Search Results for graphene

Raman spectroscopy is an indispensable tool in laboratories conducting research in the nascent field of carbon nanomaterials. It provides comprehensive information about the structure and layer thickness of graphene samples with high levels of sensitivity, stability, and control.

Harnessing graphene's potential for commercial use requires attaining homogeneous dispersion and strong chemical bonding with the matrix of a target material. This can be achieved by effective surface modification. This article discusses approaches to graphene surface modification and includes a case study for using graphene as a filler to improve the mechanical properties of polymer composites.

From graphene to next-generation composites to 3D printing, advanced materials and processes are helping sportswear manufacturers, sporting goods companies, and sports medicine practitioners take their game to the next level. This special report reviews some of the most innovative technologies making an impact on today’s sports and recreation industry. Technologies addressed include graphene used in sportswear, new production methods for carbon fiber composites, and 3D printed implants to address knee injuries.

Optimizing the integrity and performance of highly engineered surfaces and structures requires the ability to visualize and understand material behavior over multiple length and time scales from a three-dimensional perspective. The Electron Microscopy Centre at the University of Manchester is equipped for such work as demonstrated in problem-solving scenarios involving multiscale imaging and analysis of the progression of intergranular corrosion in Al alloy 2024, the catalytic effect of silver nanoparticles in seawater, recrystallization in a volume element of a bronze alloy, and defect progression on graphene surfaces.

New electrical, mechanical, and chemical testing capabilities give scanning electron microscopes the feel of a self-contained “nano-laboratory.” Several developments in SEM technology allow new and more flexible approaches to the analysis of novel systems, such as Li battery-related materials, nanostructured and nanoporous materials, and novel approaches to 3D analysis.

Beyond automotive, aerospace, and medical materials innovations, research and development of advanced materials and processes for sports and recreation activities is one of the most exciting areas for today’s materials scientists and engineers. This article compiles examples of materials innovations in equipment for cycling, ice skating, cricket, running, football, sailing, and fishing.

Moisture-electric energy transformation (MEET) technology is being developed to further expand the utilization of environmental energy sources like thermal power, wind power, hydropower, and solar energy. The goal of the MEET technology is to extract power from environmental moisture with as few conversion processes as possible to satisfy the ever-growing demand for new and more portable energy sources The use of cold spray to produce MEET devices results in a greener process. While the suitability of polyether ether ketone as a MEET material was proven and the deposition of PEEK using cold gas dynamic spray (CGDS) was achieved, additional work is needed to fully characterize the manufacturing of PEEK-based MEET devices via CGDS.

A recently discovered nanocarbon phase, first imaged to atomic resolution in 2012, is being exploited to increase the electrical and thermal conductivity of metals and alloys. These unique materials, known as carbon covetic nanomaterials or covetics for short, represent an opportunity to improve energy efficiency over a wide range of applications using low-cost raw materials and scalable processes. This article briefly describes the structure, properties, and potential applications for covetics.

Recent advances in the development of self-healing polymers enhance the longevity of energy harvesting and storage devices.

Improving the mechanical properties and wear resistance of polymers used as implant bearing materials requires new approaches and modern technology. This article describes recent work on translating novel materials and coatings into clinical practice to reduce risks and significantly improve orthopedic implant fixation and longevity.

Because the photopolymerization of gelatin methacrylate can be spatially and temporally controlled, it can be fabricated into hydrogels well suited to a variety of biomedical applications.

Corrosion is commonly defined as the deterioration of a material or its properties because of a reaction with its environment. It is a natural process due to a high energy state induced in metals and alloys during refining, processing, and manufacturing. Modern methods for preventing and controlling corrosion can reduce or eliminate its impact on public safety, the economy, and the environment. New technologies push materials to withstand increasingly demanding conditions as a result of higher temperatures and pressures, and environments with greater corrosivity. Therefore, the risks of new types of corrosion failures need to be considered along with methods to avoid them, as described in this article.

Custom equipment designed for the deposition of exotic materials allows advanced coating solutions and ceramic matrix composites to be utilized for applications in automotive, aerospace, defense, energy, and the farthest reaches of space. This article describes custom systems for chemical vapor deposition and advanced materials processing.

News about ASM members, chapters, events, awards, conferences, affiliates, and other society activities. Topics include: ASM President Christopher Berndt visit to India; Prof. Thaddeus B. Massalski receives the 2012 J. Willard Gibbs Phase Equilibria Award; volunteer profile for Mario Epler, Carpenter Technology Corporation.

A brief literature review and case study explore the effect of particulate reinforcements and processing parameters on the tribological behavior of polymer matrix composites made by 3D printing via fused filament fabrication.

To learn about the latest trends in advanced materials, we turned to four of ASM’s thought leaders: John Ågren, KTH Royal Institute of Technology; George T. (Rusty) Gray III, Los Alamos National Laboratory; Jennie S. Hwang, H-Technologies Group; and David K. Matlock, Colorado School of Mines. This article presents their perspectives on the future of engineered materials, key areas of opportunity, and what ASM can do to support the next generation of materials scientists and engineers.

Both shape memory and elastocaloric effects are related to the reversible martensitic phase transformation. For the shape memory effect, thermal energy is used to drive the material through the phase transformation and recover its original shape. For the elastocaloric effect, mechanical energy is used to induce phase transformation, and the associated latent heat is used to pump heat for cooling or heating. Heat pumps based on the elastocaloric effect have a low environmental impact and are highly efficient. However, designing a prototype to harvest the full potential of the elastocaloric effect has been challenging. This article summarizes prototyping efforts undertaken by three different research groups.

Efforts are underway in every sector of the scientific community to explore and develop possible strategies and solutions to counter sea level rise and climate change. This article discusses long-term approaches including various methodologies to convert CO 2 greenhouse gas released from burning fossil fuels to other forms of fuel and value-added products, thus mitigating climate change and its associated effects, including sea level rise.

Automotive manufacturers are making significant investments in the design and development of bioplastics and biocomposites-based components.

Melt-injection of organic precursors may result in revolutionary technologies for producing ceramic reinforced metal-matrix composite castings.