The lattice constants of Sm-Co permanent magnet alloy have been determined by means of X-ray diffraction measurement. The lattice constants of R-Co alloy systems (R = rare earth) have been investigated with Bragg-will...The lattice constants of Sm-Co permanent magnet alloy have been determined by means of X-ray diffraction measurement. The lattice constants of R-Co alloy systems (R = rare earth) have been investigated with Bragg-williams (B-W) approximation and their expressions are given. It is pointed out that the lattice constants of RCo5 phase depend only on the alloy composition, and that the lattice constants of R2Co17 phase are related to the order parameter as well as the alloy composition. In this paper the relationship between the lattice constants of RCo5 and those of R2Co17 is discussed, and the values calculated by the expressions are compared with experimentally determined for Sm-Co alloys.展开更多
文摘The lattice constants of Sm-Co permanent magnet alloy have been determined by means of X-ray diffraction measurement. The lattice constants of R-Co alloy systems (R = rare earth) have been investigated with Bragg-williams (B-W) approximation and their expressions are given. It is pointed out that the lattice constants of RCo5 phase depend only on the alloy composition, and that the lattice constants of R2Co17 phase are related to the order parameter as well as the alloy composition. In this paper the relationship between the lattice constants of RCo5 and those of R2Co17 is discussed, and the values calculated by the expressions are compared with experimentally determined for Sm-Co alloys.
