Hot hardness and Micro-hardness tester
Rockwell Hardness testers are available for room temperature microhardness testing on the ‘B’ and ‘C’ scales with the use of a 1/16” diameter ball for the former and a BRALE diamond indenter for the latter. A variety of calibration blocks and load scales are available for utilization with the other scales (e.g. 15-N, 30-N, etc.).
Hot microhardness testing with either Vickers or Knoop indenters is possible on a NIKON QM Hot Microhardness Testing machine. Samples can be tested in high vacuum or under inert gas with indentation loads ranging from 100 grams up to 1 kg at temperatures up to 1000C. Vickers diamond indenters are useful up to 800C while sapphire indenters are appropriate at higher temperatures, particularly if reaction between the sample and diamond indenter is possible.
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