Key to reducing defects in multi-materials

Materials used in the fields of aerospace, automobiles, medical equipment, and defense need to withstand extremely harsh environments. Small flaws in the materials, such as cracks, can lead to catastrophic consequences and massive economic loss. However, most materials cannot handle such high temperatures and pressures. Multi-materials, like functionally graded materials (FGMs), which combine different materials to produce improved performance, are ideal in this situation.

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One Minute Mentor: Induction Hardening

Spur gears, bevel gears, splined hubs, and cams are ideal components for production using powder metallurgy. Induction hardening is a method to make these parts locally hard and wear-resistant with a tougher ductile matrix.

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Solar Atmospheres of Western PA retains SHARP accreditation

Solar Atmospheres of Western Pennsylvania, Hermitage, has been awarded three years merit status for SHARP Accreditation. The Safety and Health Achievement Recognition Program (SHARP) is designed to recognize employees and employers for their effort in establishing and maintaining all elements of an effective safety and health program.

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Pairing electron microscopy and automatic atom-tracking to reveal more about grain boundaries in metals during deformation

A team of researchers affiliated with multiple institutions in China and the U.S. has found that it is possible to track the sliding of grain boundaries in some metals at the atomic scale using an electron microscope and an automatic atom tracker. In their paper published in the journal Science, the group describes their study of platinum using their new technique.

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Guiding a superconducting future with graphene quantum ‘magic’

Superconductors are attractive for many applications such as loss-less power cables, electric motors and generators, as well as powerful electromagnets that can be used for MRI imaging and for magnetic levitating trains. Now, researchers have detailed the superconducting nature of a new class of superconducting material, magic-angle twisted bilayer graphene.

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Shedding new light on controlling material properties

Materials scientists may soon be able to control material properties with light. A team consisting of researchers at Kyoto University and Kurume Institute of Technology have discovered a scaling law that determines high-order harmonic generation in the solid-layered perovskite material.

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One Minute Mentor: Nitriding

Powder metallurgy parts can be nitrided using alkali salts, gases, and plasmas, with the majority of applications using gases. Alkali salts can be used in some applications, because trapped salts may not be detrimental if the part is constantly immersed in oil during service.

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New strategy for designing thermoelectric materials

The National Institute for Materials Science (NIMS) has succeeded in developing a new approach to the design of thermoelectric materials by constructing a database of electronic structure parameters correlated with materials’ thermoelectric conversion properties and by a comprehensive analysis of the database.

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Unique zentropy theory aims to deliver a universal answer to a materials design challenge

A problem in materials design is that in natural as well as artificial materials, volume occasionally drops, or surges, with rising temperature. While there are mechanical reasons for this occurrence for certain materials, a general insight into why this occasionally occurs is still lacking. However, a group of Penn State scientists has formulated a theory to elucidate and then forecast it: Zentropy.

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