ニッケルー鉄合金めっき皮膜の熱膨脹特性

概要

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We investigated thermal expansion properties of Ni-Fe alloy electrodeposits, which are anticipated for use as low thermal expansion materials.Thick and crack-free Ni-Fe alloy electrodeposits with 25 to 58mass% Fe contents were obtained from sulfate/chloride electrolytes with additives, saccharin and malonic acid. The linear expansion coefficients of the electrodeposited Ni-Fe alloy pipes reduced with increasing Fe contents as melted alloys. For the Ni-58mass%Fe alloy electrodeposits, the linear expansion coefficient exhibited 8.6×10−6/ºC for the as-plated specimen and approximately 7×10−6/ºC for the alloys annealed above 350ºC.
2006-10-01