Graphite fluoride and fluorographene as a new class of solid lubricant additives for high‐performance polyamide 66 composites with excellent mechanical and tribological properties

2020 ◽  
Vol 69 (5) ◽  
pp. 457-466 ◽  
Author(s):  
Haoyang Sun ◽  
Tao Li ◽  
Fan Lei ◽  
Meng Yang ◽  
Dandan Li ◽  
...  
Keyword(s):  
Tribological Properties ◽  
High Performance ◽  
Solid Lubricant ◽  
Lubricant Additives ◽  
Polyamide 66 ◽  
Solid Lubricant Additives ◽  
Mechanical And Tribological Properties ◽  
Graphite Fluoride ◽  
New Class

Preparation of high-performance PEEK anti-wear blends with melt-processable PTFE

2019 ◽  
Vol 32 (6) ◽  
pp. 645-654
Author(s):  
Xiaotao Qiu ◽  
Congli Fu ◽  
Aiqun Gu ◽  
Yang Gao ◽  
Xiuli Wang ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Wear Resistance ◽  
Surface Analysis ◽  
Tribological Properties ◽  
High Performance ◽  
Tribological Performance ◽  
Mechanical And Tribological Properties ◽  
The Past ◽  
Wide Range ◽  
Potential Applications

High-performance anti-wear polyetheretherketone/polytetrafluoroethylene (PEEK/PTFE) blends have drawn much attention over the past few years, owing to their wide range of potential applications. However, a convenient and effective method to prepare such blends with superior mechanical and tribological properties is still lacking. In this work, we propose a promising approach that uses melt-processable PTFE (MP PTFE), instead of conventional PTFE, to prepare anti-wear blends. MP PTFE, with melt flow abilities under appropriate conditions, can disperse homogeneously in PEEK, enhancing both the mechanical and tribological properties of the PEEK/PTFE blend. To prove this postulation, in this work, both MP PTFE and commercial PTFE were blended with PEEK, separately, and the effects of PTFE type and content on the tensile and tribological properties of the blends were studied. The results showed that, although the addition of commercial PTFE to PEEK could increase the wear resistance, it decreased the tensile strength of PEEK significantly. Compared to the blends with commercial PTFE, the blends with MP PTFE exhibited better tribological performance and higher tensile strength for PTFE content below 10 wt%. It was confirmed that the better dispersion of MP PTFE in PEEK endowed the blends with higher tensile strength. The surface analysis indicated that the MP PTFE could readily migrate to and enrich the surfaces of the blends. The relatively high PTFE content on the surface favored the formation of tribo-films, enhancing the tribological properties of the blends.

scholarly journals Mechanical and tribological properties of nano-sized Al2O3 particles on ADC12 alloy composites with Strontium modifier produced by stir casting method

2021 ◽  
Vol 3 (1) ◽  
pp. 9-20
Author(s):  
Muhammad Wira Akira ◽  
Hanuna Haritsah ◽  
Anne Zulfia ◽  
Ekavianti Prajatelistia
Keyword(s):  
Tribological Properties ◽  
High Performance ◽  
Spinel Phase ◽  
Stir Casting ◽  
Grain Refiner ◽  
Interface Area ◽  
Alloy Matrix ◽  
Mechanical And Tribological Properties ◽  
Al2o3 Particles ◽  
Microstructure Modifier

Nano-Al2O3 particles were incorporated into ADC12 alloy with the addition of Al-5Ti-B, Al-Sr, and Mg to achieve high performance in mechanical and tribological properties. In this study, varied nano-Al2O3 was used from 0.25 vf-% to  0.5 vf-% through stir casting methods to discover the optimum amount to obtain high performance. Besides, the inclusion of grain refiner Al-5Ti-B and microstructure modifier Al-Sr is expected to improve performance to the next level. However, porosity and agglomeration still be a concern in Aluminum alloy matrix composite fabrication. The presence of spinel phase MgAl2O4 in the interface area between nano-Al2O3 particles and ADC12 alloy is relied upon to minimize this porosity and agglomeration issue. The optimum of tensile strength and hardness was found at 0.35 vf-% Al2O3 and wear rate at 0.4 vf%. Although, the optimum point of wear found at 0.4 vf%, porosity began to increase at 0.4 vf% as well. As a result, 0.35 vf% addition of the nano-Al2O3 gives the best performance for the composite.

