文章基本信息

标题：Exploring the process to obtain a composite based on Cr2O3–AlN using a method of hot pressing
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作者：Nikolay Prokopiv ; Oleg Kharchenko ; Edwin Gevorkyan 等
期刊名称：Eastern-European Journal of Enterprise Technologies
印刷版ISSN：1729-3774
电子版ISSN：1729-4061
出版年度：2019
卷号：3
期号：12
页码：17-21
DOI：10.15587/1729-4061.2019.171805
语种：English
出版社：PC Technology Center
摘要：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 Cr2O3–15AlNnano, the hardness and crack resistance of the dense material. The intensity of compacting the charge Cr2O3–15AlNnano 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∙m1/2. It was revealed that the structure of the dense material, newly formed during HP(Hot pressing) of the mixture Cr2O3–15AlNnano, is of the dispersed-strengthened type: the matrix phase from a solid solution of variable composition from the composition (Cr1-x–Alx)2О3 (0
关键词：ceramics;Cr2O3;AlN;nano-;micro powders;composite material;cutting plates;hot pressing