Analysis of Film Thickness Effect in Slow-Speed Lightly-Loaded Elasto- Hydrodynamic Contacts. Part 2. Measurement of Film Thicknesses in Vacuum

1976 ◽  
Author(s):  
J. C. Tyler ◽  
R. D. Brown ◽  
H. J. Carper ◽  
P. M. Ku
Keyword(s):  
Film Thickness ◽  
Thickness Effect ◽  
Slow Speed

Dependence of Film Thickness on Properties of Al Doped ZnO Thin Films

2011 ◽  
Vol 194-196 ◽  
pp. 2305-2311
Author(s):  
Ying Ge Yang ◽  
Dong Mei Zeng ◽  
Hai Zhou ◽  
Wen Ran Feng ◽  
Shan Lu ◽  
...  
Keyword(s):  
Thin Films ◽  
Film Thickness ◽  
Electrical Parameter ◽  
Substrate Surface ◽  
Rf Magnetron Sputtering ◽  
Thickness Effect ◽  
Visible Range ◽  
Glass Substrates ◽  
Doped Zno

In this study high quality of Al doped ZnO (ZAO) thin films were prepared by RF magnetron sputtering on glass substrates at room temperature in order to study the thickness effect upon their structure, electrical and optical properties. XRD results show that the films are polycrystalline and with strongly preferred (002) orientation perpendicular to substrate surface whatever the thickness is. The crystallite size was calculated by Williamson-Hall method, while it increases as the film thickness increased. The lattice stress is mainly caused by the growth process. Hall measurements revealed electrical parameter very dependent upon thickness when the thickness of ZAO film is lower than 700 nm. The resistivity decreased and the carrier concentration and Hall mobility increases as the film thickness increased. When film thickness becomes larger, only a little change in the above properties was observed. All the films have high transmittance above 90% in visible range. Red shift of the absorption edge was observed as thickness increased. The optical energy bandgap decreased from 3.41eV to 3.30 eV with the increase of film thickness.

Film thickness effect on texture and residual stress sign transition in sputtered TiN thin films

2017 ◽  
Vol 43 (15) ◽  
pp. 11992-11997 ◽  
Author(s):  
Yeting Xi ◽  
Kewei Gao ◽  
Xiaolu Pang ◽  
Huisheng Yang ◽  
Xiaotao Xiong ◽  
...  
Keyword(s):  
Thin Films ◽  
Residual Stress ◽  
Film Thickness ◽  
Thickness Effect ◽  
Tin Thin Films

Applicability of an Oil Based Calculation Approach for Wear Risk and Wear Lifetime to Grease Lubricated Gear Pairings

2019 ◽  
Author(s):  
Benedikt J. Siewerin ◽  
Andreas Dobler ◽  
Thomas Tobie ◽  
Karsten Stahl
Keyword(s):  
Film Thickness ◽  
Failure Modes ◽  
Surface Hardness ◽  
Wear Intensity ◽  
Experimental Investigations ◽  
Limiting Factor ◽  
Slow Speed ◽  
Base Oil ◽  
Wear Rates ◽  
Lubricating Film

Abstract Gear pairings often run under very high loads. That can result in different kinds of failure modes limiting their lifetime. Many of the known gear failure modes are tribologically influenced. Especially for gear pairs running with lower circumferential speeds or with different surface hardness, (continuous or slow speed) wear is often the lifetime limiting factor. Slow speed wear appears continuously over a longer period of runtime. In many cases, such applications are lubricated with greases. Since the standardized calculation methods (e.g. ISO 6336) do not cover any determination of wear, one common way to predict the wear lifetime is the calculation method according to Plewe. In the associated Plewe diagram the worn off amount of material is correlated to the minimal lubricant film thickness in the tooth contact. The wear intensity decreases for higher film thicknesses. However, this method has certain limits for greases, because the film thickness of a grease, its bleed oil and the base oil is not necessarily the same. Additionally, the consistency and the flow properties have to be considered, because they influence the lubrication supply mechanism (circulating or channeling). Under certain circumstances channeling could be predominant. Although in theory a grease should build a thicker lubricating film than its base oil, experimental investigations have shown higher wear rates in comparison to oil lubrication.

Film thickness effect on the performance of small molecular solar cell

2008 ◽  
Vol 4 (5) ◽  
pp. 321-323 ◽  
Author(s):  
Hui Lin ◽  
Jun-sheng Yu ◽  
Jiang Huang ◽  
Ya-dong Jiang
Keyword(s):  
Solar Cell ◽  
Film Thickness ◽  
Thickness Effect

Investigation of Characteristics of Multi-Function ZnO Thin Film Deposited with Various Argon and Oxygen Ratios

2009 ◽  
Vol 1174 ◽  
Author(s):  
Jong-Shin Wu ◽  
Che-Wei Hsu ◽  
Tsung-Chieh Cheng ◽  
Chun-Hui Yang ◽  
Yi-Ling Shen ◽  
...  
Keyword(s):  
Thin Film ◽  
Film Thickness ◽  
Photoelectron Spectroscopy ◽  
Glass Substrate ◽  
Visible Region ◽  
Thickness Effect ◽  
Zno Thin Film ◽  
X Ray ◽  
Uv Shielding ◽  
Highly Hydrophobic

AbstractThe ZnO thin film was successfully deposited on a glass substrate at RT by a RF reactive magnetron sputtering method. Structural, chemical, optical, and hydrophilic/hydrophobic properties are measured by using a surface profilometer, an x-ray diffractometry (XRD), an x-ray photoelectron spectroscopy (XPS), a UV-VIS spectrophotometer, and a contact angle system, respectively. Results show that the deposition rate decreases with increasing O2/(Ar+O2) ratio. Otherwise, the best stoichiometric and quality of ZnO thin film was observed at 0.30 of O2/(Ar+O2) ratio by the smallest FWHM and the strong O-Zn bonds. Regardless of O2/(Ar+O2) ratio effect or thickness effect, high transmittance (> 86%) in the visible region is observed, while the UV-shielding characteristics depend upon both the magnitude of film thickness. The film thickness plays a more prominent role in controlling optical properties, especially in the UV-shielding characteristics, than the O2/(Ar+O2) ratio. However, the hydrophobic characteristics can be obtained when the glass coating with ZnO thin films. In general, with properly coated ZnO thin film, we can obtain a glass substrate which is highly transparent in the visible region, has good UV-shielding characteristics, and possesses highly hydrophobic characteristics (self-clean capability), which is highly suitable for applications in the glass industries.

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