Effect of Ni:Si ratio on microstructure and properties of powder metallurgical Corson alloy
| Autor: | Akkaş Mehmet, Hakan Atapek Ş., Polat Şeyda |
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| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Science of Sintering, Vol 55, Iss 4, Pp 425-436 (2023) |
| Druh dokumentu: | article |
| ISSN: | 0350-820X 1820-7413 |
| DOI: | 10.2298/SOS230329026A |
| Popis: | In this study, powder metallurgical Cu-Ni-Si alloys with different Ni:Si ratios are produced by cold pressing sintering (600 MPa, at 950°C for 60 min) and bulk materials are solution annealed at 950°C for 60 min, quenched in water and aged at 450°C for 60 min. A fine distribution of Ni-Si compounds embedded in a netted-free structure is formed in the matrix. Although a conductivity level of at least 22% IACS is achieved in all powder metallurgical alloys, the impurity effect is dominant and a decrease in the conductivity is detected by increasing Ni:Si ratio. However, a slight increase in electrical conductivity is achieved by the precipitation of nickel silicides in the α-Cu matrix under aging conditions. Increasing Ni:Si ratio directly increases the hardness of the powder metallurgical matrix, and a hardness value of 73 HV0.1 is obtained for the aged alloy having the highest Ni:Si (5:1) ratio. |
| Databáze: | Directory of Open Access Journals |
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