Analysis of sintering curves, microstructure, and microhardness of the Cu-WC composite
| Author | Gomes, Uílame Umbelino; Marques, Anderson Costa; Silva, Thalita Queiroz e; Araújo, Kívia Fabiana Galvão; Lima, Maria José Santos; Vieira, Pâmala Samara; Lourenço, Cleber da Silva; Mashhadikarimi, Meysam | |
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| Publisher | Materials Research | |
| Date | 2025-09-26 | |
| Keywords | Sintering Sintering Curves Cu-WC Composites High-Energy Ball Milling | |
| Citation | ||
| Abstract | Composite materials have gained prominence due to their tailored properties for various applications. Cu-WC composites, combining a copper matrix with tungsten carbide reinforcement, are particularly valuable for electrical conductors and heat sinks. This study examined the sintering behavior of Cu-WC composite powder (10%WC) produced via High-Energy Ball Milling (HEBM) at 400 RPM for 2, 10, and 20 hours. The powders were compacted at 150 MPa and sintered at 900°C with a 1-hour isothermal hold. Sintering curves, microstructure, and Vickers microhardness were analyzed. The results showed that longer milling times led to significant powder expansion up to 750°C, followed by greater shrinkage due to diffusion mechanisms. Sintered samples milled for 10 hours displayed improved carbide distribution in the copper matrix. The highest microhardness was achieved at 20 hours of milling, attributed to refined microstructure. Extended milling times enhanced atomic diffusion during sintering, resulting in a more homogeneous structure and increased hardness | |
| URI | https://repositorio.ufrn.br/handle/123456789/66122 | |
| Collections | CT - DEM - Artigos publicados em periódicos |
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