The effect of the synthesis temperature on the phase composition, size distribution and morphology of AlMgB 14 particles obtained by direct interaction of elemental Al, Mg and B powders with the addition of free carbon in a vacuum of 10-2 Pa at 1200 - 1400 & # 176 ; C. The synthesized powders were analyzed by X-ray diffraction, SEM, EDX, and laser diffraction. The highest mass content of the main phase AlMgB 14 (94 & # 37;) was obtained at a synthesis temperature of 1200 - 1300 & # 176; C and holding for 1 h. Impurities MgA l2 O 4 , as well as magnesium-depleted spinel and AlB 12 at holding temperatures above 1300 & # 176; C
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