Stress-dependent adhesion and sliding-induced nanoscale wear of diamond-like carbon studied using in situ TEM nanoindentation

Jhih H. Liang, Zac Milne, Mehdi Rouhani, Yi Pan Lin, Rodrigo A. Bernal, Takaaki Sato, Robert W. Carpick, Yeau R. Jeng

研究成果: Article同行評審

3 引文 斯高帕斯(Scopus)

摘要

We present the first in situ transmission electron microscope (TEM) study of extended sliding of diamond-like carbon (DLC) on diamond. We show how the tribological properties of amorphous carbon (a-C) reach their limit by exploring the onset of wear for the harsh condition of sliding against diamond in vacuum. A particularly hard, hydrogen-free member of the DLC family, a-C is of wide technological interest, but the mechanisms by which damage occurs during tribological contact are not well understood. Real-time TEM imaging of the nanoscale contact area provides insight into wear mechanisms and damage. We show that at high normal stresses with full sliding contributing to additional shear stress, the initially low adhesion of the a-C-diamond interface rapidly increases at a rate greater than is seen in similar silicon-diamond contact studies. We propose that high contact stresses wear away a relatively low surface energy sp2-rich layer on the outer a-C surface, exposing sp3-rich sub-layers which can form covalent bonds that require more tensile force to be broken, leading to higher adhesion and an acceleration of wear.

原文English
頁(從 - 到)230-241
頁數12
期刊Carbon
193
DOIs
出版狀態Published - 2022 6月 30

All Science Journal Classification (ASJC) codes

  • 化學 (全部)
  • 材料科學(全部)

指紋

深入研究「Stress-dependent adhesion and sliding-induced nanoscale wear of diamond-like carbon studied using in situ TEM nanoindentation」主題。共同形成了獨特的指紋。

引用此