Magnetic Compaction Pressure
Magnetic Compaction Pressure - Related Videos
09:41
Magnet Assisted Composite Manufacturing: A Flexible New Technique for Achieving High Consolidation Pressure in Vacuum Bag/Lay-Up Processes
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Cited by 5 •
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A new technique for applying consolidation pressure on the vacuum bag lay-up to fabricate composite laminates is described. The goal of this protocol is to develop a simple, cost-effective technique to improve the quality of laminates fabricated by the wet lay-up vacuum bag method.
01:27
Compact Bone
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2025
Most bones contain compact and spongy osseous tissue, but their distribution and concentration vary based on the bone's overall function. Compact bone, also called cortical bone, is the denser, stronger of the two types of bone tissue. It is found under the periosteum and in the diaphyses of long bones, where it provides support and protection. The microscopic structural unit of compact bone is called an osteon, or haversian system. Each osteon is composed of concentric rings of calcified...
01:22
Compacting Factor test
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2024
The compacting factor test is a method used to assess the workability of concrete. It is especially suitable for concrete mixes containing aggregates up to one and a half inches in size. This test involves specialized equipment consisting of two truncated cone-shaped hoppers and a cylinder, all with polished interior surfaces to minimize friction. The procedure begins by placing concrete into the upper hopper without any compaction. Once filled, the bottom door of this hopper is opened,...
07:26
Synthesis and Microdiffraction at Extreme Pressures and Temperatures
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Cited by 5 •
2013
The laser heated diamond anvil cell combined with synchrotron micro-diffraction techniques allows researchers to explore the nature and properties of new phases of matter at extreme pressure and temperature (PT) conditions. Heterogeneous samples can be characterized in situ under high pressure by 2D mapping and combined powder, single-crystal and multigrain diffraction approaches.
05:32
A High-performance Compact Photoacoustic Tomography System for In Vivo Small-animal Brain Imaging
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Cited by 11 •
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A compact pulsed-laser diode-based photoacoustic tomography (PLD-PAT) system for high-speed in vivo brain imaging in small animals is demonstrated.
FAQs
The pressure arises from a coupled electromagnetic sequence. A rapidly changing current produces a magnetic field, which induces eddy currents in a conductive workpiece or driver. Interaction between those currents and the field generates Lorentz forces. In a compaction setup, those forces act transiently, converting electrical excitation into the short-duration mechanical loading needed for powder densification.
The conductive workpiece or driver provides the path through which eddy currents form, while the die confines the powder during loading. Their arrangement determines how the transient electromagnetic force is transferred to the powder rather than relying entirely on direct tooling contact. This separation supports compaction configurations that limit tooling contact while maintaining a defined component shape.
Compared with conventional mechanical loading, magnetic compaction pressure applies force without requiring the same degree of direct contact between the loading system and the material. That contactless characteristic can reduce tooling contact and support near-net-shape production. The approach is therefore relevant when engineers seek dense parts while controlling the effects of conventional mechanical tooling.
Electrical conductivity is central to pulsed electromagnetic compaction because the changing field induces eddy currents in a conductive workpiece or driver. This differs from the broader use of magnetic fields to shape magnetically responsive materials, where the material’s response to the field is the relevant consideration. The distinction helps engineers select a suitable compaction configuration.
A typical sequence places powder inside a die, positions a conductive workpiece or driver as part of the electromagnetic arrangement, and applies a rapidly changing current. The resulting field and induced eddy currents generate Lorentz forces, producing transient compression. Performing this loading within the die allows the process to target shaped powder components with controlled geometry.
Magnetic compaction pressure is relevant to powder metallurgy and the consolidation of advanced materials. It can also support fabrication of parts with controlled density or complex geometries. These applications connect the electromagnetic loading mechanism to manufacturing goals: increasing powder packing and producing dense, near-net-shape components while reducing reliance on extensive tooling contact.
Engineers can seek improved particle packing, dense components, near-net-shape forms, and controlled density. These outcomes make the approach useful when dimensional form and material consolidation must be addressed together. In practice, the method links transient electromagnetic loading with the production of shaped parts whose density and geometry are important design requirements.