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Technical Paper

Magnetic Field Sensor of Graphene for Automotive Applications

2017-03-28
2017-01-1633
To satisfy demand, we have developed a graphene Hall sensor that senses magnetic fields by the Hall effect. The sensitivity of a Hall sensor is proportional to the carrier mobility, and graphene has an extremely high carrier mobility compared with conventional materials like Si, GaAs and InSb. ...The sensitivity of a Hall sensor is proportional to the carrier mobility, and graphene has an extremely high carrier mobility compared with conventional materials like Si, GaAs and InSb. ...The sensitivity of a Hall sensor is proportional to the carrier mobility, and graphene has an extremely high carrier mobility compared with conventional materials like Si, GaAs and InSb. Thus, graphene Hall sensors are expected to give high sensitivity that will enable sensing of the Earth’s magnetic field.
Technical Paper

Graphene Coating as a Corrosion Protection Barrier for Metallic Terminals in Automotive Environments

2021-04-06
2021-01-0354
All tested cases confirm that graphene layer substantially reduces corrosion rate compared with the samples with no graphene coating. ...Currently, various thin metallic layers such as gold (Au), silver (Ag), or tin (Sn) are plated with a nickel (Ni) layer on copper alloy (Cu) terminals to ensure reliable electrical conduction during service. Graphene due to its excellent chemical stability can serve as a corrosion protective layer and prevent electrochemical oxidation of metallic terminals. ...In this work, effects of thin graphene layers grown by plasma-enhanced chemical vapor deposition (PECVD) on Au and Ag terminals and thin-film devices were investigated.
Technical Paper

Friction Force Reduction for Electrical Terminals using Solution-Processed Reduced Graphene Oxide Coating

2021-04-06
2021-01-0348
We have previously shown that plasma-enhanced chemical vapor deposition (PECVD) of graphene on gold (Au) and silver (Ag) terminals can significantly reduce the insertion force (friction force during the terminal insertion process). ...In this study, reduced graphene oxide was prepared using a low-cost solution process and applied onto metallic terminals. ...The reduced graphene oxide (rGO) suspended in polyalphaolefin (PAO) base oil was coated on Sn terminals via a dip-coating method.
Journal Article

Influence of Graphene Nanoplatelets Addition on Microstructural and Mechanical Properties of Pure Aluminum through Ultrasonic-Assisted Stir Casting Technique

2021-07-06
Abstract Using an ultrasonic-assisted stir casting method, a pure aluminum (Al) matrix (99% purity) was mixed with Graphene Nanoplatelets (GNPs) in various proportions ranging from 0.5 wt.% to 2.0 wt.% to create a Metal Matrix Composite. ...The microstructural and mechanical behavior of pure Al-graphene composites were studied experimentally, and it was discovered that Al with 1.0 wt.% graphene composite exhibits improved mechanical properties, with a 38.80% increase in tensile strength and a 56.07% increase in microhardness. ...According to the failure review, uniform graphene scattering in the parent matrix combined with negligible porosity resulted in a substantial improvement in mechanical properties, making it ideal for aerospace applications.
Technical Paper

Vacua Buoyancy Is Provided by a Vacuum Bag Comprising a Vacuum Membrane Film Wrapped Around a Three-Dimensional (3D) Frame to Displace Air, on Which 3D Graphene “Floats” a First Stack of Two-Dimensional Planer Sheets of Six-Member Carbon Atoms Within the Same 3D Space as a Second Stack of Graphene Oriented at a 90-Degree Angle

2010-11-02
2010-01-1784
In Figures 3-5, 3D graphene "floats" a first stack of two-dimensional (2D) planar sheets of six-member carbon atoms within the same 3D space as a second stack of graphene oriented at a 90° angle. 3D graphene atomic trap nanomembranes in Figure 3 that ring link six-member carbon atoms together maintain an extremely high vacuum for the greatest buoyancy of a Vacua Dirigible. 3D graphene atomic trap nanomembranes can become an extremely high pressure air beam where no other material is as thin, strong, flexible, electrically conductive, and gastight. ...New graphite ultrathin nanomembranes made of layered graphene make vacuum bags gastight. An electric swing cycle is applied across nanomembranes to reduce air density on selected outside dirigible surfaces to gracefully control buoyancy. ...These thirty-two vacuum bags are manufactured from gastight six-member carbon molecules of graphene arrayed into composite ultrathin nanomembranes. Each surface of the hexagon vacuum bags gastight nanomembranes are individual electric circuits.
Article

Graphene composites for cars

2014-10-03
Polymer composites reinforced with the "wonder material" graphene could cut structural weight by a third or more, researchers claim.
Event

Live Recording: Graphene Tutorial: How Advanced Materials Are Helping to Tackle New Mobility Challenges

2021-04-14
In this session you will hear from The Graphene Council and leading companies in the sector about how graphene is being used today in the automotive sector and applications that are in the prototyping and development stage. ...Graphene and other advanced materials are enabling engineers and designers to approach an extremely broad array of mobility challenges, from light-weighting to energy storage, from the increasing use of sensors to improving coatings, and from thermal management solutions to improving the driver and passenger experience. ...Learn how graphene allows you to tackle your performance goals and solve engineering challenges.
Technical Paper

Recent Advances in Swelling Resistance of Graphene-Based Rubber Compounds

2020-04-14
2020-01-0769
Recently, graphene has attracted both academic and industrial interest because it can produce a dramatic improvement in properties at very low filler content. ...This review will focus on the latest studies and recent progress in the swelling resistance of rubber compounds due to the addition of graphene and its derivatives. This work will present the state-of-the-art in this subject area and will highlight the advantages and current limitations of the use of graphene for potential future researches. ...This work will present the state-of-the-art in this subject area and will highlight the advantages and current limitations of the use of graphene for potential future researches.
Magazine

