Crystal growth of MgAlB14-type compounds using metal salts and some properties

LEAlB14 (orthorhombic, Imam) (LE = Li, Mg) crystals were grown using metal salts (Li2CO3, LiF, LiI, MgO, MgF2, Mgbeta) and crystalline boron from a high-temperature aluminium metal flux. The growth conditions for growing LEAlB14 were established using the starting mixtures of B/LE = 2.0, and Al meta...

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Published inJournal of alloys and compounds Vol. 458; no. 1-2; pp. 297 - 301
Main Authors OKADA, Shigeru, SHISHIDO, Toetsu, MORI, Takao, IIZUMI, Kiyokata, KUDOU, Kunio, NAKAJIMA, Kazuo
Format Journal Article
LanguageEnglish
Published Lausanne Elsevier 30.06.2008
Subjects
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science; rheology
Exact sciences and technology
Growth from melts; zone melting and refining
Materials science
Mechanical and acoustical properties of condensed matter
Mechanical properties of solids
Methods of crystal growth; physics of crystal growth
Physics
Surface treatments
Tribology and hardness
Aluminium Magnesium Borides
Vickers microhardness
Aluminium Lithium Borides
Vickers hardness
Oxidation resistance
Metal salts
MgAIB14
Lattice parameters
LiAIB14
Microhardness
Crystal growth from melts
Magnetic susceptibility
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Summary:LEAlB14 (orthorhombic, Imam) (LE = Li, Mg) crystals were grown using metal salts (Li2CO3, LiF, LiI, MgO, MgF2, Mgbeta) and crystalline boron from a high-temperature aluminium metal flux. The growth conditions for growing LEAlB14 were established using the starting mixtures of B/LE = 2.0, and Al metal was added to each mixture at a mass ratio of 1:15-20. LEAlB14 crystals from the Al-self flux using metal salts could be obtained from all the different salts. The maximum dimensions of LiAlB14 and MgAlB14 crystals were approximately 18 and 12 mm for the crystals obtained from LiF and MgF2. The unit-cell parameters of as-grown LEAlB14 are as follows: for LiAlB14, obtained from LiF, a = 0.5846 (2) nm, b = 0.8144 (2) nm, c = 1.0355 (3) nm, V = 0.4930 (2) nm3: for MgAlB14, obtained from MgF2, a = 0.5845 (2) nm, b = 0.8114 (2) nm, c = 1.0330 (3) nm, V = 0.4899 (3) nm3. Microhardness, oxidation resistance and magnetic susceptibility of these materials are described in detail.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2007.01.187