Journal
INTERNATIONAL MATERIALS REVIEWS
Volume 65, Issue 4, Pages 226-255Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/09506608.2019.1637090
Keywords
MAB phases; atomically layered solids; ceramics; borides; review; magnetocaloric effect; alumina former
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Funding
- U.S. National Science Foundation [DMREF-1729335]
- Directorate for Engineering
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The MAB phases are atomically layered, ternary or quaternary transition metal (M) borides (TMBs), with the general formula (MB)(2z)A(x)(MB2)(y) (z = 1-2; x = 1-2; y = 0-2), whose structures are composed of a transition M-B sublattices interleaved by A-atom (A = Al,Zn) mono- or bilayers. Most of the MAB phases were discovered before the 1990s, but recent discoveries of intriguing magnetocaloric properties, mechanical deformation behaviour, catalytic properties, and high-temperature oxidation resistance has led to their 're-discovery'. Herein, MAB phase synthesis is reviewed and their magnetic, electronic, thermal, and mechanical properties are summarized. Because the M-B layers in the MAB phases structurally resemble their corresponding binaries of the same M:B stoichiometry, the effects of the A-layers on properties are discussed. Inconsistencies in the literature are critically assessed to gain insights on the processing-structure-property relations, suggest fruitful avenues for future research, and identify limitations for prospective applications.
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