Relationship between pore coarsening and mass loss during supersolidus liquid phase sintering of alpha brass |
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Authors: | Abbas Sabahi Namini Maziyar Azadbeh Ahad Mohammadzadeh Herbert Danninger Shirin Rezapasand |
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Affiliation: | 1. Department of Engineering Sciences, Faculty of Advanced Technologies, University of Mohaghegh Ardabili, Namin, Iran;2. Department of Engineering Sciences, Faculty of Advanced Technologies, Sabalan University of Advanced Technologies (SUAT), Namin, Iranabbas.sabahi64@yahoo.com sabahi@uma.ac.ir;4. Faculty of Materials Engineering, Sahand University of Technology, Tabriz, Iran;5. Department of Materials Engineering, Faculty of Engineering, University of Maragheh, Maragheh, Iran https://orcid.org/0000-0002-5062-2938;6. Institute of Chemical Technologies and Analytics, Technische Universit?t Wien, Wien/Vienna, Austria |
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Abstract: | ABSTRACTThe effect of sintering variables on the zinc loss during sintering of brass was investigated. Zinc loss, evident through mass change, starts during heating of the powder at approximately 700°C. By supersolidus liquid phase sintering of the cold-pressed brass powder, the maximum amount of zinc loss occurred at lower temperatures and prolonged sintering times. At higher temperatures, especially near the zinc boiling point, the rate of zinc loss from the surface is surprisingly moderate since closing of the pores causes zinc to be trapped in the samples. At lower temperatures, in contrast, when the pores in the surface are open and there is also a lower volume fraction of liquid phase, zinc can easily escape from the samples. Generally, it was thus concluded that during sintering, zinc loss depends more strongly on the pore connectivity and the specific surface than just on the nominal vapour pressure. |
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Keywords: | Alpha brass zinc loss modelling thermal analysis X-ray radiography |
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