Open AccessMagnetic-field-induced strains in polycrystalline Mn1-xCux(0.1≤x≤0.3) alloys
Author(s) -
彭文屹,
覃金,
章爱生,
严明明
Publication year - 2010
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.59.8244
Subject(s) - materials science , crystallite , homogenization (climate) , diffusionless transformation , condensed matter physics , martensite , volume fraction , magnetic field , metallurgy , composite material , microstructure , physics , quantum mechanics , biodiversity , ecology , biology
Magnetic-field-induced strain(MFISs) in polycrystalline Mn1-xCux(0.1≤x≤0.3, atomic fraction) alloys are studied by means of X-ray, photomicrograph, DSC, resistance strain gauge method at room temperature. The results show that Mn1-xCux alloys consist of fcc (γ) and fct (γ’) phases after a long period of homogenization because of fcc(γ)→fct(γ’) martensitic transformation in the cooling process. The volume proportion of γ’ phase increases with the increase of Mn content, so that the samples possess much better MFIS performance. At room temperature, the MFIS in Mn0.9Cu0.1 sample reaches 91 ppm in 0.9 T magnetic field.