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The effect of Fe on microstructure and magnetic thermal performance of LaFe_(11.6*x)Si_(1.4) alloys were studied by X-ray diffraction(XRD),scanning electron microscopy(SEM),energy dispersive spectroscopy(EDS),and vibrating-sample magnetometer(VSM),respectively.The results showed that the excess Fe would make the 1:13 phase reduce in proportion and the easy corrosion phase LaFeSi phase disappear in LaFe_(11.6*x)Si_(1.4) alloys.The LaFe_(11.6*x)Si_(1.4) alloys kept the first order magnetic phase transition,and the maximum isothermal magnetic entropy changed and the relative cooling power reached the maximum in LaFe_(11.6*x)Si_(1.4) alloys with x=1.05 and 1.1,respectively.
The effect of Fe on microstructure and magnetic thermal performance of LaFe_ (11.6 * x) Si 1.4 (1.4) alloys were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) The results showed that the excess Fe would make the 1:13 phase reduce in proportion and the easy corrosion phase LaFeSi phase disappear in LaFe_ (11.6 * x) Si_ (1.4) alloys.The LaFe_ (11.6 (1.4) alloys kept in the first order magnetic phase transition, and the maximum isothermal magnetic entropy changed and the relative cooling power reached the maximum in LaFe - (11.6 * x) Si 1.4 alloys with x = 1.05 and 1.1, respectively.