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通过单辊快淬制备了Al85Ni9-xCuxLa6合金的初生相由单独亚稳相MP1逐渐向单独fcc-Al转变,而Al86Ni9-xCoxLa5合金的初生相由单独fcc-Al逐渐向fcc-Al、亚稳bcc-(AlNi)11La3-like相和MP1转变,并趋于析出单独MP1;Cu,Co置换Ni分别降低和提高热稳定性:Al85>Ni9-xCuxLa6<和Al86Ni9-xCuxLa5合金的晶化开始温度Tx1分别从x=0时的545.5和520.3 K逐渐减至x=8时的415.0 K和x=7时的390.1 K,而Al85>Ni9-xCoxLa6和Al86Ni9-xCoxLa5合金的Tx1分别逐渐增至x=6时的592.2 K和x=9时的576.8 K;Cu,Co置换Ni分别减弱和增强玻璃转变:Al85>Ni9-xCuxLa6合金的玻璃转变迅速减弱,过冷液相区宽度△Txx=0时的16.5 K逐渐减至x=2时的14.6 K,并于x>2时完全消失,Al86Ni9-xCuxLa5合金即使当x=1时玻璃转变也随之消失,而Al85>Ni9-xCoxLa6和Al86Ni9-xCoxLa5合金的△Tx分别从x=0时的16.5和15.4 K逐渐增至x=6时的26.0 K和x=5时的19.9 K.

参考文献

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