PRODWAYS PREZINTEAZĂ NOUA IMPRIMANTA CERAMICĂ 3D MOVINGLIGHT® V10 LA EXPOZIȚIA MATERIALĂ A ADITIVILOR 2018 DIN CHINA

Prodways va prezenta noua imprimantă în previzualizare pe piața chineză la Expoziția de aditivi pentru materiale 2018 din Xi’An, China, în perioada 6 – 8 septembrie 2018. Piața chineză reprezintă cea mai mare piață de ceramică. Cu această ocazie, Prodways anunță și primele două vânzări ale noului său MOVINGLight® V10 către doi clienți chinezi care au comandat deja mașina ca parte a unui program „Early adopter”, care le permite să testeze tehnologia

Prodways-presents-its-new-MOVINGLight®-V10-ceramic-3D-printer

NOUA IMPRIMANTA CERAMICĂ 3D MOVINGLIGHT

Stiinta din spatele celui mai usor ceas de grafina din lume a dezvaluit(Science behind world’s lightest graphene watch revealed)

Cantitatea mică de grafen utilizat a fost adăugată la un compozit cu fibră de carbon cu scopul de a îmbunătăți rigiditatea și de a reduce greutatea prin utilizarea unui material mai puțin general. Deoarece grafenul are un nivel ridicat de rigiditate și rezistență, utilizarea acestuia ca armătură în compozitele polimerice prezintă un potențial imens de îmbunătățire a proprietăților mecanice ale compozitelor.

Posted: Aug 29, 2018

Science behind world’s lightest graphene watch revealed

(Nanowerk News) In January 2017 the world’s lightest mechanical chronograph watch was unveiled in Geneva, Switzerland, showcasing innovative composite development by using graphene. Now the research behind the project has been published. The unique precision-engineered watch was a result of collaboration between The University of Manchester, Richard Mille Watches and McLaren Applied Technologies.
The RM 50-03 watch was made using a unique composite incorporating graphene to manufacture a strong but lightweight new case to house the watch mechanism which weighed just 40 grams in total, including the strap.
The RM 50-03 watch
The RM 50-03 watch.
The collaboration was an exercise in engineering excellence, exploring the methods of correctly aligning graphene within a composite to make the most of the two-dimensional materials superlative properties of mechanical stiffness and strength whilst negating the need for the addition of other, weightier materials.
Now the research behind this unique watch has been published in the journal, Composites Part A: Applied Science and Manufacturing („Realising the Theoretical Stiffness of Graphene in Composites through confinement between Carbon Fibres”). The work was primarily carried out by a group of researchers at The University of Manchester’s National Graphene Institute.
Leading the research Professor Robert Young said: “In this work, through the addition of only a small amount of graphene into the matrix, the mechanical properties of a unidirectionally-reinforced carbon fibre composite have been significantly enhanced.
“This could have future impact on precision-engineering industries where strength, stiffness and product weight are key concerns such in as aerospace and automotive.”
The small amount of graphene used was added to a carbon fibre composite with the goal of improving stiffness and reducing weight by requiring the use of less overall material. Since graphene has high levels of stiffness and strength, its use as a reinforcement in polymer composites shows huge potential of further enhancing the mechanical properties of composites.
The final results were achieved with only a 2% weight fraction of graphene added to the epoxy resin. The resulting composite with graphene and carbon fibre was then analysed by tensile testing and the mechanisms were revealed primarily by using Raman spectroscopy and X-ray CT scans.
The benefits of this research demonstrate a simple method which can be incorporated into existing industrial processes, allowing for engineering industries to benefit from graphene mechanical properties, such as the manufacture of airplane wings or the body work of high-performance cars.
The research group discovered that when comparing with a carbon fibre equivalent specimen, the addition of graphene significantly improved the tensile stiffness and strength. This occurred when the graphene was dispersed through the material and aligned in in the fibre direction.
Dr Zheling Li, a University of Manchester Research Associate said: „This study presents a way of increasing the axial stiffness and strength of composites by simple conventional processing methods, and clarifying the mechanisms that lead to this reinforcement.”
Aurèle Vuilleumier R&D Manager at Richard Mille said: “This project is a perfect example of technology transfer from the university to the product. The partnership with McLaren Applied Technologies allows a broad diffusion of graphene-enhanced composites in the industry. As a tangible result, a world record light and strong watch was available for our customers: the RM 50-03.”
Dr Broderick Coburn, Senior Mechanical Design Engineer at McLaren Applied Technologies said: “The potential of graphene to enhance composites’ structural properties has been known and demonstrated at a lab-scale for some time now. This application, although niche, is a great example of those structural benefits making it through to a prepreg material, and then into an actual product.”
The University of Manchester will soon be celebrating the opening of its second world-class graphene facility, the Graphene Engineering Innovation Centre (GEIC), set-to open later this year. The GEIC will allow industry to work alongside academic expertise to translate research into prototypes and pilot production and accelerate the commercialisation of graphene.
Source: University of Manchester

