非晶态合金的退火效应

Annealing Behavior of Amorphous Alloys

通过分析非晶态Ｆｅ７９Ｂ１６Ｓｉ５的弯曲断裂相对应变εｆ、居里温度Ｔｃ、饱和磁感应强度Ｂｓ、矫顽力Ｈｃ和损耗Ｐ在退火过程中的变化，研究了非晶态合金的延－脆转变、居里温度的弛豫及磁性优化效应。非晶态Ｆｅ７９Ｂ１６Ｓｉ５在５０３Ｋ时开始发生延－脆转变，εｆ分别在５０３Ｋ和５７３Ｋ时出现两次转折。退火后，Ｆｅ７９Ｂ１６Ｓｉ５合金的Ｔｃ升高１９Ｋ，Ｂｓ提高７２％，Ｈｃ和Ｐ（０．３Ｔ／１０ｋＨｚ）分别减小为淬态时的１／７和１／６。

The ductile-brittle transition, the relaxation of Curie temperature and the improvementof magnetic properties of amorphous alloy have been studied .by analyzing the changes of relative fracture strain in bending f Curie temperature Tc, saturation induction Bs, coercive force Hc and powerloss P of amorphous Fe79B16Si5 during the annealing process.In isochronal annealing, the ductile-brittletransition of amorphous Fe79B16Si5 begins at 503K, and the ductility of the amorphous ribbons drops at503K and 573K, respectively. After annealing, the Curie temperature To is increased by 19K. saturation induction is increased by 72%, coercive force and power loss are reduced to 1/7 and 1/6, respectively,compared to those values of the as-cast alloy.