Synthesis of the novel Zr₃AlC₂ MAX phase

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• 作者：T. Lapauw^a ; ^b ; ^{thomas.lapauw@mtm.kuleuven.be" class="auth_mail" title="E-mail the corresponding author} ; J. Halim^c ; ^d ; J. Lu^d ; T. Cabioc'h^e ; L. Hultman^d ; M.W. Barsoum^c ; ^d ; K. Lambrinou^b ; J. Vleugels^a
• 关键词：MAX phase ; X-ray diffraction ; Reactive hot pressing ; Hydrides
• 刊名：Journal of the European Ceramic Society
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：36
• 期：3
• 页码：943-947
• 全文大小：2323 K

文摘

Herein we report, for the first time, on the synthesis and structural characterization of the Zr-based MAX phase, Zr₃AlC₂, fabricated by reactive hot pressing of ZrH₂, Al, and C powders. The crystal structure of Zr₃AlC₂ was determined by X-ray diffraction and high resolution transmission electron microscopy to be the hexagonal space group P63/mmc. The a and c lattice parameters are 3.33308(6) Å and 19.9507(3) Å, respectively. The samples include the secondary phases ZrC and Zr–Al intermetallics as confirmed by quantitative electron probe microanalysis. The Vickers hardness, using a force of 30 N, was measured to be 4.4 ± 0.4 GPa.