Given how strength and toughness depend on the density and grain size, it might be expected that the plastic deformation of the material under indentation would also depend on density and grain size. It is somewhat surprising, therefore, that a cursory examination of the data for the Vickers hardness. of TiB2 has no immediately perceptible dependence on either density or grain size. P is the applied load, and d is the length of the diagonal of the indentation impression. However, there is a significant scatter in the data that appears to be principally a consequence of measurement differences, particularly the use of different indentation loads; the data are consistent with the indentation size effect, according to which the size of the diagonal length of the indentation impression is related to the applied load; this relation is often assumed to be in the form of the Meyer law. Even under such restricted conditions, the wear behavior of TiB2 is complicated by its interaction with oxygen in the atmosphere. Results from a ring-on-block test of the wear of TiB2 for a density of 4.32 g/cm3 and a grain size of 2 μm. For temperature less than 600 °C, the amount of material removed during the test increases with increasing sliding distance but decreases with increasing temperature. For temperatures greater than 600 °C, the specimens gain mass with the amount of mass gain increasing with increasing sliding distance. The decrease of mass loss and the occurrence of mass gain appears to result from the formation of B2O3 in the wear track of the specimens. If you are looking for high quality, high purity, and cost-effective Titanium diboride, or if you require the latest price of Titanium diboride, please feel free to email contact mis-asia.
