This study investigated the hydrogen permeation property of cementite by fabricating bulk cementite sample using the process combining the mechanical ball milling and subsequent pulse current sintering. The bulk cementite sample having a 96 vol% of cementite was successfully fabricated. The prepared bulk cementite showed no signal of hydrogen permeation during the 3.5 day of electrochemical hydrogen permeation test. The morphology of blister formed in the sample indicated that diffusion coefficient of hydrogen in cementite is very small.

中文翻译：

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块状渗碳体的透氢性能

本研究采用机械球磨和脉冲电流烧结相结合的工艺制备块状渗碳体样品，研究渗碳体的透氢性能。成功地制备了具有 96 体积％渗碳体的块状渗碳体样品。制备的块状渗碳体在 3.5 天的电化学氢渗透测试中没有显示氢渗透信号。样品中形成的气泡形态表明渗碳体中氢的扩散系数很小。