Automotive Design: Jan/Feb/March 2015

2015-03-25
Bringing it all together Ian Adcock catches up with GKN's newly appointed president, Group Technology, Rob Rickell. Graphene Supreme Ian Adcock discovers what role graphene is likely to play in the vehicles of tomorrow.
Technical Paper

Tribological Properties Evaluation of Newly Developed Friction Material for Automotive Disc Brake Pad

2020-09-25
2020-28-0511
The prepared seven samples (BP01- Graphite, BP02- MoS2, BP03- Graphite &MoS2, BP04- Graphene, BP05- Graphene & Graphite, BP06 - Graphene & MoS2, BP07 - Graphene, Graphite & MoS2) were tested in pin and disc machine and compared to investigate the coefficient of friction, wear resistance followed by hardness test and thermal degradation analysis. ...The friction materials were made in the form of cylindrical pin from three different solid lubricants - graphite, molybdenum disulfide (MoS2) and graphene - keeping the other ingredients fixed. The prepared seven samples (BP01- Graphite, BP02- MoS2, BP03- Graphite &MoS2, BP04- Graphene, BP05- Graphene & Graphite, BP06 - Graphene & MoS2, BP07 - Graphene, Graphite & MoS2) were tested in pin and disc machine and compared to investigate the coefficient of friction, wear resistance followed by hardness test and thermal degradation analysis.
Technical Paper

Mechanical and Microstructures Investigation of Stir Casted Aluminium Alloy 8011-Graphene Composites

2020-09-25
2020-28-0427
The test results revealed that compared to pure AA8011 matrix, AA8011/0.5 wt. % Graphene composite had better mechanical properties such as tensile strength and hardness. Micrographic/Fractography analysis by Scanning Electron Microscopy (SEM) and X-ray Diffraction (XRD) analysis confirm that uniform distribution of Graphene in AA8011 matrix and low porosity in the microstructure lead a substantial improvement in mechanical properties such as tensile strength and micro hardness of AA8011/0.5 wt. % Graphene composite compared to other AA8011/Graphene composites prepared with different weight percentages. ...Micrographic/Fractography analysis by Scanning Electron Microscopy (SEM) and X-ray Diffraction (XRD) analysis confirm that uniform distribution of Graphene in AA8011 matrix and low porosity in the microstructure lead a substantial improvement in mechanical properties such as tensile strength and micro hardness of AA8011/0.5 wt. % Graphene composite compared to other AA8011/Graphene composites prepared with different weight percentages. ...Micrographic/Fractography analysis by Scanning Electron Microscopy (SEM) and X-ray Diffraction (XRD) analysis confirm that uniform distribution of Graphene in AA8011 matrix and low porosity in the microstructure lead a substantial improvement in mechanical properties such as tensile strength and micro hardness of AA8011/0.5 wt. % Graphene composite compared to other AA8011/Graphene composites prepared with different weight percentages.
Technical Paper

A Comparative Study on Microstructures and Mechanical Properties of Al-GNPs Composites Fabricated by Casting Method

2019-10-11
2019-28-0139
This paper describes an investigation on microstructures as well as mechanical properties of pure aluminium graphene nano platelets (GNPs) metal matrix composites prepared via novel based stir casting technique combined with ultrasonic treatment. ...The proportion of graphene changes from 0.5 to 2.0 wt. % in aluminium with 99% purity. The investigations on composites revealed that Al with combination of 1.0 % graphene composite showcased enhanced mechanical properties with 48.49 % (~49%) increase in tensile strength and 34.53 % (~35%) increase in micro hardness compared to test results of composites produced by traditional stir casting technique. ...The investigations on composites revealed that Al with combination of 1.0 % graphene composite showcased enhanced mechanical properties with 48.49 % (~49%) increase in tensile strength and 34.53 % (~35%) increase in micro hardness compared to test results of composites produced by traditional stir casting technique.
Technical Paper

Impact of the Injection Strategy on Soot Reactivity and Particle Properties of a GDI Engine

2020-04-14
2020-01-0392
In addition, the nanostructure analysis of primary particles (graphene layer length, tortuosity and separation distance) was also investigated by using high resolution transmission microscopy (HRTEM) and an image analysis algorithm. ...Such primary particles are characterized by short mean graphene layer length (Lmean ≈ 0.5 nm) and an unordered configuration resulting in an increased separation distance (Dmean ≈ 1 nm). ...Conversely, inhomogeneous mixtures result in increased formation of primary particles showing long, extended and more ordered graphene (Lmean ≈ 0.55 nm, Dmean = 0.4 nm), which in turn lead to low soot reactivity (Tmax ≈ 615°C).
Journal Article

Efficient Supercapacitors Based on Co9S8/Graphene Composites for Electric Vehicles

2018-04-03
2018-01-0440
In this article, Co9S8 nanoparticles were embedded in reduced graphene oxide (rGO) via a simple anneal approach as high efficient and stable electrodes for SCs. ...The Co9S8 nanoparticles were inserted tightly between the rGO layers due to strong intermolecular forces, preventing the cluster in reduction process of rGO from graphene oxide (GO). The rGO provides the conductive network for Co9S8 and shortens the ion diffusion paths, improving rate performance and enhancing the stability of the electrode material.
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