Cercetatorii dezvolta o metoda pentru mascarea nano-senzori pentru optica si biomedicina(Researchers develop a method for cloaking nano-sensors for optics and biomedicine)

a dezvoltat un model de metamaterial nou, care va îmbunătăți acuratețea nano-senzorilor în optică și biomedicină prin mascarea acestora din exterior radiații.Dezvoltarea unui nou metamaterial de cloaking pentru nano-senzori se realizează în cadrul proiectului italian-rus ANASTASIA (Anatolii invizibile avansate care nu împrăștie radiant și susțin anapoli invizibili).

Posted: Aug 28, 2018

Researchers develop a method for cloaking nano-sensors for optics and biomedicine

(Nanowerk News) An international research group of scientists from Politecnico di Torino (Italy) and NUST MISIS (Russia) has developed a model of a new metamaterial, which will improve the accuracy of nano-sensors in optics and biomedicine by cloaking them from external radiation.
The article reporting the results has been recently published in Scientific Reports („Multipolar passive cloaking by nonradiating anapole excitation”).
The development of a new cloaking metamaterial for nano-sensors is carried out within the framework of the Italian-Russian project ANASTASIA (Advanced Non-radiating Scattering Tenuously Architectures And Sustaining Invisible Anapoles).
Visualization of a metamolecule, consisting of a PEC cylinder and four dielectric cylinders around
Figure 1: Visualization of a metamolecule, consisting of a PEC cylinder and four dielectric cylinders around. P stands for electric dipole moment of the conductor and T stands for toroidal moment of the dielectric coating
The aim of the project is to model and then prototype a metamaterial, which will make nano-scale objects invisible in the uncovered THz frequency range.
On the part of Politecnico di Torino, Professor Ladislau Matekovits heads the research group, while Professor Alexey Basharin leads the Russian team. In the research, 4 PhD students and other young professionals are also involved.
A cylinder of perfect electric conductor (PEC) with radius r=2.5 µm has been considered in order to imitate a nano-sensor. Being metallic, it possesses very high wave scattering, allowing to carry out calculations for the maximum possible level of re-radiation. The modeling was performed in THz range, which stands between infrared and microwave bands.
The key element of the new metamaterial is a metamolecule (Fig. 1), consisting of four dielectric lithium tantalate (LiTaO3) cylinders, r=5 µm. Serving as a coating for a nano-sensor, dielectrics interact with radiation, exciting non-radiating anapole mode. Separated from each other, all the elements radiate and distort the electric and magnetic fields (Fig. 2 a, b), but when considered all together the object becomes invisible for an external observer (Fig. 2 c).
Visible radiation of elements
Figure 2: Visible radiation of elements, where (a) is the central element without coating; (b) is coating elements without a central element; © is metamolecule: central element in the coating.
Apart from the used LiTaO3, depending on the field of application, other materials can be considered. For example, in nano-optics it would be possible to work with silicon and germanium, while in biomedical sensoring biocompatible sodium chloride would be a possible alternative.
The next research stage, which is the experimental characterization of a prototype of the proposed structure in vitro, is scheduled for this autumn.
Concurrently, interests in creating configurations by using proper materials, e.g., graphene, and geometrical arrangements that are only transparent at certain wavelengths and/or angles of incidence are targeted. The challenge set by scientists from Politecnico di Torino and NUST MISIS is to generalize the experience to develop a theory which can be used to model and then assemble metamaterials that will cloak nano-scaled objects at all the wavelengths and at any angles.
Source: National University of Science and Technology MISIS

