铁镍基非晶态合金的热稳定性和结晶特性

铁镍基非晶态合金的热稳定性和结晶特性 AN INVESTIGATION ON THE THERMAL STABILITY AND CRYSTALLIZATION CHARACTERISTICS OF TWO GLASSY ALLOYS OF Fe-Ni BASE 黄胜涛 Huang Shentao Tang Chenghuan first-author 唐承欢 本文利用X射线衍射法,及示差热分析法研究了Fe 38 Ni 39 P 14 B 6 Al 3 及Fe 65 Ni 16 Si 7 B 13 两种软磁非晶态合金的温度稳定性及结晶特性。发现前者和后者的起始结晶温度分别为385℃及395℃。这两种非晶合金向晶态转变时最早形成的相都具有体心立方结构,是铁的固溶体;两合金各有另一结晶相（Fe,Ni） 3 （P,B）及（F e ,Ni） 3 B是异所同构物,两合金在非晶态下退火都发生放热反应,这是非晶态下原子重排的结果。它们在升温时的结构转变大致都经历了非晶态Ⅰ→非晶态Ⅱ→亚稳晶态→稳定晶态四个阶段。 An investigation on the thermal stability and crystallization characteristics of glassy alloys Fe 38 Ni 39 P 14 B 6 Al 3 and Fe 65 Ni 16 Si 7 B 13 was carried out by means of X-ray diffraction analysis and differential thermal analysis. The starting points of crystallization were found to be 385℃ and 395℃ respectively. The initial phases formed in the transformation from amorphous state to crystalline state for both alloys were solid solutions of iron with bcc structure and the second phases were（Fe, Ni） 3 （P, B） and（Fe, Ni） 3 B respectively, being of body-centred-tetragonal structure. Exothermal reactions were observed for both alloys when annealed at their amorphous states; these exothermal reactions were thought as a result of atomic rearrangement in the amorphous state. The experimental results showed that in the course of raising temperature, both alloys underwent a four-stage change: amorphous state Ⅰ--amorphous state Ⅱ--metastable crystalline state—stable crystalline state. 1981-01-01 2021-04-01 1