電析クロムの水素吸臓に関するX線的研究

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概要

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• The effects of cathodic charging of hydrogen in the solution of 1N-Na2S04 were investigated by ray diffraction technique on the crystal structure, macro stress and micro strains in electrodeposited chromium obtained from chromic acid bath. The results obtained are summarized as follows ; (1) It is found that electrodeposited b. c. c. chromium is partially transformed into h. c. p. type chromium hydride by hydrogen charged under the conditions of bath temperature range of 30 to C, current densities of 1 to 10A/dm^2 and longer charging time. (2) The lattice parameters on both (211) and (222) planes of electrodeposited b. c. c. chromium increase and the tensile stress on (211) plane measured by Sin^2ψ method decrease with charging time. Further charging change the sign of macro stress but holding at room temperature reduce the effect the charging on the macro stress. This behavior of macro stress under holding may be explained the diffusion of hydrogen from matrix to surfaces, causing the expanded lattice to contract. (3) The half-value breadths on both (211) and (222) planes of electrodeposited b. c. c. chromium increase with charging time. The increase in the diffraction line broadening was found as being caused by the fragmentation of crystals not so much by micro strains. However, Iarge micro strains were measured in the transformed h. c. p. type chromium hydride. (4) It is found that the effect of hydrogen charging on electrodeposited h. c. p. and f. c. c. type chromium hydride is not remarkable as it is detected by the line broadening as compared with the case of b. c. c. chromium.

• 社団法人日本材料学会の論文
• 1969-12-15

著者

• 坂本 芳一

  京都大学工学部

関連論文

• X線回折による電解析出クロムの内部応力の測定
• 電析クロムの水素吸臓に関するX線的研究
• 電解析出クロムのX線回折線プロフィルの解析
• 電解析出クロムの微視的ひずみと干渉性有効回折範囲の大きさに関するX線的研究
• X線回折線プロフィルの解析による干渉性有効回折範囲の大きさと微視的ひずみの分離

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