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 …

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 …

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).

The electric vehicle grease industry finds its bearings

Electric vehicles don’t require gasoline, but they do require grease. Existing greases are OK for windshield wipers, door hinges, and window winder mechanisms, but the bearings and gears in the drive train are a different story. High operating temperatures and voltages are key concerns. As current densities increase, so does the risk of stray currents that can pit bearings. Typical electric motor speeds, currently around 15,000 rpm, are expected to exceed 20,000 rpm in the near future.

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