Novel carbon-based nc-MoC/a-C(Al) nanocomposite coating towards low internal stress and low-friction

2014 ◽  
Vol 242 ◽  
pp. 177-182 ◽  
Author(s):  
Shengguo Zhou ◽  
Hao Chen ◽  
Liqiu Ma
Keyword(s):  
Internal Stress ◽  
Nanocomposite Coating ◽  
Low Friction ◽  
Carbon Based

DEVELOPMENT OF CARBON-BASED COATING OF EXTREMELY HIGH TOUGHNESS WITH GOOD HARDNESS

2004 ◽  
Vol 03 (04n05) ◽  
pp. 571-578 ◽  
Author(s):  
S. ZHANG ◽  
X. L. BUI ◽  
Y. FU ◽  
H. DU
Keyword(s):  
Residual Stress ◽  
Contact Angle ◽  
Amorphous Carbon ◽  
High Hardness ◽  
Hydrophobic Surface ◽  
Nanocomposite Coating ◽  
High Toughness ◽  
Surface Contact ◽  
Surface Contact Angle ◽  
Carbon Based

Metallic Al was doped into amorphous carbon (a-C) to form a matrix of a-C(Al) of very low residual stress and high toughness at the expense of some hardness. Nanocrystallites of TiC (nc-TiC) of a few nanometers in size were embedded in this matrix to bring back the hardness. The nanocomposite coating of nc-TiC/a-C(Al) was deposited via co-sputtering of graphite, Ti , and Al targets. Although the nanocomposite coating exhibited a moderately high hardness (about 20 GPa), it possessed extremely high toughness (about 55% of plasticity during indentation deformation) and low residual stress (less than 0.4 GPa), smooth (Ra=5.5 nm ), and hydrophobic surface (contact angle with water reaches 100°).

Tribological Characteristics of AlMgB14 and Nanocomposite AlMgB14-TiB2 Superhard Coatings

2008 ◽  
Author(s):  
Jun Qu ◽  
Peter J. Blau ◽  
Dong Zhu ◽  
Bruce A. Cook ◽  
Alaa A. Elmoursi
Keyword(s):  
Physical Vapor Deposition ◽  
Nanocomposite Coating ◽  
Bearing Steel ◽  
Hard Coatings ◽  
Dry Sliding ◽  
Low Friction ◽  
Wear Rates ◽  
Aisi 52100 ◽  
Order Of Magnitude ◽  
Significant Extension

This study investigated the friction and wear characteristics of two super-hard coatings on M2 steel. One was AlMgB14, produced by pulsed laser deposition (PLD), and the other was a nanocomposite of AlMgB14-TiB2, produced by physical vapor deposition (PVD). Tests were conducted under unidirectional and reciprocating sliding against AISI 52100 bearing steel in both dry and oil-lubricated conditions. The AlMgB14 coating exhibited an encouraging but short-lived low friction stage (μ = 0.2) in dry sliding. The AlMgB14-TiB2 coating reduced the wear rates by one order of magnitude relative to the M2 steel and three orders of magnitude for the counterface in dry sliding. This nanocomposite coating also demonstrated significant extension (>2.5X) of the low friction (non-scuffing) stage when sliding under starved lubrication.

Preparation, Characterization, and Properties of Novel Carbon-Based nc-CrC/a-C(Al) Nanocomposite Coating

2014 ◽  
Vol 57 (2) ◽  
pp. 267-274 ◽  
Author(s):  
Hao Chen ◽  
Shengguo Zhou ◽  
Liqiu Ma ◽  
Liping Wang
Keyword(s):  
Nanocomposite Coating ◽  
Carbon Based

Low-friction carbon-based tribofilm from poly-alpha-olefin oil on thermally oxidized Ti6Al4V

2018 ◽  
Vol 337 ◽  
pp. 471-477 ◽  
Author(s):  
Lei Cao ◽  
Jian Liu ◽  
Yong Wan ◽  
Shuyan Yang ◽  
Jianguo Gao ◽  
...  
Keyword(s):  
Low Friction ◽  
Alpha Olefin ◽  
Carbon Based

S114031 Creation of contact surface for low friction system using carbon based coating in ambient air

2011 ◽  
Vol 2011 (0) ◽  
pp. _S114031-1-_S114031-3
Author(s):  
Kyosuke SATO ◽  
Yoshinobu SUZUKI ◽  
Masaaki HIROSE ◽  
Koshi ADACHI
Keyword(s):  
Contact Surface ◽  
Ambient Air ◽  
Low Friction ◽  
Carbon Based

Carbon based coatings for applications in friction couples with bearing steel and aluminium alloy

2017 ◽  
Vol 1 (87) ◽  
pp. 12-20
Author(s):  
M. Makówka ◽  
B. Wendler
Keyword(s):  
Tribological Properties ◽  
Steel Substrate ◽  
Bearing Steel ◽  
Friction Couple ◽  
Low Friction ◽  
Alsi Alloy ◽  
Pin On Disc ◽  
New Type ◽  
Steel Substrates ◽  
Carbon Based

Purpose: Low friction nc-WC/a-C:H coatings deposited by means of magnetron sputtering provide very good tribological properties in friction couple against hard steels and good adhesion to steel substrates. Nevertheless, it was necessary to elaborate a new type of coatings because the nc-WC/a-C:H one had no use in friction couple against aluminium alloys. Design/methodology/approach: In the paper the WC/a-C:H and (Si, Cr)C/a-C:H coatings were investigated. The coatings were investigated by means of SEM, EDS, in order to obtain thickness, surface morphology and chemical composition of coatings. Tribological properties of deposited coatings were elaborated by means of 'pin-on-disc' method in friction couple against 100Cr6 bearing steel and AlSi alloy. Findings: It was stated that (Si, Cr)C/a-C:H coatings have very good tribological properties in friction couple against bearing steel and AlSi alloy (friction coefficient <0,1). In case of WC/a-C:H coatings, good tribological properties were achieved in friction couple with bearing steel. Both coatings have very low wear rate in investigated friction couples. Research limitations/implications: The (Si,Cr)C/a-C:H coating have a worse quality of adhesion to quenched and tempered Vanadis 23 HS steel substrate in comparison with the nc-WC/a-C:H coating. Resolving this disadvantage can increase potential of application of (Si, Cr)C/a-C:H coatings. Practical implications: Newly developed (Si, Cr)C/a-C:H coating has a greater application potential for modification of surfaces of elements working in friction couples against hardened steels and light alloys like AlSi. Originality/value: There are numerous publications where low friction carbon based coatings were described mostly as a coatings deposited on elements working in friction couples against hard steels. Undertaken tests showed that the newly developed (Si,Cr)C/a- C:H coating can have a broad spectrum of applications in friction couples against different counterbodies, including light Al alloys.

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