Metrological Support for the Measurement of Tribological Properties of Carbon-carbon Composite in Braking Devices

2021 ◽  
pp. 70-80
Author(s):  
V. V. Alisin
Keyword(s):  
Tribological Properties ◽  
Metrological Support ◽  
Carbon Composite

Deposition and Tribological Properties of CVD Diamond/Diamond-Like Carbon Composite Films

2012 ◽  
Vol 565 ◽  
pp. 615-620
Author(s):  
Bin Shen ◽  
Liang Wang ◽  
Su Lin Chen ◽  
Fang Hong Sun
Keyword(s):  
Surface Morphology ◽  
Composite Film ◽  
Tribological Properties ◽  
Composite Films ◽  
Cvd Diamond ◽  
Carbon Composite ◽  
Dry Sliding ◽  
Diamond Like Carbon ◽  
Dlc Film ◽  
Bonding State

The CVD diamond/diamond-like carbon composite film is fabricated on the WC-Co substrate by depositing a layer of Diamond-like Carbon film on the surface of conventional Micro- or Nano-crystalline diamond film. The hot filament chemical vapor deposition (HFCVD) method and vacuum arc discharge with a graphite cathode are adopted respectively to deposit the MCD/NCD and DLC films. A variety of characterization techniques, including filed emission scanning electron microscope (FE-SEM) and Raman spectroscopy are employed to investigate the surface morphology and atomic bonding state of as-deposited MCD/DLC and NCD/DLC composite film. The results show that both MCD/DLC and NCD/DLC composite films present similar surface morphology with the MCD and NCD films, except for scattering a considerable amount of small-sized diamond crystallites among the grain boundary area. The atomic-bonding state of as-deposited MCD/DLC and NCD/DLC composite films is determined by the top-layered DLC film, which is mainly consisted of amorphous carbon phase and no discernible sp3 characteristic peak can be observed from their Raman spectrum. Furthermore, the tribological properties of as-deposited MCD/DLC and NCD/DLC composite films is examined using a ball-on-plate reciprocating friction tester under both dry sliding and water-lubricating conditions, comparing with conventional DLC, MCD and NCD films. Silicon nitride balls are used as counterpart materials. For the CVD diamond/DLC composite films, the self-lubricating effect of top-layered DLC film is beneficial for suppressing the initial friction peak, as well as shortening the run-in period. The average friction coefficients of MCD/DLC and NCD/DLC composite films during stable sliding period are 0.07 and 0.10 respectively in dry sliding; while under water-lubricating condition, they further decreases to 0.03 and 0.07.

THE EFFECT OF MeC NANOPARTICLES ON THE MICROMECHANICAL AND TRIBOLOGICAL PROPERTIES OF CARBON COMPOSITE COATINGS

Tribologia ◽  
2018 ◽  
Vol 280 (4) ◽  
pp. 157-163
Author(s):  
Sławomir ZIMOWSKI ◽  
Marcin KOT ◽  
Tomasz MOSKALEWICZ
Keyword(s):  
Wear Resistance ◽  
Amorphous Carbon ◽  
Tribological Properties ◽  
Composite Coatings ◽  
Carbon Matrix ◽  
Carbon Composite ◽  
Nanocrystalline Phase ◽  
Strong Adhesion ◽  
Scratch Tests ◽  
The Impact

Nanocomposite carbon coatings composed of a nanocrystalline phase and an amorphous carbon matrix (a-C or a-C:H) are an important group of coatings for tribological applications, especially if low friction is desired. Strong adhesion between the coating and the substrate as well as the ability to carry load are particularly important in ensuring the durability of the system. In this paper, the impact of a reinforcing phase in the form of hard carbides of chromium, titanium and tungsten (MeC) on the micromechanical and tribological properties of MeC/a-C coatings were analysed. The microhardness and modulus of elasticity using the indentation method and adhesion of these coatings to the substrate in scratch tests were determined. On the basis of tribological tests, the friction coefficient and wear rate of the coatings were determined during nonlubricated sliding contact with an alumina ball. The tested nanocomposite coatings showed very good sliding properties and wear resistance. The nc-WC/a-C and nc-TiC/a-C coatings exhibit the smallest coefficient of friction (below 0.1) and the highest wear resistance. The presence of nanocrystalline carbides in the amorphous carbon matrix limits the propagation of cracks in the coatings and allows the higher load carrying capacity.

Phase composition and tribological properties of copper/carbon composite films

2005 ◽  
Vol 200 (7) ◽  
pp. 2146-2151 ◽  
Author(s):  
W. Gulbiński ◽  
S. Kukiełka ◽  
Y. Pauleau ◽  
F. Thièry
Keyword(s):  
Phase Composition ◽  
Tribological Properties ◽  
Composite Films ◽  
Carbon Composite

TRIBOLOGICAL PROPERTIES OF SILICON INFILTRATED SiC GRADES CONTAINING CARBON PARTICLES

1986 ◽  
Vol 47 (C1) ◽  
pp. C1-745-C1-749
Author(s):  
W. HEIDER ◽  
R. RÖTTENBACHER
Keyword(s):  
Tribological Properties ◽  
Carbon Particles

Efficiency of application of the phase-chronometric method and neurodiagnostics for monitoring the degradation of rolling bearings during operation

2020 ◽  
pp. 43-50
Author(s):  
A.S. Komshin ◽  
K.G. Potapov ◽  
V.I. Pronyakin ◽  
A.B. Syritskii
Keyword(s):  
Life Cycle ◽  
Wavelet Analysis ◽  
Metrological Support ◽  
Rolling Bearing ◽  
Technical Condition ◽  
Measurement Information ◽  
Rolling Bearings ◽  
Vibration Diagnostics ◽  
Bearing Life ◽  
Alternative Approach

The paper presents an alternative approach to metrological support and assessment of the technical condition of rolling bearings in operation. The analysis of existing approaches, including methods of vibration diagnostics, envelope analysis, wavelet analysis, etc. Considers the possibility of applying a phase-chronometric method for support on the basis of neurodiagnostics bearing life cycle on the basis of the unified format of measurement information. The possibility of diagnosing a rolling bearing when analyzing measurement information from the shaft and separator was evaluated.

Investigation of Porous Silicon/Carbon Composite as Anodes for Lithium Ion Batteries

2015 ◽  
Vol 30 (4) ◽  
pp. 351 ◽  
Author(s):  
HUANG Yan-Hua ◽  
HAN Xiang ◽  
CHEN Hui-Xin ◽  
CHEN Song-Yan ◽  
YANG Yong
Keyword(s):  
Porous Silicon ◽  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Carbon Composite ◽  
Silicon Carbon
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