Metal treatment – Process of modifying or maintaining internal physical... – Heating or cooling of solid metal
Reexamination Certificate
2003-07-03
2009-06-16
Sheehan, John P. (Department: 1793)
Metal treatment
Process of modifying or maintaining internal physical...
Heating or cooling of solid metal
C148S100000, C148S121000
Reexamination Certificate
active
07547367
ABSTRACT:
The invention relates to a method for producing magnetically active shape memory metal alloy, said metal alloy containing nickel, manganese and gallium. In the method, the different components of the metal alloy are melted, and the melt is homogenized essentially at the melting temperature; the obtained metal alloy is cast, and the cast metal alloy is subjected to directional solidification at 10-100° C. below the liquidus temperature of said metal alloy.
REFERENCES:
patent: 6475261 (2002-11-01), Matsumoto et al.
ASM Handbook, Formerly Ninth Edition, Metals Handbook, vol. 15, Casting, 1988, pp. 319 to 323.
A Dictionary of Metallurgy, by A.D. Merriman, 1958, p. 30.
Scripta Materialia, vol. 48, 2003, G. Mogylnyy et al, “Crystal Structure and Twinning in Martensite of Ni1.96 Mn1.18Ga0.86 Magnetic Shape Memory Alloy,” available online at www.sciencedirect.com, pp. 1427-1432.
Journal of Alloys and Compounds, vol. 312, 2000, D.L. Schlagel et al, “Chemical Segregation During Bulk Single Crystal Preparation of Ni-Mn-Ga Ferromagnetic Shape Memory Alloys,” available online at www.sciencedirect.com, pp. 77-85.
Scripta Materialia, vol. 36, No. 10, 1997, K. Ullakko et al, “Magnetically Controlled Shape Memory Effect in Ni2MnGa Intermetallics,” available online at www.sciencedirect.com, pp. 1133-1138.
Järvi Juha
Suortti Tuija
Taskinen Pekka
Outotec Oyj
Sheehan John P.
Smith-Hill & Bedell, P.C.
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