Effect of diamond grain size on the tribological properties of WS2-based multilayer coatings

Friction and wear performance of austenite stainless steels have been extensively studied and show a close relationship with the friction-induced martensitic transformation. However, how the grain size and associated friction-induced martensitic transformation behavior affect the tribological properties of austenite steels have not been systematically studied. In this work, dry sliding tests were performed on an AISI 304 stainless steel with a grain size ranging from 25 to 92 μm. The friction-induced surface morphology and microstructure evolution were characterized. Friction-induced martensitic transformation behavior, including martensite nucleation, martensite growth and martensite variant selection and its effect on the friction and wear behavior of the 304 stainless steel were analyzed. The results showed that both the surface coefficient of friction (COF) and the wear rate increase with the grain size. The COF was reduced three times and wear rate was reduced by 30% as the grain size decreased from 92 to 25 μm. A possible mechanism is proposed to account for the effect of grain size on the tribological behavior. It is discussed that austenite steel with refined grain size tends to suppress the amount of friction-induced martensitic transformed and significantly alleviates both the plowing and adhesive effect during dry sliding.

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The Study of Sputtered Silver-Based Low-Emissivity Coating on Glass

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.150-151.36 ◽

2010 ◽

Vol 150-151 ◽

pp. 36-39 ◽

Cited By ~ 1

Author(s):

Bin Cai ◽

Rong Sheng Xin ◽

Xiao Lin Jia

Keyword(s):

Grain Size ◽

Fourier Transform ◽

Surface Morphology ◽

Scanning Probe ◽

Visible Range ◽

Multilayer Coatings ◽

Transmittance Spectra ◽

Glass Substrates ◽

Infrared Spectrometer ◽

Probe Microscope

Two types of low-emissive coatings were deposited onto glass substrates by magnetron sputting method, which were designed as Ag and TiO2/Ni-Cr/Ag/Ni-Cr/TiO2. The transmittance and thickness of the samples were measured by TH1901 spectrophotometer and NKD-8000V ellipsometer. Fourier transform infrared spectrometer (FTIR) was employed to detect the low emissivity properties, it demonstrated that the silver-based multilayer coatings showed an efficient heat isolation due to their low emissivity properties. And they had a good performance in the visible range compared to the single Ag layer according to the transmittance spectra as well. The surface morphology of the samples was investigated by scanning probe microscope (SPM), it was determined that the Ag layer formed a homogeneous grain size when deposited onto the Ni-Cr layers.

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Surface Morphology and Tribological Properties of Nanoscale (Ti, Al, Si, C)N Multilayer Coatings Deposited by Reactive Magnetron Sputtering

Lubrication - Tribology, Lubricants and Additives ◽

10.5772/intechopen.73141 ◽

2018 ◽

Author(s):

Mei Wang ◽

Shojiro Miyake

Keyword(s):

Surface Morphology ◽

Magnetron Sputtering ◽

Tribological Properties ◽

Reactive Magnetron Sputtering ◽

Multilayer Coatings ◽

Reactive Magnetron

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Influence of bilayer period and thickness ratio on the mechanical and tribological properties of CrSiN/TiAlN multilayer coatings

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2011.07.045 ◽

2011 ◽

Vol 206 (7) ◽

pp. 1886-1892 ◽

Cited By ~ 10

Author(s):

Meng-Ko Wu ◽

Jyh-Wei Lee ◽

Yu-Chen Chan ◽

Hsien-Wei Chen ◽

Jenq-Gong Duh

Keyword(s):

Tribological Properties ◽

Thickness Ratio ◽

Multilayer Coatings ◽

Mechanical And Tribological Properties ◽

Bilayer Period

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Study on the Grinding Process of Ceramic Zirconia Oxide Rod

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.575.121 ◽

2014 ◽

Vol 575 ◽

pp. 121-127

Author(s):

Shinn Liang Chang ◽

Dai Jia Juan ◽

Bean Yin Lee ◽

You Jhih Lin

Keyword(s):

Surface Roughness ◽

Grain Size ◽

Rotation Speed ◽

Grinding Wheel ◽

Grinding Process ◽

Hard Machining ◽

Grinding Machine ◽

Diamond Grain ◽

Zirconia Oxide

Grinding technology is used in this study to overcome the hard machining of ceramic with hard and brittle characteristics. The grinding machine with diamond grain size 25 and 5 , spindles speed 1720 rpm and 3450 rpm are applied. Combining the unintentional roll clamp and the grinding machine, ceramic rods can be ground to the desired size.In the research, surface profilometer is applied to measure the rod surface roughness of processing results under different conditions. The results show that the grinding wheel with finer particle, the roughness of the ground ceramic rod will be better. While the rotation speed of grinding wheel is increased, the surface roughness will have the same trend.

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