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采用机械合金化法制备Al_(75)Fe_(12.5)V_(12.5)非晶粉末,在升温速率为20K/min时的晶化峰宽度和结晶温度范围较大,过冷液相区宽度为34K。由Kissinger方程计算的晶化激活能大于由Ozawa方程计算的晶化激活能,非晶粉末在723K采用SPS烧结,得到的XRD图谱中仅出现单一的漫散峰,块体合金处于完全非晶状态。由于非晶粉末在SPS烧结时产生结构弛豫现象并存在微量纳米晶,使非晶漫散峰的半高宽变窄。
Al_ (75) Fe_ (12.5) V_ (12.5) amorphous powders were prepared by mechanical alloying method. The range of crystallization peak width and crystallization temperature ranged from 20 K / min to 20 K / min. The width of supercooled liquid region was 34K . The crystallization activation energy calculated by the Kissinger equation is larger than that calculated by the Ozawa equation. The amorphous powder is SPS sintered at 723K. The resulting XRD pattern shows only a single diffuse peak, and the bulk alloy is in a completely amorphous state . Due to the structural relaxation phenomena and the presence of a small amount of nanocrystals during the SPS sintering of the amorphous powder, the full width at half maximum of the amorphous diffuse peak is narrowed.