Imperial College London
Alternate

Professor WE (Bill) Lee FREng

Faculty of Engineering, Institute for Security Science & Technology

Distinguished Research Fellow
 
 
 
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Contact

 

w.e.lee Website

 
 
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Assistant

 

Miss Eva Konstantara +44 (0)20 7594 8864

 
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Location

 

Abdus Salam LibrarySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Kota:2016:10.1038/srep26475,
author = {Kota, S and Zapata-Solvas, E and Ly, A and Lu, J and Elkassabany, O and Huon, A and Lee, WE and Hultman, L and May, SJ and Barsoum, MW},
doi = {10.1038/srep26475},
journal = {Scientific Reports},
title = {Synthesis and Characterization of an Alumina Forming Nanolaminated Boride: MoAlB},
url = {http://dx.doi.org/10.1038/srep26475},
volume = {6},
year = {2016}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The ‘MAlB’ phases are nanolaminated, ternary transition metal borides that consist of a transition metal boride sublattice interleaved by monolayers or bilayers of pure aluminum. However, their synthesis and properties remain largely unexplored. Herein, we synthesized dense, predominantly single-phase samples of one such compound, MoAlB, using a reactive hot pressing method. High-resolution scanning transmission electron microscopy confirmed the presence of two Al layers in between a Mo-B sublattice. Unique among the transition metal borides, MoAlB forms a dense, mostly amorphous, alumina scale when heated in air. Like other alumina formers, the oxidation kinetics follow a cubic time-dependence. At room temperature, its resistivity is low (0.36–0.49 μΩm) and – like a metal – drops linearly with decreasing temperatures. It is also a good thermal conductor (35 Wm−1K−1 at 26 °C). In the 25–1300 °C temperature range, its thermal expansion coefficient is 9.5 × 10−6 K−1. Preliminary results suggest the compound is stable to at least 1400 °C in inert atmospheres. Moderately low Vickers hardness values of 10.6 ± 0.3 GPa, compared to other transition metal borides, and ultimate compressive strengths up to 1940 ± 103 MPa were measured at room temperature. These results are encouraging and warrant further study of this compound for potential use at high temperatures.
AU  - Kota,S
AU  - Zapata-Solvas,E
AU  - Ly,A
AU  - Lu,J
AU  - Elkassabany,O
AU  - Huon,A
AU  - Lee,WE
AU  - Hultman,L
AU  - May,SJ
AU  - Barsoum,MW
DO  - 10.1038/srep26475
PY  - 2016///
SN  - 2045-2322
TI  - Synthesis and Characterization of an Alumina Forming Nanolaminated Boride: MoAlB
T2  - Scientific Reports
UR  - http://dx.doi.org/10.1038/srep26475
UR  - http://hdl.handle.net/10044/1/34659
VL  - 6
ER  -
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