Characterization of cementite films prepared by electron-shower-assisted PVD method

S. J. Li, M. Ishihara, H. Yumoto, T. Aizawa, M. Shimotomai

研究成果: Article査読

41 被引用数 (Scopus)

抄録

It is important to understand the mechanical properties of single phase cementite in order to design the microstructure of advanced steels. Several papers have been published on mechanical properties of cementite embedded in steels or extracted from steels by electrolysis. However, single phase cementite is not documented. The purpose of this study is to prepare cementite films by the PVD method and to characterize their properties. We applied the electron-shower-assisted PVD method in order to produce a single phase cementite film (2.5 μm in thickness) in a C2H2 atmosphere at 523 K. The composition of the film was determined to be 70Fe-28C-2O (at.%). ESCA spectra indicated that the film was not contaminated with other metallic elements. The grain size of the film was revealed to be about 50 nm by AFM. The Vickers hardness was 1230 (under a load of 2.5 g) at room temperature, nearly equal to the value of 1270 of the cementite extracted from carbon steel by electrolysis. Temperature dependence of the hardness was measured up to 673 K. Young's modulus and Poisson's ratio at room temperature were 160 GPa and 0.26, respectively.

本文言語English
ページ(範囲)100-104
ページ数5
ジャーナルThin Solid Films
316
1-2
DOI
出版ステータスPublished - 1998 3 21

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 表面および界面
  • 表面、皮膜および薄膜
  • 金属および合金
  • 材料化学

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