By It-Meng Low
MAX stages are a brand new category of fabrics that express a different mixture of features of either ceramics and metals. MAX levels are nano-layered ceramics with the overall formulation Mn+1AXn where "M" is an early transition steel, "A" is a group-A point and "X" is both carbon or nitrogen. Similiar to ceramics, they own low density, low thermal growth coefficient, excessive modulus and excessive energy, and stable hot temperature oxidation resistance. Like metals, they're solid electric and thermal conductors, quite simply machinable, tolerant to break and proof against thermal shock.I.M. Low has compiled 15 peer-reviewed chapters, written by way of a number one study of overseas reputation on MAX levels. The participants speak about synthesis, characterisation, modeling, microstructures, houses, ab-initio calculations and functions of MAS stages and ambitions the ongoing examine of complicated metals and ceramics.
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Extra info for Advances in science and technology of Mn+1AXn phases
It was found that MA enhanced both the formation of the Ti3SiC2 phase and the densification during the PS process. Self-propagating high-temperature synthesis (SHS) SHS relies on the ability of highly exothermic reactions to be self-sustaining. Compared with the PS method and other conventional methods, the SHS technique provides an attractive and practical route for producing 6 Published by Woodhead Publishing Limited 2012 Methods of MAX-phase synthesis and densiﬁcation – I advanced powders because of the advantages of saving energy, high efficiency and low cost.
6. M. Low, Z. E. Prince, Effect of vacuum annealing on the phase stability of Ti3SiC2. J. Am. Ceram. Soc. 90 (2007) 2610–2614. 7. K. M. M. Sun, In situ high-temperature diffraction study of thermal dissociation of Ti3AlC2 in vacuum. J. Am. Ceram. Soc. 93 (2010) 2871–2876. 8. K. M. H. J. K. P. Palmquist, Diffraction study of high-temperature thermal dissociation of Maxthal Ti2AlC in vacuum. J. Alloys Compds. 509 (2011) 172–176. xxxvi Published by Woodhead Publishing Limited 2012 Preface 9. M. K.
In the powder mixture containing no TiC, Ti3AlC was observed as an intermediate carbide. Experimental results showed that the formation of Ti3AlC led to a complex reaction route, and resulted in a higher formation temperature for Ti3AlC2 than that in the powder mixture containing TiC. Minimizing the formation of intermediate phases during synthesis of Ti3AlC2 is found to be the best way to shorten the synthesis time, to reduce processing temperature, as well as to increase the purity for Ti3AlC2.
Advances in science and technology of Mn+1AXn phases by It-Meng Low