniques, X-ray diffractometry (XRD), thermal analysis, scanning electron microscopy/energy dispersive spectrometry (SEM/EDS), density measurements using pycnometer and Archimedes' methods, microhardness and dry sliding wear tests were conducted on the sintered composites. The highest hardness (∼1.5 GPa) and the lowest wear rate (∼0.0012 mm3/Nm) were obtained in the Al-15 wt % (HfTiZrVNb)B2 sample.
AB - This study aims to introduce a novel type of particulate reinforced Al matrix composite. High entropy (HfTiZrVNb)B2 ceramic particulate reinforced Al matrix composites were produced via a combined process of different powder metallurgy methods. Firstly, boride compounds (HfB2, TiB2, ZrB2, VB2, NbB2) were synthesized in the laboratory scale using the related metal oxide, boron oxide, and magnesium by mechanochemical synthesis (MCS) and leaching processes under optimum conditions. Secondly, the synthesized and purified boride powders were mixed in equimolar ratios using a planetary ball mill for 72 h, and they were sintered at 2000 °C under 30 MPa via spark plasma sintering (SPS). Thirdly, equimolar high entropy (HfTiZrVNb)B2 bulks were crushed, converted into powder forms, and added into Al powders at different amounts as 1, 2, 5, 10, and 15 wt %. Lastly, these powder blends were mechanically alloyed in a vibratory ball mill for 6 h, cold pressed and pressureless sintered at 630 °C for 2 h. For characterization techniques, X-ray diffractometry (XRD), thermal analysis, scanning electron microscopy/energy dispersive spectrometry (SEM/EDS), density measurements using pycnometer and Archimedes' methods, microhardness and dry sliding wear tests were conducted on the sintered composites. The highest hardness (∼1.5 GPa) and the lowest wear rate (∼0.0012 mm3/Nm) were obtained in the Al-15 wt % (HfTiZrVNb)B2 sample.
KW - Al matrix composites
KW - High entropy diboride
KW - Mechanical alloying
KW - Mechanical analysis
KW - Microstructural characterization
KW - Sintering
UR - http://www.scopus.com/inward/record.url?scp=85192091361&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2024.04.386
DO - 10.1016/j.ceramint.2024.04.386
M3 - Article
AN - SCOPUS:85192091361
SN - 0272-8842
VL - 50
SP - 26583
EP - 26595
JO - Ceramics International
JF - Ceramics International
IS - 15
ER -