Articles tagged with Grain Boundaries
A researcher at North Carolina State University has created a more efficient method for producing high-density ceramic materials. The new technique, known as selective-melt sintering, allows for the creation of ceramics with no porosity and increased strength in just under a second.
Researchers have made significant progress in understanding the behavior of graphene grain boundaries, which scatter electrons and hinder electronic performance. The study suggests that controlling grain boundary orientation could be key to improving graphene's electronic properties.
Theoretical physicists at Rice University have predicted the formation of conductive sub-nanometer 'wires' in two-dimensional materials, which could lead to advanced electronics. The discovery was made by investigating atomic-scale properties and topological defects in semiconductors.
Researchers at MIT have developed a method to create alloys with extremely tiny grains that remain stable even under high heat. The new material, made of tungsten and titanium, has exceptional strength and impact resistance, making it suitable for various applications.
Ceramics researchers at Lehigh University have obtained unprecedented atomic-scale images of grain boundaries in metals, revealing a bilayer phase transition that weakens the material. This discovery paves the way for scientists to prevent liquid metal embrittlement by strengthening chemical bonds.
Researchers at NIST have identified a class of decorative defects in graphene that could alter its unique properties, including strength and conductivity. The discovery may lead to the development of more resilient materials.
Researchers imaged graphene grain boundaries using diffraction imaging electron microscopy, revealing that impurities are responsible for fluctuating electrical conductivity. Larger grains do not improve conductivity as previously thought, highlighting the importance of controlling impurities in graphene growth.
Researchers at Brown University discovered that grain boundaries in graphene do not compromise the material's strength. The critical bonds along these boundaries can be as strong as those found in pure graphene when tilted at specific angles, enabling the creation of larger sheets with improved properties.
Los Alamos researchers report a mechanism allowing nanocrystalline materials to heal radiation-induced damage through 'loading-unloading' effect at grain boundaries. This discovery provides new avenues for designing highly radiation-tolerant materials for next-generation nuclear energy applications.
Researchers at Johns Hopkins University discovered that certain nanomaterials can move in regions called grain boundaries, leading to changes in their strength and plasticity. This finding has implications for the fabrication of microdevices and integrated circuits, as it may alter the materials' lifespan and performance.
Researchers have developed a new technique to eliminate grain boundary defects in zeolite membranes, significantly improving their ability to separate molecules. By subjecting the membranes to rapid thermal processing (RTP), the defects are eliminated, allowing the membranes to achieve greater yield and energy efficiency.
Researchers at NIST have discovered a striking similarity between the behavior of polycrystalline materials like metals and glasses. The findings could lead to better predictions of material failure and improve understanding of crystal formation.
Researchers at NIST have discovered that reducing mechanical strain at grain boundaries significantly improves high-temperature superconductor performance. By mitigating the effect of granularity, they could enable more efficient electrical transmission lines, increased power grid reliability, and advanced cancer treatment facilities.
Jülich scientists successfully measured atomic spacings down to a few picometres using new methods in ultrahigh-resolution electron microscopy. This allows for the determination of decisive parameters determining physical properties of materials directly on an atomic level in a microscope.
Scientists used a new technique to create a 3D map of stainless steel's grain structure, revealing how cracks grow between grains. The study provides insights into crack growth mechanisms and could lead to more efficient and safer materials.
Researchers at Brown University use a kitchen table physics experiment to study supersolid helium, finding evidence of its behavior in 3 out of 13 trials. The team suggests that a layer of superfluid helium only a single molecule thick forms at grain boundaries, creating a path for movement through the solid.
Carnegie Mellon's Materials Research Science and Engineering Center will focus on creating super-efficient materials, including those with greatly increased strength or resistance to corrosion. The center aims to enable manufacturers to produce smaller, faster computer chips and safer power plants.
Researchers have provided unprecedented insight into the properties of super-hard ceramic materials, which exhibit unusual pliability and potential applications in fields like aerospace and medical implants. The study's findings could lead to the development of stronger materials with improved ductility and control over their properties.
Researchers at Brookhaven National Laboratory found that adding calcium to a high-temperature superconductor increases its ability to carry electric current. The study used a YBCO bicrystal and transmission electron microscope to visualize the effects of calcium doping on grain boundaries, revealing a 35% increase in current flow.
Researchers identified imperfections' preferred location on twin grain boundaries, leading to new strategies to control material properties. Grain size plays a role only when plastic deformation begins, with little effect afterwards.