Microstructural features and hardness of Al2O3-Cu composites obtained by high-energy ball milling and spark plasma sintering Full article
| Journal |
Materials Letters
ISSN: 0167-577X |
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| Output data | Year: 2026, Article number : 141608, Pages count : 5 DOI: 10.1016/j.matlet.2026.141608 | ||||
| Tags | Copper, Alumina, Spark plasma sintering, High-energy ball milling, Composite, Hardness | ||||
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Abstract:
The present work was aimed to demonstrate the potential of high-energy ball milling (HEBM) combined with spark plasma sintering (SPS) to fabricate 50 vol% Al2O3–Cu composites with enhanced mechanical performance. After HEBM of the Al2O3-Cu mixture for only 10 min, the particle size of alumina decreased from 10-40 μm to <5 μm. The HEBM powder agglomerates featured uniform distribution of the phases. Nearly fully dense composites were obtained by SPS of the HEBM mixture at 950 ◦C for 20 min. In the composites sintered from the HEBM mixture, the densification was accompanied by the formation of thin Cu-rich layers between the Al2O3-Cu agglomerates. The structural refinement induced by HEBM allowed obtaining composites with a hardness of 300 HV, which is five times the hardness of unreinforced copper.
Cite:
Dudina D.V.
, Esikov M.A.
, Bokhonov B.B.
, Batraev I.S.
, Shutov A.V.
Microstructural features and hardness of Al2O3-Cu composites obtained by high-energy ball milling and spark plasma sintering
Materials Letters. 2026. 141608 :1-5. DOI: 10.1016/j.matlet.2026.141608 WOS Scopus OpenAlex
Microstructural features and hardness of Al2O3-Cu composites obtained by high-energy ball milling and spark plasma sintering
Materials Letters. 2026. 141608 :1-5. DOI: 10.1016/j.matlet.2026.141608 WOS Scopus OpenAlex
Dates:
| Submitted: | Aug 31, 2026 |
| Accepted: | Sep 7, 2026 |
| Published online: | Sep 9, 2026 |
Identifiers:
| ≡ Web of science: | WOS:001875448900001 |
| ≡ Scopus: | 2-s2.0-105050237867 |
| ≡ OpenAlex: | W7212033881 |