J Mater Sci Technol ›› 1998, Vol. 14 ›› Issue (4): 327-330.

• Articles • Previous Articles     Next Articles

Microstructure of Differently Annealed NanocrystallineFe_(72.7)Cu_1Nb_(1.8)Mo_2Si_(13)B_(9.5) Alloy

YanZhong ZHANG and Huijuan JIN (Shanghai Key Lab. of Metallic Functional Materials, Shanghai Iron and Steel Research Institute,Shanghai 200940, China)   

  • Received:1998-07-28 Revised:1998-07-28 Online:1998-07-28 Published:2009-10-10

Abstract: The microstructure of differently annealed nanocrystalline Fe72.7Cu1Nb1.8Mo2Si13B9.5 alloy was investigated by using Mssbauer spectroscopy and transmission electron microscope. The specimens were isochronally annealed at temperatures between 480℃ and 600℃ for 0.5 h. The experimental results show that the microstructure mainly consists of the nanoscale bcc α-Fe(Si) grains and the residual amorphous matrix phase. A trace paramagnetic phase was found for annealing about above 500℃. The volume fraction of cr-Fe(Si) grain increases with increasing annealing temperature, whereas the average size of grain is almost unchanged above 480℃ up to 580℃. The calculated thickness of the intergranular layer of the residual amorphous matrix clearly decreases with increasing annealing temperature.