Tribological Properties of TiN/DLC Nanocomposite Coatings

2006 ◽  
Vol 317-318 ◽  
pp. 385-388
Author(s):  
Won Jae Yang ◽  
Tohru Sekino ◽  
Jong Won Yoon ◽  
Kwang Bo Shim ◽  
Koichi Niihara ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Sliding Friction ◽  
Tribological Behavior ◽  
Chemical Vapor ◽  
Nanocomposite Coatings ◽  
High Wear Resistance ◽  
Friction Test ◽  
Low Friction ◽  
Test Parameters ◽  
Flat Type

The TiN/DLC nanocomposite coatings were grown on Si wafers using Ar/CH4/TDMAT (Ti[(CH3)2N]4N2) gas mixtures by r.f. plasma enhanced chemical vapor deposition. The sliding friction tests were carried out using a ball-on-flat type tribometer. The different test parameters such as applied loads, counterpart materials and environment were applied to understand the tribological behavior in terms of friction and wear. The coatings provided a low friction coefficient and high wear resistance depending on the friction test conditions.

Effect of Reinforcement on the Tribological Behavior of CuFe-Based Composites

2016 ◽  
Vol 868 ◽  
pp. 18-22
Author(s):  
Hai Xia Guo ◽  
Nan Qu ◽  
Jian Feng Yang ◽  
Jun-Ichi Matsushita ◽  
Seung Ho Kim ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Friction And Wear ◽  
Sliding Friction ◽  
Wear Track ◽  
Tribological Behavior ◽  
Reinforcement Particle ◽  
Matrix Composites ◽  
Friction Test ◽  
Wear Performance ◽  
Braking Performance

Two types of CuFe matrix composites with different reinforcements: silica and alumina particulates were developed using powder metallurgy. The mechanical properties were determined from Brinell hardness and flexural strength. The dry sliding friction and wear performance of the composites were investigated by the friction test. The results indicated that mechanical properties of alumina were superior to those of silica. The friction tests of the composites showed that the alumina reinforcement particle provides better braking performance. A wear track examination of composites showed that same abrasive wear. Our results indicated that composites with alumina reinforcement particles of high compatibility are to be preferred for braking performance.

scholarly journals TiC/a-C Nanocomposite Coatings for Low Friction and Wear Resistance

2005 ◽  
Vol 475-479 ◽  
pp. 3655-3660 ◽  
Author(s):  
Y.T. Pei ◽  
Damiano Galvan ◽  
Jeff T.M. de Hosson
Keyword(s):  
Wear Resistance ◽  
Friction And Wear ◽  
Ambient Air ◽  
Bearing Steel ◽  
Nanocomposite Coatings ◽  
Columnar Microstructure ◽  
Low Friction ◽  
Micro Cracks ◽  
Steel Balls ◽  
Wear Tests

TiC/a-C:H nanocomposite coatings have been deposited by magnetron sputtering and are composed of 2-5nm TiC nanocrystallites well separated by amorphous hydrocarbon (a-C:H) of about 2nm separation width. A transition from columnar to glassy microstructure has been observed with increasing substrate bias or carbon content. Micro-cracks induced by nanoindentation or wear tests readily propagate through the column boundaries whereas the coatings without a columnar microstructure show supertough behavior. The nanocomposite coatings exhibit hardness of 5~20 GPa, superior wear resistance and strong self-lubrication effects with a friction coefficient of 0.05 in air and 0.01 in nitrogen under dry sliding against uncoated bearing steel balls. Especially, the transitions from low to ultralow friction or the reverse are repeatedly switchable if the atmosphere is cycled between ambient air and nitrogen. The lowest wear rate is obtained at high humidity.

