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通过在Co_(82)Zr_(18)合金中添加过渡族元素Cr的方法,利用快淬工艺,制备出了Co_(82-x)Zr_(18)Cr_x(x=0,2,3,4)快淬合金薄带,利用磁性测量、X光衍射、热磁分析、扫描电子显微镜,对其磁性能、相组成、微结构进行了研究,实验结果表明,在Co_(82)Zr_(18)合金中添加少量的Cr可以使其矫顽力(iHc)显著提高,其中,Co_(79)Zr_(18)Cr_3快淬薄带经600℃退火处理后iHc=6.5 kOe.相分析发现,600℃退火后的Co_(79)Zr_(18)Cr_3快淬薄带由单一Co_(11)Zr_2相组成,Cr原子进入到了Co_(11)Zr_2相的晶格之中替换了原子半径相对较小的Co原子,这导致了Co_(11)Zr_2居里温度(T_C)的降低却使其磁晶各向异性场(Ha)显著提高;另一方面,通过微结构研究发现,未退火的Co_(79)Zr_(18)Cr_3快淬薄带由50—80 nm的等轴晶粒组成,经600℃退火后,其晶粒形态并未发生改变然而晶粒尺寸却增长到400—500nm。
Co_ (82-x) Zr_ (18) Cr_x (x = 0, 2, 3, 4) was prepared by the rapid quenching process by adding Cr as transition element to Co_ (82) Zr_ (18) The results show that the magnetic properties, phase composition and microstructure of Co_ (82) Zr_ (18) alloy have been investigated by means of magnetic measurement, X-ray diffraction, thermal analysis and scanning electron microscopy The addition of a small amount of Cr can significantly increase the coercive force (iHc), of which the iHc value of 6.5 kOe after annealed at 600 ℃ for the Co 79 Zr 18 Cr 3 quenched ribbon shows that annealing at 600 ℃ The rapidly quenched Co_ (79) Zr_ (18) Cr_3 thin ribbons consist of a single Co_ (11) Zr_2 phase, and the Cr atoms enter into the lattice of Co_ (11) Zr_2 phase to replace the Co atoms with relatively small atomic radius , Which led to the decrease of the Curie temperature (T_C) of Co 11 Zr 2 Zr 2 O 2, but the magnetic anisotropy field (Ha) increased remarkably. On the other hand, (18) The quenched ribbon of Cr 3 is composed of 50-80 nm equiaxed grains. After annealing at 600 ℃, the grain shape does not change but the grain size increases to 400-500 nm.