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Knoop Hardness Test Blocks
The Knoop Hardness Test makes a tiny indentation on a material’s surface through a pyramid-shaped diamond indenter. This is pressed into the material using a specific load: the load used will differ depending on the material, and application.
The Knoop test is particularly useful for determining the hardness of thin or delicate materials since it produces smaller indentations than other tests. The materials resistance can be precisely assessed by looking at the size and shape of the indentation.
Knoop Hardness Test Blocks
€383.00
Calibrated by our in-house UKAS accredited calibration laboratory and supplied with a UKAS calibration certificate. Also supplied with corrosion prevention packaging and storage case. Listed values are nominal, actual block will be within the specified range of the nominal value.
Characteristics of Knoop Hardness Testing
When a material is thin, tiny, or exhibits anisotropic qualities, the Knoop hardness testing method is typically employed. It works especially well for determining the hardness of individual microscopically sized features, thin coatings, and brittle materials. The following are some particular situations in which Knoop hardness testing is frequently used:
● Thin Films and Coatings
● Anisotropic Materials
● Micro Indentation
● Ceramic Materials
● Composite Materials
● Research and Development
Measuring
By leaving a small, elongated diamond-shaped impression on a substance’s surface, the Knoop hardness test determines how resistant a material is to indentation. The indentation that results from applying a certain load to the indenter is measured. The hardness value is measured using the longest diagonal of the indentation.
Knoop hardness testing is important for a wide range of industries and research applications as it is more suited than other hardness tests in terms of measuring hard, brittle, or thin materials with remarkable precision.
The material being tested, the force applied, and the dwell period all affect the Knoop test result. The softer the material, the bigger the measured diagonal.
The following distances must be kept between measurements to guarantee that the outcomes won’t be impacted:
Test Point Distance – It is necessary to maintain a test point distance for Knoop of 2.5 times the diagonal on the short side and 2 times the diagonal on the long side.
Border Edge Distance – It is usually advised to leave a border edge distance that is at least three times the indentation’s diagonal length for Knoop hardness testing.
Advantages of the Knoop Hardness Test:
When working with delicate or specialised materials, the Knoop hardness test has various benefits. Its most important advantage is that it can assess the hardness of small regions and extremely thin layers with remarkable precision. Because it reduces surface damage, the elongated diamond indenter is perfect for fragile materials like glass and ceramics.
Furthermore, a wide variety of materials, from soft to extremely hard, may be tested using the Knoop test to produce consistent and repeatable findings, guaranteeing accurate data for quality control and research.
When to Choose Knoop Hardness Testing?
When assessing the hardness of fragile and fragile materials, the Knoop Hardness Test provides unmatched accuracy. Its special diamond indenter forms a tiny, elongated indentation that makes precise measurements on tiny regions and thin layers possible.