Rusia testează armura de putere a robocopului care îi permite soldaților să tragă mitralierele cu o singură mână(Russia tests’robocop’ power armor enabling soldiers to fire machine-guns with one hand)

Un exoskeleton acționat cu motoare electrice integrate și o baterie de stocare testată în Rusia va permite militarilor să lovească cu precizie țintele cu o mitralieră ținută cu o singură mână

Russia tests

Reducerea fricțiunii cu un material de carbon de tip ceapă(Reducing friction with an onion-like carbon material)

În 2015, o echipă de la Argonne National Laboratory a creat un material cu super-lubricitate (aproape zero la frecare) la scară inginerească. Materialul conține grafen și diamante extrem de mici. Echipa a înlocuit grafenul cu disulfură de molibden. Disulfura de molibden provoacă o reacție care transformă diamantele în carbon de tip ceapă.Materialul este un lubrifiant auto-generat, care se reglează continuu, determinându-l să dureze mai mult decât lubrifianții tradiționali uscați

Posted: Aug 27, 2018

Reducing friction with an onion-like carbon material

(Nanowerk News) In 2015, a team from Argonne National Laboratory created a material with superlubricity (near-zero friction) at engineering scale. The material contained graphene and extremely small diamonds. The team replaced the graphene with molybdenum disulfide. The molybdenum disulfide causes a reaction that turns the diamonds into onion-like carbon.
The result? A self-generating, very low friction dry lubricant. As an added bonus, the material lasts much longer than other solid lubricants.
Atomistic simulations of the chemical mechanism leading to reduced friction
Atomistic simulations of the chemical mechanism leading to reduced friction. a–d: Atomic snapshots from simulations at selected times during the sulfur- (S-) induced amorphization of diamond nanoparticles. e–h: Atomic snapshots from simulations at selected times during the formation of onion-like carbon structures. (Image: Badri Narayanan and Subramanian Sankaranarayanan, Argonne National Laboratory)
Superlubricity—a state in which friction essentially disappears—is a highly desirable property. Automobiles and other mechanical assemblies lose efficiency and wear down due to friction. Scientists developed a new material that achieves superlubricity in dry environments. Potential uses include wind turbine gears, magnetic disc drives in computers, and rotating seals. Argonne National Laboratory has three patents on the superlubricity technology. They have a patent pending on the latest breakthrough. It will soon be available for licensing.
In 2015, a multidisciplinary team from Argonne National Laboratory created a material consisting of graphene, nanodiamond particles, and diamond-like carbon that demonstrated superlubricity at the macroscale for the first time. To inform the design of the material, the researchers coupled laboratory experiments at Argonne’s Tribology Laboratory and Center for Nanoscale Materials (CNM) with large-scale molecular dynamics simulations performed at the Argonne Leadership Computing Facility (ALCF) and the National Energy Research Scientific Computing Center (NERSC).
The team has continued to further develop this lubricant technology. Most recently, they replaced the graphene with molybdenum disulfide to explore the impact of using other two-dimensional materials.
In addition to performing detailed experimental investigations of the new material, the researchers carried out simulations on the ALCF’s Mira supercomputer to elucidate its behavior at the nanoscale. Using the LAMMPS (Large-scale Atomic/Molecular Massively Parallel Simulator) code, the team’s large-scale atomistic simulations revealed molecular insights into a mechanical stress-induced tribochemical reaction that led to superlubricity.
They found that the molybdenum disulfide was breaking up into molybdenum and sulfur and reacting with the nanodiamonds to convert them into onion-like carbon structures, which consist of several layers of spherical graphitic shells that can be used as a dry lubricant.
The material is a self-generating lubricant that re-adjusts itself continuously, causing it to last longer than traditional dry lubricants. The team published their findings in Nature Communications.
To enable the computationally demanding molecular dynamics simulations, ALCF staff collaborated with IBM, Lawrence Berkeley National Laboratory, and Sandia National Laboratories to optimize the performance of LAMMPS for Mira and other many-core architectures.