On the Sliding Wear Behavior of PAEK Composites in Vacuum Environment

2019 ◽  
Vol 141 (4) ◽  
Author(s):  
Géraldine Theiler ◽  
A. P. Harsha ◽  
Thomas Gradt
Keyword(s):  
Carbon Fibers ◽  
Sliding Wear ◽  
Friction And Wear ◽  
Vacuum Chamber ◽  
Tribological Behavior ◽  
Wear Behavior ◽  
Low Friction ◽  
Test Conditions ◽  
Aisi 52100 ◽  
Pin On Disk

In the present study, the tribological behavior of polyaryletherketones (PAEKs) and their composites was investigated in air and vacuum environment. Polymer matrices were filled with either glass or carbon fibers and compared with a standard bearing material containing 10% carbon fiber (CF), 10% graphite, and 10% polytetrafluoroethylene (PTFE). The samples were tested in a pin-on-disk configuration under continuous sliding against a rotating steel disk (AISI 52100) at different sliding speeds. The results indicated that the tribological performance of these materials in vacuum depends on both compositions and test conditions. At low sliding speed, a very low friction and wear coefficients were obtained while at higher speed, severe wear occurred. In particular, CF filled composites showed excessive wear that led to the ignition after opening the vacuum chamber. Experimental results are discussed by analyzing the transfer film and wear debris.

Friction and Wear of Amorphous Hydrogenated Carbon

1995 ◽  
Vol 383 ◽  
Author(s):  
S. L. Heidger
Keyword(s):  
Relative Humidity ◽  
Friction And Wear ◽  
Structural Changes ◽  
Sliding Friction ◽  
Chemical Vapor ◽  
Silicon Substrates ◽  
Rf Power ◽  
Wear Rates ◽  
Power Densities ◽  
Amorphous Hydrogenated Carbon

ABSTRACTUniform amorphous hydrogenated carbon (a-C:H) films with surface roughnesses ranging between 1 nm and 4 nm were produced by radio frequency self biased plasma enhanced chemical vapor deposition (rf PECVD) on > Silicon substrates using 100% methane precursor gas mixture, rf power densities ranging between 0.11 W/cm2 and 1.07 W/cm2, and pressures ranging between 0.67 Pa and 40 Pa. Reciprocating sliding friction experiments were conducted on the a-C:H films with hemispherical, silicon nitride pins in dry nitrogen and in 60% relative humidity. The coefficients of friction and the wear rates of the a-C:H were very low in dry nitrogen, ranging from 0.03 to 0.05, and from 1.1 × 108 mm3/Nm to 2.3 × 10−6 mm3/Nm, respectively. In 60% relative humidity, the initial coefficients of friction were approximately 0.30. However, the steady state coefficients of friction of the a-C:H films ranged from 0.10 and 0.30, depending on the deposition conditions. The wear rates ranged from 2.0 × 10−9 mm3/Nm to 8.9 x 10−8 mm3/Nm in 60% relative humidity. Raman microprobe spectroscopy and Auger electron spectroscopy (AES) revealed that sliding friction was transforming the a-C:H films into a material primarily composed of sp2 bonded carbon with increasing short range order. Qualitatively, the amount of wear which occurred corresponded to the extent that the structural changes progressed. The a-C:H films were further characterized by scanning electron microscopy (SEM) and surface profilometry.

scholarly journals Structure and Tribo-Mechanical Properties of MoSx:N:Mo Thin Films Synthesized by Reactive dcMS/HiPIMS

2021 ◽  
Author(s):  
Wolfgang Tillmann ◽  
Alexandra Wittig ◽  
Dominic Stangier ◽  
Carl-Arne Thomann ◽  
Jörg Debus ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Mechanical Properties ◽  
Solid Lubricant ◽  
Tribological Behavior ◽  
Sliding Contact ◽  
High Wear Resistance ◽  
Film Material ◽  
Low Friction ◽  
Property Profile

