| CROSS-DISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
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Overcoming Decomposition with Order-Reversed Quenching Obtained by Flash Melting |
| SI Ping-Zhan**, XIAO Xiao-Fei, FENG He, YU Sen-Jiang, GE Hong-Liang |
Zhejiang Key Lab of Magnetic Materials, China Jiliang University, Hangzhou 310018
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| Cite this article: |
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SI Ping-Zhan, XIAO Xiao-Fei, FENG He et al 2013 Chin. Phys. Lett. 30 078101 |
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Abstract We report on an order-reversed quenching phenomenon in manganese nitrides under flash melting, which prevents the thermodynamically favorable phase transformations from occurring at high temperatures by providing a narrow window of time. The Mn-N kept un-decomposed at high temperatures generated by current up to 339 MA/m2 within 60 ms. After flash melting, the Mn-N shows a significantly enhanced coercivity and a decreased crystalline size. The Mn-N samples decompose rapidly at temperatures above 1100 K with time. The order-reversed quenching technique is potentially useful in processing and preventing phase transformations of meta-stable materials at high temperatures.
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Received: 12 March 2013
Published: 21 November 2013
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| PACS: |
81.40.Gh
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(Other heat and thermomechanical treatments)
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82.30.Lp
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(Decomposition reactions (pyrolysis, dissociation, and fragmentation))
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75.50.-y
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(Studies of specific magnetic materials)
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