Study the effect of nitrogen flow rate on tribological properties of tantalum nitride based coatings

MoSN/MoS2 multilayer films were deposited by a sputtering MoS2 target in alternate Ar and Ar/N2 mixed atmospheres with different nitrogen flow rates. The influence of nitrogen flow rates on the microstructure, mechanical and tribological properties of the prepared films were investigated. The multilayer film exhibited the preferred orientation of (002) plane for MoS2 sublayers and amorphous structure for MoSN sublayers. Introducing N2 into the source gas resulted in a much more compact structure for multilayer films due to the suppression of columnar growth of MoS2 film. With the increase of the nitrogen flow rate, the hardness of the multilayer film firstly increased from 2.3 to 10.5 GPa as the nitrogen flow rate increased from 4 to 10 sccm and then turned downwards to 6.5 GPa at 20 sccm. MoSN/MoS2 film deposited with an optimized microstructure exhibited low friction coefficients below 0.03 and a wear life higher than 1.8×105 revolutions in vacuum. Meanwhile, the optimized film showed an ultralow friction coefficient of 0.004~0.01 and wear rate of 4.7 × 10−7 mm3/N·m in an ultrahigh vacuum. Both the enhanced hardness by N-doping and sustainable formed MoS2 tribofilm contributed to the improved tribological property of MoSN/MoS2 multilayer film.

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Effect of Sputtering Parameters on the Property of TaNx/Ag/TaNx Low-Emissivity Film

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.287-290.2261 ◽

2011 ◽

Vol 287-290 ◽

pp. 2261-2266 ◽

Cited By ~ 1

Author(s):

Jia Mu Huang ◽

Xiao Pei Hao ◽

Meng Wu ◽

Ge Tao Hu

Keyword(s):

Composite Film ◽

Flow Rate ◽

Chemical Durability ◽

Tantalum Nitride ◽

Light Transmittance ◽

Nitrogen Flow ◽

Optical Performance ◽

Nitrogen Flow Rate ◽

Deposition Parameters ◽

Sputtering Power

The effect of deposition parameters such as sputtering power, nitrogen flow rate and thickness of TaNxon the optical performance and chemical durability of composite Tantalum nitride /Ag/ tantalum nitride (TaNx/Ag/TaNx) films was investigated. When the configuration of composite film was TaNx(60nm)/Ag (12nm)/TaNx(60nm) accompanying with the sputtering power 120W and the nitrogen flow rate 50sccm, the visible light transmittance of composite film could reach up to 80% at the wavelength of 550nm and the emissivity was 0.087. In addition, the chemical durability of the coatings was evaluated and the results indicated that the low-e coating presented very good chemical durability.

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Pyrolysis of brown algae (Bifurcaria Bifurcata) in a stainless steel tubular reactor: From a review to a case study

Progress in Agricultural Engineering Sciences ◽

10.1556/446.14.2018.1.2 ◽

2018 ◽

Vol 14 (1) ◽

pp. 31-60 ◽

Cited By ~ 1

Author(s):

M. Y. Guida ◽

F. E. Laghchioua ◽

A. Hannioui

Keyword(s):

Particle Size ◽

Stainless Steel ◽

Flow Rate ◽

Brown Algae ◽

Tubular Reactor ◽

Nitrogen Flow ◽

Nitrogen Flow Rate ◽

Bifurcaria Bifurcata ◽

Bio Oil

This article deals with fast pyrolysis of brown algae, such as Bifurcaria Bifurcata at the range of temperature 300–800 °C in a stainless steel tubular reactor. After a literature review on algae and its importance in renewable sector, a case study was done on pyrolysis of brown algae especially, Bifurcaria Bifurcata. The aim was to experimentally investigate how the temperature, the particle size, the nitrogen flow rate (N2) and the heating rate affect bio-oil, bio-char and gaseous products. These parameters were varied in the ranges of 5–50 °C/min, below 0.2–1 mm and 20–200 mL. min–1, respectively. The maximum bio-oil yield of 41.3wt% was obtained at a pyrolysis temperature of 600 °C, particle size between 0.2–0.5 mm, nitrogen flow rate (N2) of 100 mL. min–1 and heating rate of 5 °C/min. Liquid product obtained under the most suitable and optimal condition was characterized by elemental analysis, 1H-NMR, FT-IR and GC-MS. The analysis of bio-oil showed that bio-oil from Bifurcaria Bifurcata could be a potential source of renewable fuel production and value added chemicals.

