Characteristics of Phase Transformation in Metallic Fine Particles (Martensitic transformation of Fe-Ni alloys, and ordering of CuAu and Cu3Au alloys)

Effects of particle size upon the martensitic transformation of Fe-Ni alloys and the ordering of CuAu and Cu3Au alloys were studied. The specimens were prepared by the reduction of fine powdered solid solution of (Fe, Ni) C2O4. 2H2O, (Fe, Ni)3O4 and (Cu, Au) CN in hydrogen at various temperatures. T...

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Bibliographic Details
Published in:Transactions of the Japan Institute of Metals 1964, Vol.5(3), pp.135-141
Main Author: Bando, Yoshichika
Format: Article
Language:English
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Summary:Effects of particle size upon the martensitic transformation of Fe-Ni alloys and the ordering of CuAu and Cu3Au alloys were studied. The specimens were prepared by the reduction of fine powdered solid solution of (Fe, Ni) C2O4. 2H2O, (Fe, Ni)3O4 and (Cu, Au) CN in hydrogen at various temperatures. The Ms temperature decreases with decreasing particle size, and the particles (27.4% Ni) less than 0.7 μ do not undergo martensitic transformation even at the liquid nitrogen temperature. The rates of ordering in CuAu and Cu3Au increase with decreasing particle size. These phenomena were discussed from the viewpoint of the behaviors of crystal imperfections in fine particles.
ISSN:0021-4434
2432-4701
DOI:10.2320/matertrans1960.5.135