Troubleshooting Metalworking Fluids

Metalworking operations involve many interacting factors, only one of which is the metalworking fluid (MWF). Solving problems on the production floor requires identifying the factor (or factors) most responsible for the problem. Besides the MWF formulation, other contributors to machining performance include maintenance practices, the type of metalworking operation, machining variables (speed, feed, etc.), the workpiece metallurgy and the environment in the production area.

Nitrate Reduction Provides Insights into Evolving Electrode Structures

JACS Spotlights April 19, 2022 Wastewater treatments that reduce nitrate to form ammonia not only remove nitrate pollutants, but the resulting ammonia can be used in a variety of industrially useful reactions. William Tarpeh and colleagues recently studied the interacting effects of electrochemical nitrate reduction and the evolving structure and …

New Superatom Is Both Stable and Magnetic

JACS Spotlights March 22, 2022 Superatoms are small symmetric clusters of atoms with electronic states bunched together into closely packed shells. Like their individual-atom counterparts, superatoms with filled shells have the greatest electronic stability. Typical stable octahedral transition metal chalcogenide clusters have a single set of filled electron shells and …

Nanoparticle Assembly: Expanding the Realm of the Possible

JACS Spotlights Feb. 22, 2022 Nanoparticles assemble themselves into a multitude of compositions and structures, and the range of possible applications appears almost limitless. Robert Macfarlane and co-workers give an overview of the history and current state of nanoparticle assembly research, focusing on assembly approaches and emergent properties of the …

New Polymers Survive a Loss of Protection

JACS Spotlights, Feb. 9, 2022 Sulfur-containing organic molecules called thiols and thiocatechols are used in a variety of reactions involving the formation of disulfide bonds, coupling to double and triple bonds, and attachments to metal surfaces. In contrast, their polymer counterparts, thiophenol-pendant and dithiocatechol-pendant polymers, tend to oxidize and form …

Artificial intelligence for real-world mechanical systems

Artificial intelligence offers a wealth of resources for solving complex problems, but accurate predictions and understandable results still require human participation. TLT Feature February 2022 Artificial intelligence offers a wealth of resources for solving complex problems in mechanical friction and wear–helicopter transmissions and gears that are deep inside large machines, …

An indomitable particle: Colloidal silica takes on extreme environments

Colloidal silica stabilizes the ground under buildings during earthquakes and stops the spread of toxic pollutants below ground. It also preserves ancient carvings in the jungle, keeps the lenses and sensors aboard space vehicles clear and clean, and stands up to the hot, salty environment of petroleum and natural gas wells. It’s being tested as a construction material for 3D printed houses on Earth and for missions to the Moon and Mars. My e-book for W.R. Grace and C&EN BrandLab (gated content, free registration required). https://www.grace.com/blog/colloidal-silica-takes-on-extreme-environments/

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