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Ultrasonic Method to Measure Thickness ultrasonic instruments with a graphical LCD illustrate substrate roughness by displaying wide "peaks" when the substrate is rough and narrow "peaks" when it is smooth. This type of display helps in measuring coating systems in which the number of layers is ... Read More
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FILM & TAPE EXPO SHENZHEN 2024 FILM & TAPE SHENZHEN exhibition will be held at Shenzhen International Convention and Exhibition Center (Bao'an New Hall) from November 6 to 8, 2024. As a vane exhibition in the field of film, tape, coating and die-cutting, it has been forging ahead for 15 years and is ... Read More
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What is Eddy Current Technique? The most common use of eddy current measurement is for non-conductive coatings over non-ferrous metals such as anodize or paint over aluminum. This technique allows for an accurate reading with even very thin materials through elimination of the base effect. How eddy ... Read More
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Differential Interference Contrast (DIC), also known as Nomarski Contrast, helps to visualize small height differences on the specimen surface, thus enhancing feature contrast. DIC uses a Wollaston prism together with a polarizer and analyzer whose transmission axes are perpendicular (crossed at 90°... Read More
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The Difference Between Brightfield and Barkfield Brightfield (BF) illumination is the most common illumination technique for metallographic analysis. In incident BF, the light path comes from the light source, passes through the objective lens, is reflected off the surface of the specimen, returns ... Read More
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Rockwell Indentation Spacing The hardness of the material immediately surrounding a previously made indentation will usually increase due to the induced residual stress and work hardening caused by the indentation process. If a new indentation is made in this affected material, the measured hardness ... Read More
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Two major reasons to do hardness testing for metal materials: a, to verify the heat treatment of a part and to determine if a material has the properties necessary for its intended use; b, to determine the characteristics of materials whether qualified in industrial and R&D applications. Features of ... Read More
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Nondestructive Magnetic Thickness Measurement The iqualitrol magnetic gages are widely used to measure electroplating, nickel coatings, phosphating, paint, plastic and coatings such as enamel on steel. Based on the Magnetic Attraction principle, they allow for the quick, precise, nondestructive ... Read More
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Knoop hardness test usually refers to static indentations made with loads not exceeding 1 kgf. The indenter is Knoop elongated diamond pyramid. The procedure for testing is very similar to that of the standard Vickers hardness test, except that it is done on a microscopic scale with higher precision ... Read More
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The Vickers hardness test method consists of indenting the test material with a diamond indenter, in the form of a right pyramid with a square base and an angle of 136 degrees between opposite faces subjected to a load of 1 to 100 kgf. The full load is normally applied for 10 to 15 seconds. The two ... Read More
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