Journal ArticleDOI
Ta3AlC2 and Ta4AlC3--single-crystal investigations of two new ternary carbides of tantalum synthesized by the molten metal technique.
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TLDR
Single crystals of the new ternary carbides Ta4AlC3 and Ta3AlC2 were synthesized from molten aluminum and characterized XRD, EDX, and WDX measurements, and crystal structures were refined for the first time on the basis of single-crystal data.Abstract:
Single crystals of the new ternary carbides Ta4AlC3 and Ta3AlC2 were synthesized from molten aluminum and characterized XRD, EDX, and WDX measurements. Crystal structures were refined for the first time on the basis of single-crystal data. Both compounds crystallize in a hexagonal structure with space group P63/mmc and Z = 2. The lattice constants are a = 3.1131(3) A and c = 24.122(3) A for Ta4AlC3 and a = 3.0930(6) A and c = 19.159(4) A for Ta3AlC2. The crystal structures can be explained with a building block system consisting of two types of partial structures. The intermetallic part with a composition TaAl is a two layer cutting of a hexagonal closest packing. The carbide partial structure is a fragment of the binary carbide TaC (NaCl type). It consists of three (Ta4AlC3) or two layers (Ta3AlC2) of CTa6-octahedra linked via common corners and edges. Both compounds are members of the series (TaC)nTaAl. The crystal quality of Ta3AlC2 is improved by using a Al/Sn melt for crystal growth leading to small ...read more
Citations
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Journal ArticleDOI
The Mn+1AXn phases: Materials science and thin-film processing
TL;DR: A critical review of the M(n + 1)AX(n) phases from a materials science perspective is given in this article, where the authors discuss the potential for low-temperature synthesis, which is essential for deposition of MAX phases onto technologically important substrates.
Journal ArticleDOI
Progress in research and development on MAX phases: a family of layered ternary compounds
TL;DR: The MAX phases are a group of layered ternary compounds with the general formula Mn+1AXn (M: early transition metal; A: group A element; X: C and/or N; n = 1-3), which combine some properties of metals such as good electrical and thermal conductivity, machinability, low hardness, thermal shock resistance and damage tolerance, with those of ceramics, such as high elastic moduli, high temperature strength, and oxidation and corrosion resistance as mentioned in this paper.
Journal ArticleDOI
Elastic and Mechanical Properties of the MAX Phases
TL;DR: In this paper, the authors review the current understanding of the elastic and mechanical properties of bulk MAX phases where they differ significantly from their corresponding MX counterparts, and show that the MAX phases are relatively soft (2.8 GPa), are most readily machinable, and are damage tolerant.
Journal ArticleDOI
Liquid metals: fundamentals and applications in chemistry
Torben Daeneke,Khashayar Khoshmanesh,Nasir Mahmood,I. A. de Castro,Dorna Esrafilzadeh,Steven J. Barrow,Michael D. Dickey,Kourosh Kalantar-zadeh +7 more
TL;DR: This review provides a comprehensive overview of the fundamentals underlying liquid metal research, including liquid metal synthesis, surface functionalisation and liquid metal enabled chemistry, and discusses phenomena that warrant further investigations in relevant fields.
Journal ArticleDOI
On the Chemical Diversity of the MAX Phases
TL;DR: The Mn+1AXn (or MAX) phases as mentioned in this paper are characterized by a unique combination of both metallic and ceramic properties, which are precursors for MXenes and the dramatic increase in interest in the latter for a large host of applications.
References
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Journal ArticleDOI
Synthesis and Characterization of a Remarkable Ceramic: Ti3SiC2
Michel W. Barsoum,Tamer El-Raghy +1 more
TL;DR: In this paper, a polycrystalline bulk sample of Ti sub 3, SiC sub 2 was fabricated by reactively hot-pressing Ti, graphite, and SiC powders at 40 MPa and 1,600 C for 4 h.
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Synthesis and Characterization of Ti3AlC2
TL;DR: In this article, the authors fabricated polycrystalline bulk samples of Ti 3 Al 1.1 C 1.8 by reactively hot isostatically pressing a mixture of titanium, graphite, and Al 4 C 3 powders at a pressure of 70 MPa and temperature of 1400°C for 16 h.
Journal ArticleDOI
The MAX Phases: Unique New Carbide and Nitride Materials
Michel W. Barsoum,Tamer El-Raghy +1 more
Journal ArticleDOI
Die Kristallstruktur von Ti 3 SiC 2 —ein neuer Komplexcarbid-Typ
Wolfgang Jeitschko,H. Nowotny +1 more
TL;DR: In this article, Ti3SiC2 wird aus Einkristallaufnahmen bestimmt, i.e., a hexagonalen Zelle with Gitterparameter a=3,068,c=17,669 A undc/a=5,759.