References
D. Berman, B. Narayanan, M.J. Cherukara, S.K.R.S. Sankaranarayanan, A. Erdemir, A. Zinovev, and A.V. Sumant, “Operando tribochemical formation of onion-like-carbon leads to macroscale superlubricity.” Nature Communications 9, 1164 (2018). [DOI: 10.1038/s41467-018-03549-6]
H.M. Aktulga, C. Knight, P. Coffman, K.A. O’Hearn, T.R. Shan, and W. Jiang, “Optimizing the performance of reactive molecular dynamics simulations for many-core architectures.” The International Journal of High Performance Computing Applications (2018). [DOI: 10.1177/1094342017746221]
Source: U.S. Department of Energy, Office of Science

Tehnologia Rostec Active și Passive Exoskeleton în cadrul lucrărilor pentru programul militar rus Ratnik-3 Future Soldier(Rostec Active and Passive Exoskeleton Technology in the Works for Russian Military Ratnik-3 Future Soldier Program)

Ca și cum camuflaj stealth / camuflajul de înclinare vizuală nu este suficient, contractorul rus militar de apărare, Rostec, tocmai a demonstrat „exoschemele pasive operative”

Rostec Active

Tehnologia Rostec Active și Passive Exoskeleton în cadrul lucrărilor pentru programul militar rus Ratnik-3 Future Soldier(Rostec Active and Passive Exoskeleton Technology in the Works for Russian Military Ratnik-3 Future Soldier Program)

Fabricat din fibră de carbon ușoară, materialul pasiv al exoscheletului îmbunătățește capacitățile fizice ale soldatului (forță, viteză etc.), protejând în același timp coloanei vertebrale și articulațiilor – și este reglabil în înălțime. Aceasta permite soldatului să transporte o greutate suplimentară de până la 50 kg (110,231 lbs) în timpul „marșurilor și atacurilor lungi”.Exoskeletonele pasive sunt complet autonome și nu necesită surse de alimentare, servomotoare, electronice și senzori”.

Rostec Active and Passive Exoskeleton Technology in the Works for Russian Military Ratnik-3 Future Soldier Program

Posted by: David Crane August 26, 2018

As if “stealth camouflage” adaptive camouflage/visual cloaking tech isn’t enough, Russian military defense contractor Rostec just demonstrated “operative passive exoskeletons” for Russian Ratnik-3-type future soldiers/warfighters. Oh, and they’re not done. Rostec is also reportedly developing an active exoskeleton, and they’ve already designed a prototype that’ll be shown at an exhibition, soon. So, it would appear that US military infantry warfighters are going to have their hands full, if World War III (WWIII) ever breaks out, and the Russians are on the opposition.

According to Army Technology, the Rostec passive exoskeleton tech was co-developed by the Central Research Institute for Precision Machine Building (TSNIITOCHMASH), which is part of Russia’s Rostec State, and GB Engineering. Made from lightweight carbon fiber, the passive exoskeleton hardware enhances the soldier’s physical capabilities (strength, speed, etc.), while also protecting his/her spine and joints–and it’s height-adjustable. It enables the soldier to carry up to 50kg (110.231 lbs) extra weight during “long marches and assaults”.

This is the part that intrigues DefenseReview (DR), though:

“The passive exoskeletons are completely autonomous and require no power sources, servomotors, electronics and sensors.”

We’re interested to see how that actually works, and how its capabilities differ from the active exoskeleton tech, which we assume is even more capable in terms of strengh, speed and load-bearing enhancement.

Defense Review will try to glean as much information as possible on Rostec’s active exoskeleton technology, and do a follow-up piece on it. If it weren’t already being used for yogurt, a good name for the technology would be “Activia”–has a nice Russian ring to it.

 

Company Contact Info:

Rostec
24, Usacheva str.
Moscow, 119048
Russian Federation
Phone: +7 (495) 287-25-25
Email: [email protected]
Website: https://rostec.ru