AbstractModifying MoS2 thin films by additional elements shows great potential in order to adjust the property profile and to meet the increasing requirements regarding high wear resistance and low friction properties of industrial components. Within that context, MoSx:N:Mo thin films were deposited by a reactive hybrid dcMS/HiPIMS process. By systematically increasing the Mo target cathode power, an investigation of the structural and the mechanical properties was conducted to understand the evolution of the tribological behavior. A low Mo target cathode power of 1 kW is related to the formation of the preferential (002) MoS2 basal-plane and thus a low friction with µ = 0.2. With an increasing amount of Mo, the film loses its solid lubricant MoS2 properties and a nitride constitution of the thin film is developing due to the formation of crystalline Mo and MoN phases. Related to this transformation, the hardness and elastic modulus are increased, but the adhesion and the tribological properties are impaired. The film loses its plasticity and the generated film material is directly removed from the contact area during the sliding contact.

Tribological Properties Between a-C:H Coatings and SiO2 at High Temperature

2020 ◽  
Author(s):  
Noritsugu Umehara ◽  
Kota Konishi ◽  
Motoyuki Murashima ◽  
Takayuki Tokoroyama
Keyword(s):  
High Temperature ◽  
Friction Coefficient ◽  
Wear Rate ◽  
Tribological Properties ◽  
Friction And Wear ◽  
Wear Track ◽  
Severe Damage ◽  
Friction Test ◽  
Low Friction ◽  
Disk Friction

Abstract Tribological properties of a-C:H coatings has been investigated in various friction conditions. It is clear that temperature and mating materials give effects on tribological properties. In this study, we especially focus on the effect of mating material on its tribological properties of a-C:H coatings. Ball-on-disk friction test is conducted between a-C:H coating and 5 kinds of mating material, which is SiC, SiC(O)_800 (SiC oxidized at 800°C), SiC(O)_1050°C, SiC(O)_1300°C, and Quartz glass. It is found that a-C:H coatings shows low friction coefficient and low specific wear rate when O/Si ratio of the element content of mating material is 2, in other words, mating material is SiO2. In the wear scar of a-C:H coating after friction test with SiC, severe damage was confirmed. It is considered that a-C:H coating and SiO2 show low adhesion even at high temperature, which leads low friction and wear. Compared SiC(O) with Quartz, the friction coefficients with a-C:H coatings are respectively 0.013 and 0.038. Even though SiC(O) and Quartz are both SiO2, the tribological properties are different. On the wear track of SiC(O), transferred things from a-C:H coating are confirmed.

A Fundamental Study on Sliding Friction

1990 ◽  
Vol 18 (2) ◽  
pp. 104-115 ◽  
Author(s):  
N. Purushothaman ◽  
J. T. Tielking
Keyword(s):  
Experimental Investigation ◽  
Sliding Friction ◽  
Test Machine ◽  
Friction Test ◽  
Fundamental Study ◽  
Surface Samples ◽  
Friction Tester ◽  
Test Parameters ◽  
Contact Pressures ◽  
Tread Rubber

Abstract In this paper we report on an experimental investigation on the friction of tire tread sections sliding over a variety of surfaces. The Texas A&M friction tester was used to measure sliding friction at various speeds and contact pressures. The friction test machine is also described. Actual bituminous and concrete road pavements and artificial 3M Safety Walk were used as surface samples. Tread rubber sections taken from passenger car, truck, and aircraft tires were tested. The influence of major test parameters such as sliding speed, surface texture and contact pressure on friction are discussed.

Effects of frictional heat on the tribological properties of Ni3Al matrix self-lubricating composite containing graphene nanoplatelets under different loads

2017 ◽  
Vol 232 (6) ◽  
pp. 645-656 ◽  
Author(s):  
Yuchun Huang ◽  
Xiaoliang Shi ◽  
Kang Yang ◽  
Xiyao Liu ◽  
Zhihai Wang
Keyword(s):  
Working Conditions ◽  
Friction And Wear ◽  
Sliding Friction ◽  
Tribological Behavior ◽  
Tribological Performance ◽  
Graphene Nanoplatelets ◽  
Frictional Heat ◽  
Worn Surface ◽  
Al Matrix ◽  
Better Than

