利用X射线衍射、透射电子显微镜和差示扫描量热计分析表征了La55Al25Cu10Ni5Co5合金及其添加W颗粒后高能球磨产物的结构与相转变.由数个金属间化合物构成的La55Al25Cu10Ni5Co5合金经过机械研磨可转变为与熔体过冷形成的金属玻璃相类似的玻璃态合金,过冷液态温度区间的宽度△Tx可达到76 K.合金与W颗粒(体积分数10%-30%)的混和物机械研磨后,形成W纳米颗粒弥散分布于La基玻璃态合金基体上的复合材料.随着W含量的增加,基体合金的玻璃转变温度Tg和晶化起始温度Tx1均提高,同时△Tx增大,含30%W的复合材料,基体玻璃态合金的△Tx可达到92 K.
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