Structure and phase composition of the (TiB) - Ti metal matrix composites obtained during SHS and vacuum sintering
Structure and phase composition of powder (TiB) - Ti metal matrix composites synthesized under wave combustion with subsequent vacuum sintering were studied. The selected ratio of reacting components corresponded to the presence of unreacted titanium in the combustion products. The behavior of the studied SHS composite powders under vacuum sintering is estimated. Analysis of volumetric and structural changes in compacts made of SHS powder showed that at sintering temperatures of 1300-1350 °С, a significant structure transformation does not occur with a slight decrease in the compacts volume and the residual pores content. A qualitative phase composition is maintained regardless of the amount of excess titanium and the selected sintering temperature of the metal matrix composite. The vacuum sintering condition facilitated the redistribution of the phase proportion that formed in a nonequilibrium state during the synthesis. After sintering, the titanium diboride phase content decreases in favor of a more stable titanium monoboride.
Keywords
бориды титана,
самораспространяющийся высокотемпературный синтез,
металломатричный композит,
вакуумное спекание,
фазовый состав,
titanium borides,
self-propagating high temperature synthesis (SHS),
metal matrix composite,
vacuum sintering,
phase compositionAuthors
| Korosteleva E.N. | Institute of Strength Physics and Materials Science of SB RAS | elenak@ispms.tsc.ru |
| Korzhova V.V. | Institute of Strength Physics and Materials Science of SB RAS | vicvic5@mail.ru |
Всего: 2
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