Formation of Ti3AlC2by mechanically induced self-propagating reaction in Ti–Al–C system at room temperature

Autor:	Guoping Bei, S.-B. Li, Z. L. Zhang, Ying Zhou, H.-X. Zhai
Rok vydání:	2006
Předmět:	Exothermic reaction Diffraction Materials science Scanning electron microscope Mechanical Engineering Metallurgy Condensed Matter Physics Microstructure Chemical engineering Mechanics of Materials Phase composition visual_art visual_art.visual_art_medium General Materials Science Ceramic
Zdroj:	Materials Science and Technology. 22:667-672
ISSN:	1743-2847 0267-0836
DOI:	10.1179/174328406x91050
Popis:	The formation of Ti3AlC2 was first investigated by mechanically induced self-propagating reaction (MSR) in Ti–Al–C system at room temperature. The effects of the milling parameters on the formation of Ti3AlC2 were discussed. The phase composition and microstructure were analysed and observed by using X-ray diffraction and scanning electron microscopy, respectively. The formation mechanism of Ti3AlC2 was analysed. An MSR was ignited during mechanical alloying of Ti, Al and C powders after a short time. An exothermic reaction between Ti and Al in the Ti–Al–C system first occurred after a certain milling time. Then, Ti–C reaction was induced at high temperature. All of the above reactions were exothermic that resulted in Ti–Al liquid formation. The previously formed TiC dissolved into and nucleated in the Ti–Al liquid. At last, Ti3AlC2 formed between the Ti–Al melt and the TiC. The final products consist of Ti3AlC2, TiC and Al3Ti.
Databáze:	OpenAIRE
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