3 research outputs found
Research of Thermal Stability of Tapes of Diboride of Hafnium and Receipt of Optimization Model of Cutting Process
The short analysis of thermal stability and features of structure and physical-mechanical descriptions of thin wearproof coverages is executed on the basis of diborides of transitional metals, under act of high temperatures.
The optimization model of cutting process is presented by the hard-alloy plate of Π’15Π6 with nanocrystalline tape of diboride of hafnium, by possessing the best physical-mechanical descriptions nanohardness of Π = 44,5 GPa and module of resiliency of Π = 396 GPa
Thermal Stability of Hafnium Diboride Films, Obtained on Substrates of Steel 12X18H9T and Cutting Plate T15K6
Investigation results of the influence of high-temperature annealing in the air environment on the
phase structure and structure of hafnium diboride films, received on substrates from steel 12Π₯18Π9Π’ and
cutting plate Π’15Π6 are presented. It is shown that in the course of annealing on a surface of HfΠ2 film the
oxide layer of HfΠ2, with monoclinic structure is formed. Thus, annealing temperature increase from 600 to
1000 Π‘ leads to increase in thickness of an oxide layer from 100 to 600 nanometers and to formation of a
multilayered covering of HfB2 - HfO2. On substrates of steel 12Π₯18Π9Π’ the coating is destructed at the
temperature higher on 800 C than for Π’15Π6.
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