Ni-Ti-Zr-Al-Cu-Si块体非晶合金的形成及压缩性能

稀有金属材料与工程, 2006, 35(9): 1441-1444.

Ni-Ti-Zr-Al-Cu-Si块体非晶合金的形成及压缩性能

梁维中 ^1, , 宁志良 ^2, , 孙剑飞 ^3, , 沈军 ^4,

1.哈尔滨工业大学,黑龙江哈尔滨 150001;哈尔滨理工大学,黑龙江哈尔滨 150040

2.哈尔滨工业大学,黑龙江哈尔滨 150001

3.哈尔滨工业大学,黑龙江哈尔滨 150001

4.哈尔滨工业大学,黑龙江哈尔滨 150001

基金项目: 教育部跨世纪优秀人才培养计划

关键词： NiTiZrAlCuSi合金 , 块体非晶合金 , 玻璃形成能力 , 压缩性能

Formation and Compressive Properties of a Ni-Ti-Zr-Al-Cu-Si Amorphous Alloy

利用DSC,DTA,XRD研究了NiTiZrAlCuSi块体非晶合金的形成.采用铜模铸造工艺使块体金属玻璃最大直径从Ni42Ti25Zr25Al8合金的小于0.5 mm增加到Ni42Ti20Zr25Al8Cu5的1 mm,然后增加到Ni42Ti20Zr21.5Al8Cu5Si3.5合金的4mm.在Ni42Ti20Zr21.5AlaCu5Si3.5和Ni42Ti20Zr20.5AlaCu5Si4.5合金中获得最大的约化玻璃转变温度Trg(=Tg/T1)及最大的过冷液相区△Tx(=Tx-Tg),分别为0.570和93 K.Si显著增加玻璃形成能力主要是抑制引起异质形核的Ni(TiZr)相和(TiZr)(CuAl)2相的形成.室温压缩实验表明:Ni42Ti20Zr21.5Al8Cu5Si3.5合金抗压断裂强度为2724MPa.

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