Structural, Magnetic, and Functional Behaviors of Polymerbonded NiCoMnIn Ferromagnetic Shape Memory

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Structural, Magnetic, and Functional Behaviors of
Polymer-bonded Ni-Co-Mn-In Ferromagnetic Shape
Memory Composites
Annual Sigma Xi Student Competition, April 16,
2009

• D. M. Liu1,2, Z. H. Nie2, Y. Ren3, J. Pearson4,
• P. K. Liaw1, Y. D. Wang2

1 Department of Materials Science and
Engineering, The University of Tennessee,
Knoxville, TN 37996, USA 2 Key Laboratory for
Anisotropy and Texture of Materials (Ministry of
Education), Northeastern University, Shenyang
110004, China 3 X-ray Science Division, Argonne
National Laboratory, Argonne, IL 60439, USA 4
Materials Science Division, Argonne National
Laboratory, Argonne, IL 60439, USA
2
ACKNOWLEDGES

• This work is supported by the National Science
  Foundation Integrative Graduate Education and
  Research Training (IGERT) Program, and the
  International Materials Institutes (IMI) Program.
• This work is supported by the National Natural
  Science Foundation of China (Grant Nos. 50725102
  and 50531020) and the Ministry of Education of
  China with the Specialized Research Fund for the
  Doctoral Program of High Education.
• Use of the Advanced Photon Source was supported
  by the U.S. Department of Energy, Office of
  Science, Office of Basic Energy Science, under
  Contract No. DE-AC02-06CH11357.

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OUTLINES

• Excellence Disadvantages of Ferromagnetic Shape
  Memory Alloys (FSMAs) Ni2MnGa Ni-Co-Mn-In
• Motivation of Preparing Ferromagnetic
  Ni-Co-Mn-In-Polymer (NCMI-P) Composite
• Fabrication and Micrograph of NCMI-P Composite
• Magnetic Properties of NCMI-P Composite
• Synchrotron Studies of NCMI-P Composite with
  Temperature, Stress, Magnetic Field
• Conclusions

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Critical Scientific Issue

• Excellent Functional Performance

• Disadvantage in Practical Application

Polycrystalline Brittle, low MFIS Single
Crystal High Cost
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MOTIVATION
Composite
N. Scheerbaum, D. Hinz, et.al., Acta Mater. 55,
2707 (2007). J. Feuchtwanger, Ph.D. thesis,
Massachusetts Institute of Technology, Cambridge,
2005.
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Fabrication of Polymer-bonded Ni-Co-Mn-In
Composite with Magnetic Field
Final Volume Ratio11
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Microstructures of NiCoMnIn-Polymer Composite
Optical Microstructure
EBSD Mapping
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Magnetic Properties of NiCoMnIn Composite
?M(5T) 35 emu/g ?M(0.05T)
2.5 emu/g
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In-situ Synchrotron X-ray Study of Martensite
transition During Cooling With/Without Magnetic
Field
0 T
5 T
P(220)
M(127)
Temperature (K)
2? (?)
2? (?)
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In-situ Synchrotron X-ray Study of Martensite
transition During Cooling With/Without Magnetic
Field
Area Ratio
5 T Parent Martensite phase coexist at low
temperature
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In-situ Uniaxial Compression Experiments Using
High-energy X-ray
(040)M
Stress 8 MPa
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Different martensite variants grow in the
different orientation!
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Compression-induced Textured Martensite
360
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Macrostrain ()
Average Volume of Martensite ()
70 MPa
Stress (MPa)
?
Volume of Martensite was evaluated from the
relative integral intensity of martensitic peak
(040)
Remained macrostrain er3.88
?
After unloading
Remained Vm16.3
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In-situ Synchrotron X-ray Study of Reverse
Martensite Transition under a Magnetic Field
Experiment
Line fitting
Vm -2.91063H 24.73432
Volume of Martensite,
Magnetic field, H(T)
M 6.5 T ?Vm 20
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Magnetic-field-induced Strain Recovery Through
Reverse Martensite Transition
Recovery strain 1.75
Volume of Martensite ()
Residual Strain ()
Magnetic field, H (T)
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Conclusion

• Point 1
• The magnetic field blocked the martensite
  transformation within Ni45Co5Mn36.6In13.4-polymer
  composite, caused the parent and martensite
  coexist even at very low temperature.
• Point 2
• The Ni45Co5Mn36.6In13.4-polymer composite
  showed a stress-induced
• martensitic phase-transformation during a
  uniaxial compressive
• deformation with high ductility.
• Point 3
• A residual strain of 3.88 remained after
  unloading. A magnetic-field-
• induced strain recovery of ?2 was observed
  in this pre-strained
• composite. This is attributed to the
  magnetic-field-induced reverse
• martensitic transformation.
• Point 4
• The large magnetic-field-induced strain,
  together with good ductility
• and low cost, make the Ni-Co-Mn-In
  composites potential candidates for
• practical magnetic actuators.

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Thank you very much! I appreciate your
suggestions and comments!