Abstract
The phase diagram of the Al–Cu–Si ternary system was investigated experimentally at the temperatures 600 °C and 800 °C. The current study was designed to contribute to a better understanding of the ternary phase diagram Al–Cu–Si at elevated temperatures, where some of the phase equilibria were only tentatively known. It was found that the ternary phase τ proposed earlier is actually an extended solid solution of Al in the CuSi_δ phase. At 700 °C, the phase CuSi_δ is stable as a pseudo ternary phase, and the existence of a significantly extended thermal stability range in the ternary was also confirmed by DSC measurements. In agreement with previous isothermal sections at other temperatures, a huge solubility of aluminum in CuSi_κ and negligible solubility of Si in AlCu_β was observed.
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Acknowledgements
This study was supported by the Austrian Science Fund (FWF) under the Lise-Meitner project M2293-N34.
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OZ involved in investigation, resources, writing—original draft, visualization, project administration, funding acquisition. AK involved in methodology, writing—review and editing. KR involved in methodology, validation, writing—review and editing, supervision.
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Zobac, O., Kroupa, A. & Richter, K.W. Experimental isothermal sections of the ternary phase diagram Al–Cu–Si at 600 °C and 800 °C. J Mater Sci 55, 15322–15333 (2020). https://doi.org/10.1007/s10853-020-05077-5
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DOI: https://doi.org/10.1007/s10853-020-05077-5