Spark Plasma Sintered Mn-Al (Magnets) Production and Characterization with Experimental Design

Autor: Can Burak Danisman, Gultekin Goller
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Archives of Metallurgy and Materials, Vol vol. 68, Iss No 4, Pp 1357-1367 (2023)
Druh dokumentu: article
ISSN: 2300-1909
DOI: 10.24425/amm.2023.146201
Popis: Mn-Al alloys are important alloys due to their magnetic properties and have been identified as permanent magnets. This alloy possesses magnetic properties and can be manufactured at a relatively low cost. Mn-Al alloys could be an alternative to rare earth magnets and hard ferrites and have a promising future. In this study, the effects of sintering temperature, holding time and pressure on densification, average grain size and magnetic properties of the SPS-ed Mn-Al alloys were observed. However, with the different sintering parameters, the magnetic phase τ phase could be achieved. To obtain the τ phase, different annealing methods were tried, yet samples heated to 650°C and air cooled exhibited magnetic properties. This sample was selected from various sintering parameters due to its high density of 99% N6 (800°C – 300 sec – 60 MPa) and has an average grain size of 137±18.1 µm. The uniqueness of this work is that statistical approaches such as Taguchi design of experiment (DOE) and regression were used for optimization of the manufacturing process.
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