The synergistic effect of SiC/R-GO composite on mechanical and tribological properties of thermosetting polyimide

2021 ◽  
pp. 002199832110492
Author(s):  
Aijiao Li ◽  
Suoxiao Wang ◽  
Zhe Chen ◽  
Hong Liu ◽  
Hongding Wang
Keyword(s):  
Friction Coefficient ◽  
Wear Rate ◽  
Tribological Properties ◽  
High Performance ◽  
In Situ Polymerization ◽  
Effective Means ◽  
Compression Modulus ◽  
Nanocomposite Films ◽  
Mechanical And Tribological Properties ◽  
Industry Applications

The effective means to solve material wear is to develop self-lubricating composite materials with excellent tribological, thermal, and mechanical properties. Herein, the composites of reduced graphene oxide (r-GO) nanosheet decorated with Silicon Carbide (SiC) were facilely prepared with employing a silane coupling agent, and the corresponding r-GO/SiC/thermosetting polyimide (r-GO/SiC/TPI) nanocomposite films were obtained by in situ polymerization method. The mechanical, tribological, and thermal properties of these nanocomposite films were investigated. When the content of r-GO/SiC was at 1.0 wt%, the compression strength and compression modulus of the composite increased by 37.7% and 47.3%, respectively, which were much higher than that of TPI composites addition of r-GO or SiC alone. Furthermore, r-GO/SiC/TPI composites also exhibited the lowest wear rate and friction coefficient in these reinforced TPI nanocomposites. When the content of r-GO/SiC was 0.8 wt%, particularly, the friction coefficient and wear rate of r-GO/SiC/TPI decreased by 22.8% and 79.8% compared to pure TPI, respectively. Additionally, trace amount r-GO/SiC hybrids also significantly enhance the thermal stability of TPI matrix. Compared to the polyimide composites reinforced by common nano-scale inorganic fillers, the outstanding mechanical and tribological properties of this r-GO/SiC/PI composites could be attributed to the ball on plane structure of GO/SiC, which lead to crack reflection, strength increment. These r-GO/SiC/TPI composites demonstrate the promising potential to be used as high-performance tribological materials in industry applications.

Mechanical and tribological properties of sputter deposited nanostructured Cr–WS2 solid lubricant coatings

2010 ◽  
Vol 205 (7) ◽  
pp. 1937-1946 ◽  
Author(s):  
B. Deepthi ◽  
Harish C. Barshilia ◽  
K.S. Rajam ◽  
Manohar S. Konchady ◽  
Devdas M. Pai ◽  
...  
Keyword(s):  
Tribological Properties ◽  
Solid Lubricant ◽  
Mechanical And Tribological Properties ◽  
Sputter Deposited

The Research on the Tribological Properties of C/C Composites

2011 ◽  
Vol 287-290 ◽  
pp. 675-678 ◽  
Author(s):  
Wen Xia Wang
Keyword(s):  
Carbon Fiber ◽  
Tribological Properties ◽  
Thermal Gradient ◽  
High Performance ◽  
Sliding Wear ◽  
Chemical Vapor ◽  
Chemical Vapor Infiltration ◽  
Three Point Bending ◽  
Mechanical And Tribological Properties ◽  
Wear Tests

The mechanical and tribological behaviors of the carbon/carbon (C/C) composites were evaluated by three-point bending and sliding wear tests. The effect of carbon fiber content on their mechanical behavior was also investigated. To produce the C/C composites, the precursor was introduced to the preforms by impregnating with phenolic solution. The C/C preforms were densified by thermal gradient chemical vapor infiltration. Results indicated that, the C/C composites show excellent mechanical and tribological properties. A kind of high performance brake materials was obtained.

Mechanical and tribological properties of solid lubricant composites based on thermoplastic polyimide loaded with PTFE and surface modified carbon fibers

2020 ◽  
pp. 394-400
Author(s):  
S.V. Panin ◽  
Lo Jiangkun ◽  
D.G. Buslovich ◽  
V.O. Aleksenko ◽  
L.A. Kornienko
Keyword(s):  
Mechanical Properties ◽  
Carbon Fibers ◽  
Tribological Properties ◽  
Silane Coupling Agent ◽  
Solid Lubricant ◽  
Physical And Mechanical Properties ◽  
Mechanical And Tribological Properties ◽  
Micron Size ◽  
Silane Coupling ◽  
Surface Modified

The mechanical and tribological properties of thermoplastic polyimide based composites loaded with polytetrafl uoroethylene and milled carbon fibers, annealed and functionalized with a KH550 silane-coupling agent were studied. It has been revealed that, compared with neat PI, the composite with annealed carbon fibers and PTFE particles possessed the highest wear resistance. Reinforcing carbon fibers of hundreds micron size increase the elastic modulus by 2 times; while all other physical and mechanical properties remain at the level of unfilled PI.

Sign in / Sign up

Export Citation Format

Share Document