Evaluation of the hardness and Young's modulus of electrodeposited Al-W alloy films by nano-indentation

SURFACE & COATINGS TECHNOLOGY

卷:325

Article

Higashino, Shota¹  Miyake, Masao¹  Takahashi, Ayumu¹  Matamura, Yuya¹  Fujii, Hisashi¹  Kasada, Ryuta²  Hirato, Tetsuji¹ 

[1] Kyoto Univ, Grad Sch Energy Sci, Sakyo Ku, Yoshida Honmachi, Kyoto 6068501, Japan

[2] Kyoto Univ, Inst Adv Energy, Uji, Kyoto 6110011, Japan

关键词: Electroplating;    Ionic liquid;    Nano-indentation;    Amorphous alloy;    Aluminum;    Tungsten;   

DOI  :  10.1016/j.surfcoat.2017.06.064

来源: Elsevier

【 摘 要 】

Al-W alloy films with various W contents up to similar to 12 at.% were prepared by electrodeposition using 1-ethyl-3-methylimidazolium chloride (EMIC)-AlCl3 ionic liquids with different concentrations of W precursor, W6Cl12. The hardness (H) and Young's modulus (E) of the films were examined by nano-indentation. The films were composed of a single-phase fcc Al super-saturated solid solution, an amorphous phase, or both, depending on the W content and the deposition conditions. The H value increased with increasing W content up to 9.8 at.% and then decreased slightly with further increases in the W content up to 12.4 at.%. A similar trend was observed in the E value with increasing W content, but the decrease in E value at 12.4 at.% W was more significant than that in H value. The changes in the H and E values are discussed from the viewpoints of the grain size and the constituent phases. The 9.8-12.4 at% W films, which had relatively high H values and H/E ratios, are expected to have a higher resistance to mechanical damage than Al films. (c) 2017 Published by Elsevier B.V.

【 授权许可】

Free