In order to analyze the effects of frictional heat on the tribological performance of Ni3Al matrix self-lubricating composite containing 6.2 vol.% graphene nanoplatelets (NB), the dry sliding friction tests of Ni3Al-based alloy and NB against GCr15 steel ball are undertaken under different loads from 3 to 18 N. The effects of different amount of frictional heat on the friction and wear mechanism of NB are also studied. The results show that tribological performance of NB is better than that of Ni3Al-based alloy under same working conditions. The addition of graphene nanoplatelets promotes the formation of stable glaze layer on worn surface. In addition, graphene nanoplatelets enhance the thermal conductivity of NB, which makes the surface temperature of wear scar of NB in a proper range (about 413 ℃) at 13 N and avoids the serious friction and wear caused by the accumulation of frictional heat. At 13 N, NB shows the lower friction coefficient (0.32) and wear rate (3.6 × 10−5 mm3·N−1·m−1). It is attributed to the appropriate local temperature (about 413 ℃) of worn surface, resulting in the formation of stable glaze layer with good friction reducing and wear resistance on worn surface. This study was meaningful for optimizing applied loads to realize the appropriate frictional heat and good tribological behavior of NB.

scholarly journals Dry Sliding Friction Analysis and Wear Behavior of Carbon Nanotubes / Vinylester Nanocomposites, Using Pin-on-Disc Test

2019 ◽  
Vol 70 (10) ◽  
pp. 3592-3596
Keyword(s):  
Carbon Nanotubes ◽  
Friction And Wear ◽  
Sliding Friction ◽  
Wear Behavior ◽  
Dry Sliding ◽  
Wear Properties ◽  
Test Parameters ◽  
Pin On Disc ◽  
The Coefficient Of Friction ◽  
Dry Sliding Friction

Dry sliding friction and wear behavior of single-wall (SW) and multi-wall (MW) carbon nanotubes (CNTs)/ vinylester composite have been investigated, under several loads and sliding speeds. Three different contents (0.1, 0.15 and 0.2 wt. %) of SWCNT and MWCNTs have been dispersed into the vinylester resin in order to obtain polymer nanocomposites. The present study discusses the coefficient of friction, specific wear rate and friction stability of vinylester composites with different CNTs content, using a pin-on-disc test. The friction and wear experiments were carried out following 3 loads×3 speeds, as test parameters. The best combination of friction and wear properties was found with the nanocomposite containing 0.2 wt.% MWCNT. Keywords: carbon nanotubes, vinylester, friction, wear

scholarly journals Super-Slick

1999 ◽  
Vol 121 (04) ◽  
pp. 46-48 ◽  
Author(s):  
John DeGaspari
Keyword(s):  
Friction And Wear ◽  
National Laboratory ◽  
Argonne National Laboratory ◽  
Chemical Vapor ◽  
Deposition Process ◽  
Cooperative Research ◽  
Low Friction ◽  
Rotating Shaft ◽  
Potential Applications ◽  
Cooperative Research And Development

This article discusses that the Argonne National Laboratory is beginning real-world tests of a carbon-based substance that has set records for low friction. An extremely hard ultralow-friction carbon coating, developed at Argonne National Laboratory in Argonne, IL, may offer a way to address friction and wear. Introduced about a year and a half ago, the new coating is nearly friction less under inert conditions. Argonne is working with three development partners, which have signed three-year cooperative research and development agreements to transfer this technology to industry. Two of the companies are working with engine applications; one is a commercial coater, adapting the near-frictionless material to its coating process. One of Argonne’s partners, Front Edge Technology Inc., an industrial coater in Baldwin Park, CA, is using a plasma-enhanced chemical vapor deposition process with the coating. Potential applications of the coating are in the mechanical drive portion of the engine, in which the reciprocating piston motions are converted into a rotating shaft motion.

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