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Nanolaminate

All articles tagged with #nanolaminate

technology1 month ago•6 min saved

Ultra-Strong and Ductile: Cobalt-Aluminum Nanolaminate Redefines Intermetallics

Purdue researchers engineered a cobalt-aluminum intermetallic nanolaminate with a framework of amorphous interfaces and preexisting dislocations via magnetron sputtering, achieving a room-temperature yield strength around 6 GPa and about 15% compressive plastic strain, making it roughly 6–10 times stronger than high-strength structural steel while remaining ductile. The material is demonstrated in nanoscale thin films, not bulk turbine components yet, but the approach could be generalized to other intermetallics to design both high strength and deformability for aerospace, energy, and defense applications.

via SciTechDaily|

#amorphous-interfaces #cobalt-aluminum #intermetallics

science-tech7 months ago•13 min saved

Tiny atomic leaks undermine the promise of a nano-thin electronic insulator

A 2010 claim that an aluminum oxide/titanium oxide nanolaminate could deliver a giant dielectric constant was later shown to be a measurement artifact caused by leakage paths in the first aluminum oxide layer formed during atomic layer deposition. The aluminum oxide layer didn’t grow evenly because the TMA precursor pulled oxygen from the underlying TiO2, creating weak spots. Once the process used ozone as the oxygen source, leakage was suppressed and the material behaved as a true insulator, highlighting that chemistry at a few atomic layers can be as decisive as thickness for reliable dielectrics.

via The Conversation|

#aluminum-oxide #atomic-layer-deposition #dielectrics

science-and-technology3 years ago•4 min saved

"Revolutionary Treatment Enhances Steel Alloys with Unmatched Strength and Flexibility"

Researchers at Purdue University and Sandia National Laboratories have developed a new treatment for T-91 steel alloy, resulting in a stronger and more ductile version called G-T91. The treatment creates ultra-fine metal grains in the outermost layer of the steel, conferring super-plasticity. This discovery could have significant implications for applications such as car axles and suspension cables. However, the exact mechanism behind this phenomenon remains unclear, and further research is needed to understand the behavior of the grain boundaries.

via SciTechDaily|

#material-science #nanolaminate #purdue-university