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Microhardness measurement on haematite crystals at temperatures up to 900° C

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Abstract

The Vickers hardness of haematite crystals was measured at temperatures up to 900° C. In five different orientated specimens hardness decreases with increasing temperature, whereas the rate of decrease is more rapid up to 200 to 300° C than at higher temperatures. The scatter in values decreases with increasing temperature, which means that the effect of hardness anisotropy decreases at higher temperatures. Hot hardness testing promises to be very useful for geoscientific purposes and applicable to a wide range of experimental research.

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Authors and Affiliations

  1. Institut für Mineralogy, RWTH Aachen, 5100, Aachen, FRG

    Wolfgang Kollenberg

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  1. Wolfgang Kollenberg
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Kollenberg, W. Microhardness measurement on haematite crystals at temperatures up to 900° C. J Mater Sci 21, 4310–4314 (1986). https://doi.org/10.1007/BF01106547

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  • DOI: https://doi.org/10.1007/BF01106547

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