Exploring the process to obtain a composite based on Cr2O3–AlN using a method of hot pressing
| Autor: | Oleg Kharchenko, Edwin Gevorkyan, Nikolay Prokopiv, Yuriy Gutsalenko |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Exothermic reaction
Materials science 020209 energy Composite number 0211 other engineering and technologies Compaction Energy Engineering and Power Technology 02 engineering and technology ceramics cr2o3 Hot pressing Industrial and Manufacturing Engineering hot pressing Fracture toughness Management of Technology and Innovation Phase (matter) 021105 building & construction lcsh:Technology (General) 0202 electrical engineering electronic engineering information engineering lcsh:Industry Ceramic Electrical and Electronic Engineering Composite material aln Applied Mathematics Mechanical Engineering micro powders cutting plates composite material Computer Science Applications Control and Systems Engineering visual_art visual_art.visual_art_medium lcsh:T1-995 lcsh:HD2321-4730.9 nano Solid solution |
| Zdroj: | Eastern-European Journal of Enterprise Technologies, Vol 3, Iss 12 (99), Pp 17-21 (2019) |
| ISSN: | 1729-4061 1729-3774 |
| Popis: | We have established the influence of heating rate of 150, 350 and 600 °C/min, pressure of 8 and 18 MPa, on the compaction process of the reaction mixture Cr 2 O 3 –15AlN nano , the hardness and crack resistance of the dense material. The intensity of compacting the charge Cr 2 O 3 –15AlN nano depends on the pressure magnitude and the rate of heating. A pressure of 18 MPa ensures the complete compaction of the mixture regardless of the specified heating rate while a pressure of 8 MPa provides for the complete compaction of the material only at the rate of heating of 600 °C/min. For the heating rate of 600 °C/min, compaction curves of the mixture at pressures 8 and 18 MPa are similar in shape. It was established that at a heating rate of 600 °C/min the compaction process of the mixture, in addition to pressure, is additionally activated by the effect of exothermic reaction among its components. Increasing the rate of heating from 150 to 600 °C makes it possible to improve the hardness and crack resistance of the dense material by, respectively, 1.0 GPa and 1.5MPa∙m 1/2 . It was revealed that the structure of the dense material, newly formed during HP(Hot pressing) of the mixture Cr 2 O 3 –15AlN nano, is of the dispersed-strengthened type: the matrix phase from a solid solution of variable composition from the composition (Cr 1-x –Al x ) 2 О 3 (0 |
| Databáze: | OpenAIRE |
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