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Citation: QU Shao-Hua, JIA Li-Hui. Mechanical Properties of Si/DLC Films on Au and Au-Cu Substrates[J]. Acta Physico-Chimica Sinica, ;2009, 25(11): 2391-2394. doi: 10.3866/PKU.WHXB20091124 shu

Mechanical Properties of Si/DLC Films on Au and Au-Cu Substrates

QU Shao-Hua ,
JIA Li-Hui

1.
Department of Physics, Xiangfan University, Xiangfan 441053, Hubei Province, P. R. China

Received Date: 25 May 2009
Available Online: 29 September 2009

The mechanical properties of Si/DLC (diamond-like carbon, around 10 nm) films on Au and Au-Cu (xAu=93%, xCu=7%) substrates were studied by nanoscratch tests. Results show that Au-Cu exhibits better adhesion to Si/DLC than Au does to Si/DLC. Ultraviolet (244 nm) Raman spectra show that DLC films on Au-Cu contain more sp3 character than those on Au using the same batch coating process. This indicates greater hardness and higher density of the films on Au-Cu. The implications of these results on the mechanisms proposed for film formation are discussed. Au-Cu is thus a better candidate for use as a lead material in Si/DLC coatings because of its better adhesion and greater hardness for magnetic recording sliders.
- Raman spectroscopy,
- Diamond-like carbon film,
- Adhesion,
- Hardness
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