MnAl ALLOY AND MANUFACTURING METHOD THEREFOR
AssigneeTDK Corporation
InventorSuguru Satoh
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Abstract
A MnAl alloy according to the present invention exhibits metamagnetism and has crystal grains containing a τ-MnAl phase and crystal grains containing a γ2-MnAl phase and a β-MnAl phase. When the ratio of the τ-MnAl phase is A, 75%≤A≤99% is preferably satisfied, and when the ratios of the γ2-MnAl phase and β-MnAl phase are B and C, respectively, B<C is preferably satisfied. Thus, it is possible to obtain metamagnetism over a wide temperature range, particularly, over a temperature range of −100° C. to 200° C. and to enhance saturation magnetization.
Claims6
A MnAl alloy exhibiting metamagnetism comprising crystal grains including τ-MnAl phase and crystal grains including γ2-MnAl phase and β-MnAl phase.
A method for manufacturing a MnAl alloy, the method comprising:
- a step of depositing a MnAl alloy by electrolyzing molten salt containing a Mn compound and an Al compound at a temperature of 350° C. or more and 450° C. or less;
- and
- a step of applying heat treatment to the MnAl alloy at a temperature of 400° C. or more and less than 600° C.
Dependencies are inferred from the claim text.