关键词: 机械合金化, Laves相, Cr₂Nb, 固相热反应, 合成

Abstract: The effect of mechanical alloying ( MA) on synthesizing of Laves phase Cr₂Nb by solid phase thermal re??action has been investig ated. The results indicate that MA can produce an effect of mechanically activated synthesiz??ing of Laves phase Cr₂Nb, making sy nthesizing temperature fall obv iously. The temperature above 1200℃ is re??quired for fully synthesizing of Laves phase Cr₂Nb from elemental chr omium and niobium powders. While a temper??atur e as low as 900℃?? is feasible to do so from milled pow ders. T he MA time can affect t he ex tent o f synthesizing ofLaves phase Cr₂Nb. I n order to fully synthesize Laves phase Cr₂Nb by a 3h annealing at 900℃ , a MA time of 15his necessary.

Key words: mechanical alloying, laves phase, Cr_2Nb, solid phase thermal reaction, synthesis