电镀镍铁合金的穆斯堡尔谱学研究

电镀多层镍铁合金工艺是七十年代的新工艺,它用价廉的铁代替部分镍,而且合金镀层具有一系列优良的性能.在应用穆斯堡尔谱学方法研究镍铁合金方面,从Johnson等人的工作开始,陆续出现一些有关因瓦(Invar)型镍铁合金和NiFe,Ni_3Fe的研究论文,然而他们的研究皆不是电镀产生的镍铁合金,而文献2]所研究的只是一种Ni75成份的电镀镍铁合金.

Mossbauer Spectroscopic Study of Electrodeposited Iron-Nickel Alloys

The electrodeposited iron-nickel alloys with composition ranging from 10 to 27 at% Fe were investigated by means of Mossbauer spectroscopy etc. Distribution of the hyperfine field in these f. c. c. iron-nickel alloys was determined from the observed Mossbauer spectra. The relation between the widths of the outer and the inner lines was discussed. The intensity ratios of six lines were not equal to 3:2:1:1:2:3 since the ferromagnetic domain distribution in the samples was not random. The influence of the distribution of the electrical field in the bath was discussed. The great change in intensities of the second and the fifth lines for samples with same composition was observed. This is due to the fact that the plating layers were located at distinct positions in electrical field during the electrodeposited process. No iron oxide appears in these iron-nickel alloys which were placed in a chemical laboratory and exposed in air for 33 months. This indicates that the electrodeposited iron-nickel alloys have a high ability of corrosion resisting.