measurement Archives | The American Ceramic Society

measurement

Terahertz measurement technique resolves individual layer thickness within multilayer coatings

By April Gocha / July 15, 2016

Scientists at University of Kaiserslautern and Fraunhofer Institute for Physical Measurement Techniques in Kaiserslautern, Germany, have developed a technique that uses time of flight measurements from terahertz pulses to resolve individual layers within multilayered surfaces—now all the way down to 4 micrometers.

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Video: Scientists look to define kilogram with a super-round silicon sphere

By Eileen De Guire / August 23, 2013

   The  kilogram is the only base unit in the SI system defined by an object—a platinum-iridium alloy cylinder kept in a vault in France. Efforts are underway to define the kilogram based on fundamental material properties. (Credit: Muller; YouTube.) Stronger! Faster! Cheaper! These are the daily calls-to-action of engineers, and progress depends on the…

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Olympic marathon course comes down to NIST calibration

By Eileen De Guire / July 6, 2012

Researchers calibrate measuring tapes of all types in the 60-meter long NIST tape tunnel. Credit: NIST. Years of preparation go into the Olympics. What we see is the preparation payoff for the athletes, but behind the scenes, there is plenty of pressure to perform at Olympic-caliber levels. Take the measurement teams, for example. They get…

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Hot stuff: Measuring thermophysical properties at very high temperatures

By Eileen De Guire / April 17, 2012

Calvet-type high-temperature oxide melt solution calorimeter and drop solution experiment. Credit: JACerS; Wiley. There is some pretty interesting work underway on ceramic materials for ultra-high temperature applications. Service temperatures of more than 1,500°C requires the use of ceramic materials rather than refractory alloys. Development of these ceramics is driven mostly by aerospace applications, such as…

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Useful metrics for comparing new energy storage technologies

By Eileen De Guire / March 29, 2012

A typical mid-size family sedan carries a 200 hp engine. How meaningful is that metric for modern, non-agrarian drivers? Similarly, old ways of measuring battery utility might not be all that useful for comparing new energy storage technologies. Credit: Marchal: Wikipedia. I drive a 2005 Chevy Malibu LS, as do many thousands of other people.…

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