Laser interference induced nano-crystallized surface swellings of amorphous carbon for advanced micro tribology
Laser interference induced nano-crystallized surface swellings of amorphous carbon for advanced micro tribology
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DOI：
10.1088/2053-1591/1/3/035042
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发表时间：
2014-09
影响因子：
2.3
通讯作者：
T. Roch;F. Klein;K. Guenther;Aljoscha Roch;T. Mühl;A. Lasagni
中科院分区：
文献类型：
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作者：
T. Roch;F. Klein;K. Guenther;Aljoscha Roch;T. Mühl;A. Lasagni
We have investigated the direct laser interference patterning (DLIP) of tetrahedral amorphous carbon (ta-C) thin films in the nanometer region. In this paper we achieved texturing of ta-C from a surface swelling either by a phase change from sp3 to sp2 or thin film delamination. In contrast to surface ablation, the thin film is not removed from the silicon surface. With this technique a surface nano-swelling of ta-C with an area-speed of 1 m2 min−1 and nanometric resolution can be realized. The phase changes in the ta-C, due to DLIP material heating are undermined by thermal simulations of the patterning process. Additionally we investigated for the first time the influence of periodic nano-swelling on the coefficient of friction (COF). The COF of periodic graphitized surfaces was found to be lower (∼50%) compared to as grown ta-C. This reduction of the COF can be attributed to a reduced area of contact.