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A New Decisive Parameter for the Nitridation of Electrolyte Thin Films: the Nitrogen Flow Rate

ECS Meeting Abstracts ◽

10.1149/ma2007-01/3/212 ◽

2007 ◽

Keyword(s):

Thin Films ◽

Flow Rate ◽

Nitrogen Flow ◽

Nitrogen Flow Rate ◽

Decisive Parameter

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Effects of nitrogen flow rate in ohmic contacts on InAlN/GaN heterostructures

Electronics Letters ◽

10.1049/el.2014.2061 ◽

2014 ◽

Vol 50 (21) ◽

pp. 1545-1547

Author(s):

Dae‐Myeong Geum ◽

Seungheon Shin ◽

Min‐Su Park ◽

Jae‐Hyung Jang

Keyword(s):

Flow Rate ◽

Ohmic Contacts ◽

Nitrogen Flow ◽

Nitrogen Flow Rate

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Effect of nitrogen flow rate on the properties of TiN film deposited by e beam evaporation technique

Applied Surface Science ◽

10.1016/j.apsusc.2012.04.179 ◽

2012 ◽

Vol 258 (22) ◽

pp. 8498-8505 ◽

Cited By ~ 15

Author(s):

Nishat Arshi ◽

Junqing Lu ◽

Bon Heun Koo ◽

Chan Gyu Lee ◽

Faheem Ahmed

Keyword(s):

Flow Rate ◽

Nitrogen Flow ◽

Nitrogen Flow Rate ◽

Tin Film ◽

Evaporation Technique

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Structure and Properties of Nanocrystalline (TiZr)xN1−xThin Films Deposited by DC Unbalanced Magnetron Sputtering

Journal of Nanomaterials ◽

10.1155/2016/2982184 ◽

2016 ◽

Vol 2016 ◽

pp. 1-12 ◽

Cited By ~ 2

Author(s):

Yu-Wei Lin ◽

Chia-Wei Lu ◽

Ge-Ping Yu ◽

Jia-Hong Huang

Keyword(s):

Thin Films ◽

Residual Stress ◽

Magnetron Sputtering ◽

Flow Rate ◽

Nitrogen Flow ◽

Structure And Properties ◽

X Ray Diffraction ◽

Nitrogen Flow Rate ◽

Unbalanced Magnetron Sputtering ◽

Unbalanced Magnetron

This study aims to investigate the effects of nitrogen flow rate (0–2.5 sccm) on the structure and properties of TiZrN films. Nanocrystalline TiZrN thin films were deposited on Si (001) substrates by unbalanced magnetron sputtering. The major effects of the nitrogen flow rate were on the phase, texture, N/(Ti + Zr) ratio, thickness, hardness, residual stress, and resistivity of the TiZrN films. The nitrogen content played an important role in the phase transition. With increasing nitrogen flow rate, the phase changed from mixed TiZr and TiZrN phases to a single TiZrN phase. The X-ray diffraction results indicated that (111) was the preferred orientation for all TiZrN specimens. The N/(Ti + Zr) ratio of the TiZrN films first increased with increasing nitrogen flow rate and then stabilized when the flow rate further increased. When the nitrogen flow rate increased from 0.4 to 1.0 sccm, the hardness and residual stress of the TiZrN thin film increased, whereas the electrical resistivity decreased. None of the properties of the TiZrN thin films changed with nitrogen flow rate above 1.0 sccm because the films contained a stable single phase (TiZrN). At high nitrogen flow rates (1.0–2.5 sccm), the average hardness and resistivity of the TiZrN thin films were approximately 36 GPa and 36.5 μΩ·cm, respectively.

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GROWTH STRUCTURE EFFECT ON THE CORROSION RESISTANCE AND MECHANICAL PROPERTIES OF CrNx COATING

Surface Review and Letters ◽

10.1142/s0218625x19500914 ◽

2019 ◽

Vol 27 (01) ◽

pp. 1950091 ◽

Cited By ~ 2

Author(s):

JIAOJIAO DU ◽

HAIBIN ZHOU ◽

CAIXIA SUN ◽

HAIJIANG KOU ◽

ZHONGWEI MA ◽

...

Keyword(s):

Corrosion Resistance ◽

Corrosion Behavior ◽

Flow Rate ◽

Steel Substrate ◽

Face Centered Cubic ◽

Nitrogen Flow ◽

Nitrogen Flow Rate ◽

Flow Rates ◽

Sputtering Deposition ◽

Growth Structure

A new approach was adopted to improve the corrosion behavior of the chromium nitride (CrNx) hard coating through magnetron sputtering deposition at different nitrogen flow rates. The influence of the nitrogen flow rates on the chemical composition, microstructure, mechanical property and corrosion behavior in artificial seawater of the CrNx coatings was investigated. The results show that with the increase of the nitrogen flow rates, the growth structure of the coatings varied from dense granular growth to coarse columnar growth. Increasing the nitrogen flow rates was helpful to decrease the Cr/N ratio and induce the phase transforming from mixed hexagonal Cr2N and face-centered cubic CrN to single CrN. However, the coatings under different nitrogen flow rates significantly improved the corrosion resistance and hardness of the steel substrate. Furthermore, at high nitrogen flow rate, the coating had high corrosion velocity and low protective capability against the substrate corrosion due to the fast corrosion channels acted by the columnar grain boundaries. While at the middle nitrogen flow rate, the coating with CrN phase, densely granular growth structure and moderate grain size resulted in excellent corrosion resistance and highest hardness.

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