Crystal Growth of Aluminum Magnesium Borides from Al-Mg-B Ternary System Solutions and Properties of the Crystals

Shigeru Okada; Kunio Kudou; T. Mori; Takaaki Shishido; I. Higashi; Naoki Kamegashira; Kazuo Nakajima; T.  Lundström

doi:10.4028/www.scientific.net/MSF.449-452.365

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HomeMaterials Science ForumMaterials Science Forum Vols. 449-452Crystal Growth of Aluminum Magnesium Borides from...

Crystal Growth of Aluminum Magnesium Borides from Al-Mg-B Ternary System Solutions and Properties of the Crystals

Abstract:

Single crystals of AlMgB ₁₄ and AlMgB ₂₂ were grown from a high-temperature aluminum metal flux in an Ar atmosphere. The optimum conditions for growing AlMgB ₂₂ and AlMgB ₁₄ were established using the starting mixtures of B/Mg=0.5-1.0 and B/Mg=2.0-6.0. The AlMgB ₁₄ and AlMgB ₂₂ crystals obtained have well-developed {001} and {100} faces, and were black with a metallic luster. The maximum dimensions of these crystals were about 5.2 mm and 4.6 mm, respectively. The values of micro-Vickers hardness of the AlMgB ₁₄ and AlMgB ₂₂ crystals are in the ranges of 23.9±0.6-27.6±0.6 GPa. The oxidation process of AlMgB ₁₄ and AlMgB ₂₂ crystals were studied up to 1473 K by TG-DTA method. The susceptibility of AlMgB14 with an increase at low temperatures does not show any particular features, being indicative of a paramagnetic contribution, which is likely due to impurities. The susceptibility of the AlMgB ₂₂ sample shows no apparent contribution from impurities and also does not have any anomalous behavior.

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Materials Science Forum (Volumes 449-452)

Pages:

365-368

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.449-452.365

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Online since:

March 2004

Authors:

Shigeru Okada, Kunio Kudou, T. Mori, Takaaki Shishido, I. Higashi, Naoki Kamegashira, Kazuo Nakajima, T. Lundström

Keywords:

Al-Mg-B Ternary System Solution, AlMgB₁₄, AlMgB₂₂, Magnetic Susceptibility, Micro Vickers Hardness, Oxidation Resistance, Single Crystal

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References

[1] I. Higashi, M. Kobayashi, Y. Takahashi, S. Okada and K. Hamano: J. Crystal Growth Vol. 99 (1990) p.998.

Google Scholar

[2] I. Higashi, M. Kobayashi, S. Okada, K. Hamano and T. Lundström: J. Crystal Growth Vol. 128 (1993) p.1113.

Google Scholar

[3] V.I. Matkovich ed.: Boron and Refractory Borides (Spring-Verlag, New York, 1977) p.439.

Google Scholar

[4] H. Werheit, U. Kuhlmann, G. Krach, I. Higashi, T. Lundström and Y. Yang: J. Alloys Compd. Vol. 202 (1993) p.269.

Google Scholar

[5] K. Kudou, S. Okada, T. Mori, K. Iizumi, T. Shishido, T. Tanaka, I. Higashi, K. Nakajima, P. Rogl, Y.B. Andersson and T. Lundström: Jpn. J. Appl. Phys. Vol. 41 (2002) p. L928.

DOI: 10.1143/jjap.41.l928

Google Scholar

[6] T. Mori and T. Tanaka: J. Phys. Soc. Jpn. Vol. 68 (1999) p. (2033).

Google Scholar

[7] T. Mori, F. Zhang and T. Tanaka: J. Phys. Condensed Matter Vol. 13 (2001) p. L423.

Google Scholar