MnAl ALLOY
US-2020002790-A1 · Jan 2, 2020 · US
MnAl alloy and manufacturing method therefor
US11293085B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11293085-B2 |
| Application number | US-201916452872-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 26, 2019 |
| Priority date | Jun 30, 2018 |
| Publication date | Apr 5, 2022 |
| Grant date | Apr 5, 2022 |
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Abstract
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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.
First claim
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What is claimed is: 1. A material, comprising: an MnAl alloy that is deposited 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 that is heat-treated at a temperature of 400° C. or more and less than 600° C., such that the deposited and heat-treated MnAl alloy comprises crystal grains including τ-MnAl phase and crystal grains including γ2-MnAl phase and β-MnAl phase and exhibits metamagnetism. 2. The material as claimed in claim 1 , wherein 75%≤A≤99% is satisfied when a ratio of the τ-MnAl phase is A. 3. The material as claimed in claim 2 , wherein 95%≤A≤99% is satisfied. 4. The material as claimed in claim 2 , wherein B<C is satisfied when ratios of the γ2-MnAl phase and β-MnAl phase are B and C, respectively. 5. The material as claimed in claim 4 , wherein 0.01≤B/C≤0.17 is satisfied. 6. 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., such that the deposited and heat-treated MnAl alloy comprises crystal grains including τ-MnAl phase and crystal grains including γ2-MnAl phase and β-MnAl phase and exhibits metamagnetism.
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- What does patent US11293085B2 cover?
- 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 …
- Who is the assignee on this patent?
- Tdk Corp
- What technology area does this patent fall under?
- Primary CPC classification C22F1/18. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Apr 05 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).