Though hexagonal boron nitride is generally regarded as the most stable boron nitride structure, the relative phase stabilities of boron nitride polymorphs are still under debate. Researchers led by the Japan Advanced Institute of Science and Technology used Monte Carlo simulations to calculate the relative phase stabilities of these polymorphs.
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On March 16, 2022, the National Science Foundation announced the establishment of a Directorate for Technology, Innovation, and Partnerships, its first new directorate in more than 30 years. Learn how this directorate came to be and what still needs to be decided concerning its operations.
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Much research has established how the number of carbon vacancies in zirconium carbide significantly affects the thermodynamic and thermophysical properties. However, little is known about the effects caused by vacancy arrangement. A new open-access review paper summarizes the existing experimental and theoretical studies on these effects.
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For decades researchers have categorized energy storage devices based on whether they behave like a battery or a supercapacitor. An international research team argues that energy storage mechanisms should be viewed as existing on a spectrum instead and that the current binary classification system could hamper development of new technologies.
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Currently, replacing conventional materials with carbon fiber-reinforced polymers typically increases life cycle energy use due to the energy-intensive fiber production process. A new prospective life cycle assessment suggests certain technological developments could lead to carbon fiber composites with lower environmental impact than glass fiber composites.
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Scratch formation on glass surfaces is a ubiquitous phenomenon, yet little information is available on the role of glass surface structure in triggering scratch formation. In a new open-access study, University of Bayreuth researchers “scratch the surface” on understanding the surface structural elements of soda–lime–silica glass that contribute to scratch formation.
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Replication studies have demonstrated how slight changes in methodology can significantly affect results. Researchers in Mexico investigated the effect that one seemingly minor methodological change can have on experiments—the radius of the indenter tip used in scratch testing.
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The use of transparent ceramics as a gain medium in lasers is an evolving field, and there is still much to learn about how processing parameters affect the ceramics’ performance. Researchers in Singapore and China published two papers investigating the possible effects of a standard sintering aid and dispersant on lasing performance.
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The origins of the world ocean remain a much-debated topic to this day. A new paper by researchers from several universities in China and the Skolkovo Institute of Science and Technology in Russia posits that magnesium hydrosilicates served as reservoirs of water in early Earth.
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Sulfate attack is one of the most damaging causes of concrete deterioration. Two studies published this month look at the potential of new geopolymer mortars and the addition of nano alumina to improve concrete’s resistance to sulfate attack.
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