TY - JOUR
T1 - Self-ion irradiation on hydrogenated amorphous carbon films at depth of adhesion interlayer
T2 - Radiation-induced atomic intermixing and degraded film properties
AU - Xu, Jiao
AU - Qiao, Li
AU - Duan, Zewen
AU - Guo, Dengji
AU - Chai, Liqiang
AU - Zhao, Xiaoyu
AU - Wang, Peng
AU - Liu, Weimin
N1 - Publisher Copyright:
© 2020 John Wiley & Sons, Ltd.
PY - 2020/9/1
Y1 - 2020/9/1
N2 - Hydrogenated amorphous carbon (a-C:H) films consisting of a top a-C:H layer, a gradient transient a-C:H:Ti layer, and a bottom Ti layer were irradiated by 1.1-MeV C+ ions, resulting in a maximum displacement damage of 1.0 dpa and a projected range inside the Ti layer. Time-of-flight secondary ion mass spectrometry, electron energy loss spectroscopy, high-resolution transmission electron microscopy, and X-ray photoelectron spectroscopy analyses were performed to investigate the compositional and structural transitions of a-C:H films after self-ion irradiation. The results revealed that C+ ions passing through the top a-C:H layer induced C–H fracture and hydrogen diffusion in this layer and then resulted in atomic intermixing in the multilayered adhesion interlayer. After local energy deposition of C+ ions, the initial sharp interfaces in the a-C:H:Ti layer became ambiguous due to interfacial mixing. In addition, titanium carbides formed in the Ti layer, with a gradual phase transition from TiCx to TiC with a diffusion depth of 200 nm. The broken compositional gradients of the adhesion interlayer resulted in a significant decrease in the adhesion strength of the films, which eventually resulted in degraded antiwear properties of the irradiated film in dry sliding tribotests.
AB - Hydrogenated amorphous carbon (a-C:H) films consisting of a top a-C:H layer, a gradient transient a-C:H:Ti layer, and a bottom Ti layer were irradiated by 1.1-MeV C+ ions, resulting in a maximum displacement damage of 1.0 dpa and a projected range inside the Ti layer. Time-of-flight secondary ion mass spectrometry, electron energy loss spectroscopy, high-resolution transmission electron microscopy, and X-ray photoelectron spectroscopy analyses were performed to investigate the compositional and structural transitions of a-C:H films after self-ion irradiation. The results revealed that C+ ions passing through the top a-C:H layer induced C–H fracture and hydrogen diffusion in this layer and then resulted in atomic intermixing in the multilayered adhesion interlayer. After local energy deposition of C+ ions, the initial sharp interfaces in the a-C:H:Ti layer became ambiguous due to interfacial mixing. In addition, titanium carbides formed in the Ti layer, with a gradual phase transition from TiCx to TiC with a diffusion depth of 200 nm. The broken compositional gradients of the adhesion interlayer resulted in a significant decrease in the adhesion strength of the films, which eventually resulted in degraded antiwear properties of the irradiated film in dry sliding tribotests.
KW - adhesion strengths
KW - atomic intermixing
KW - properties degradations
KW - self-ion irradiation
KW - structural transitions
UR - http://www.scopus.com/inward/record.url?scp=85083847507&partnerID=8YFLogxK
U2 - 10.1002/sia.6785
DO - 10.1002/sia.6785
M3 - 文章
AN - SCOPUS:85083847507
SN - 0142-2421
VL - 52
SP - 553
EP - 568
JO - Surface and Interface Analysis
JF - Surface and Interface Analysis
IS - 9
ER -