電解析出クロムのX線回折線プロフィルの解析
1969 年 18 巻 194 号 p. 997-1003
詳細
1969 年 18 巻 194 号 p. 997-1003
In the previous papers it was found that the macro stress, the micro strain and the coherently diffracting domain size in chromium, electrodeposited from chromic acid plating bath, depended strongly on the plating bath temperature.
In the experiment reported in the present paper, it was intended to study the method how to separate simultaneously the macro stress, the micro strain and the domain size in electrodeposited chromium obtained at various bath temperatures by using the Fourier series method suggested by Schmidt. The X-ray diffraction line profiles measured by the Sin2ψ method were expanded to the Fourier series. From the phase angles of the complex Fourier coefficients, the macro stress were obtained and at the same time the micro strain and the domain size were obtained by the Fourier cosine coefficients. The experimental results obtained are summarized as follows.
(1) The simultaneous separation of the macro stress, the micro strain and the domain size in the electrodeposited chromium, is confirmed to be possible by the Fourier series method.
(2) It is found that the value of macro stress obtained by the Fourier series method have good agreement with those obtained by the three points parabola fitting method within the experimental errors, and no marked difference has been recognized in the value of the macro stress, when the diffraction line profiles at various angles ψ are corrected to remove the defocussing and absorption effects by the convolution method.
The macro stresses in the electrodeposited chromium measured by the Fourier series method on the (211) diffraction line profiles of CrKα radiation are tensile in the bath temperature range of 40 to 65°C, and the stresses have decreased with increasing bath temperature and above 70°C, the stresses are compressive.
(3) It is found that the r.m.s strains obtained from the (211) reflection of ψ=0°decrease with increasing bath temperature in the range of 40 to 70°C, and again increase at 75°C. The domain size are found to increase with increasing bath temperature in the range of 40 to 70°C, and again. decrease at 75°C.
