鷲津仁志教授らのグループがトライボロジーオンライン論文賞を受賞

2015年度日本トライボロジー学会トライボロジーオンライン論文賞を、
鷲津仁志教授らのグループが受賞しました。

受賞者:

梶田晴司  (株) 豊田中央研究所
遠山護   (株) 豊田中央研究所
鷲津仁志  兵庫県立大学大学院シミュレーション学研究科
大森俊英  (株) 豊田中央研究所
渡邊幸志  産業技術総合研究所 電子光技術研究部門
鹿田真一  関西学院大学 理工学部

受賞論文:

Friction Modification by Shifting of Phonon Energy Dissipation in Solid Atoms
Tribology Online 10, (2) 156-161 (2015).

Numerous researchers have focused on the relation between kinetic
friction and the surface properties of materials, such as their
surface roughness and chemical state, because kinetic friction is the
loss of kinetic energy at a sliding interface. Contrary to
conventional wisdom, recent theory has predicated that, given the fact
of phonon energy dissipation, kinetic friction depends on the
properties of bulk atoms in a solid, not only on the surface
properties. However, this expectation has not been proven. Here we
show evidence of this idea via atomic-scale experiments and
simulations. We compared the kinetic frictions of isotopically
distinct single-crystal diamonds, which differ only in atomic mass,
using atomic force microscopy and observed that the friction of 13C
diamond is lower than that of 12C diamond by approximately
3%. Simulations and theoretical analysis reproduce this result well,
suggesting that the lower friction of 13C diamond originates from the
inhibition of the energy-dissipative phonon by a heavier atom
mass. This discovery provides a design concept of low-friction
materials by tuning the energy-dissipation process with modification
of the inner-solid properties; i.e. phonon properties.

論文PDF: https://www.jstage.jst.go.jp/article/trol/10/2/10_156/_pdf