12305-97-4Relevant articles and documents
Directional solidification and characterization of binary Fe-Pr and Fe-Nd eutectic alloys
Santos,Coelho,Araújo,Ribeiro,Gama
, p. 194 - 200 (2001)
In this work, the directional solidification technique was employed in binary Fe-Pr and Fe-Nd eutectic alloys with compositions near to their respective eutectic points. Solidifying the Fe-Pr and Fe-Nd hypereutectic alloys in a vertical Bridgman crystal growth unit, we were able to obtain the two eutectic morphologies, one globular and other feathered, normally observed in as-cast samples, in a coarser form and sequentially displayed along the length of the samples. The transition temperatures nearby to the eutectic points were also determined using a Calvet type calorimeter. The phases comprising the globular and feathered morphologies were determined as being, respectively, Fe17R2 and Fe2R (R = Pr or Nd), for both systems. These experiments also showed very clearly the peritectic formation of the Fe2R phases from the Fe17R2 and the liquids. Thermomagnetic measurements gave the Curie temperature as being 44°C for the Fe2Pr phase and 252°C for the Fe2Nd phase.
Structure and magnetostriction of Ho 1 -xPrx Fe 1.9 alloys
Shi,Zhai,Wang,Fan,Shi,Tang,Du
, p. 1627 - 1630 (2012/03/07)
Polycrystalline Ho1-xPrxFe1.9 (0≤x≤1) cubic Laves alloys were synthesized by arc-melting and subsequent annealing under high stress. Their structure, magnetic properties and magnetostriction are investigated using X-ray diffraction, vibrating sample magnetometer and standard strain gauge technique, respectively. It was found that Ho1-xPrxFe1.9 single cubic Laves phase cannot be obtained when x>0.2 by a traditional vacuum annealing method. In contrast, the cubic Laves phase can be stabilized over the whole studies range in the samples annealed under high stress. The saturation magnetization for Ho1-xPrxFe1.9 decreases with the increase of x and reaches a minimum at x=0.4, then increases with further increase of x, which indicates the antiparallel magnetic moment alignment between Ho and Pr sublattice. The magnetostriction of Ho1-xPrx Fe1.9 does not linearly increase with increasing x, but presents a minimum at x=0.4.
Composition anisotropy compensation and magnetostriction in Pr(Fe 1-xCox)1.9 (0≤x≤0.5) cubic Laves alloys
Shi,Tang,Zhai,Huang,Wang,Yu,Du
, (2009/02/03)
Polycrystalline magnetostrictive alloys Pr(Fe1-xCo x)1.9 (0≤x≤0.5) with cubic Laves phase were synthesized by high-pressure annealing. Measurements of Curie temperature, easy magnetic direction (EMD), and magnetostriction were made on these alloys. The EMD of the alloys rotates continuously from 〈111〉 for x=0.0 to 〈110〉 for x=0.3 and then shows a tendency to 〈111〉 with further increasing x. Two magnetostriction peaks at low fields are observed around x=0.2 and x=0.4 due to the lower anisotropy of these two alloys, which is consistent with the variation of EMD. This work demonstrates that the composition anisotropy compensation can be realized in Pr(Fe 1-xCox)1.9 system.
